Balsam Of Peru Research Articles

Contact allergy in atopic dermatitis: A prospective study on prevalence, incriminated allergens and clinical insights.

The relationship between atopic dermatitis (AD) and allergic contact dermatitis (ACD) is a matter of debate. The purpose of our study is to assess the frequency of ACD in patients with AD, the incriminated allergens and the potential risk factors. This is a prospective study, including cases of AD diagnosed based on Hanifin and Rajka's criteria. All patients were patch tested to the European baseline series and corticosteroid series. Ninety-three patients were included. Fifty-six patients (60.2%) had positive patch test results of which 71.4% were relevant. The most frequent allergens were: textile dye mix (24.7%), nickel (20.4%), cobalt (12.9%), isothiazolinone (8.6%), quanterium 15 (4.3%) and balsam of Peru (4.3%). Chromium, fragrance mix I, fragrance mix II and PTBP were positive in three cases (3.2%). Two cases of allergy to corticoids were identified. Facial involvement and duration of AD were significantly associated with contact sensitization (p = 0.04 and p = 0.005, respectively). Avoidance of relevant allergens resulted in a statistically significant decrease in SCORAD (p < 0.001). ACD remains an important co-morbidity of AD. We observed a high frequency of ACD to textile dyes, isothiazolinones and fragrances. Avoidance of relevant allergens has resulted in an improvement of patients' skin symptoms.

Contact allergies to dental materials in patients.

Concerns regarding contact allergies and intolerance reactions to dental materials are widespread among patients. Development of novel dental materials and less frequent amalgam use may alter sensitization profiles in patients with possible contact allergy. To analyse current sensitization patterns to dental materials in patients with suspected contact allergy. This retrospective, multicentre analysis from the Information Network of Departments of Dermatology (IVDK) selected participants from 169 834 people tested in 2005-2019 and registered with (i) an affected area of 'mouth' (and 'lips'/'perioral'), (ii) with the dental material in question belonging to one of three groups (dental filling materials, oral implants or dentures or equivalents) and (iii) with patch-testing done in parallel with the German baseline series, (dental) metal series and dental technician series. A total of 2730 of 169 834 tested patients met the inclusion criteria. The patients were predominantly women (81.2%) aged ≥ 40 years (92.8%). The sensitization rates with confirmed allergic contact stomatitis in women (n = 444) were highest for metals (nickel 28.6%, palladium 21.4%, amalgam 10.9%), (meth)acrylates [2-hydroxyethyl methacrylate (HEMA) 4.8%] and the substances propolis (6.8%) and 'balsam of Peru' (11.4%). The most relevant acrylates were HEMA, 2-hydroxypropyl methacrylate, methyl methacrylate, ethylene glycol dimethacrylate and pentaerythritol triacrylate. Few men were diagnosed with allergic contact stomatitis (n = 68); sensitization rates in men were highest for propolis (14.9%) and amalgam (13.6%). Allergic contact stomatitis to dental materials is rare. Patch testing should not only focus on metals such as nickel, palladium, amalgam and gold, but also (meth)acrylates and the natural substances propolis and 'balsam of Peru'.

Corporate Social Responsibility Practices in China's Petroleum Industry: A Comparative Analysis of PetroChina and Sinopec

Against the backdrop of global energy transition, Chinese petroleum enterprises are facing both opportunities and challenges. This study employs a literature review approach and a comparative case analysis method to thoroughly examine the corporate social responsibility (CSR) practices of PetroChina and Sinopec in the domains of environmental protection, social responsibility, and employee welfare. The research reveals disparities between the two companies concerning preventive environmental management, prioritized philanthropic efforts, and employee rights safeguarding. Consequently, the study proposes three recommendations encompassing strategic integration, participation in international standards, and internal organizational significance construction, aiming to enhance CSR implementation. By offering practical insights, this research serves as a reference for Chinese petroleum enterprises, contributing to their improved international competitiveness and reputation. In the ever-evolving landscape of sustainability and business ethics, such insights can aid these enterprises in navigating their roles as responsible global corporate citizens, ensuring a harmonious balance between economic growth and social welfare.

Results of Patch Testing to Botanicals: Review of the Mayo Clinic Experience Over 2 Decades (1997-2017).

Background: Botanicals are increasingly incorporated into skincare products. Although allergic contact dermatitis due to botanicals is recognized, data describing the prevalence of positive patch tests to botanicals are sparse. Objective: To report the Mayo Clinic experience of patch testing to selected botanical products in the standard, extended standard, fragrance, and plant series. Methods: IRB-approved retrospective study of the Mayo Clinic experience with patch testing to botanicals from 1997 to 2017. Results: In total, 12,169 people were patch tested to botanicals in the standard, extended standard, fragrance, and plant series; 4032 were men and 8137 were women. The mean age of the population tested was 54 (standard deviation 17.7) years. Almost 11% (1320/12,169) of the patch-tested population exhibited positive reactions to at least 1 botanical agent. Myroxylon pereirae resin 25% was the most common positive allergen in the series. Patients who had positive reactions to at least 1 botanical agent were more (19.8%) likely to have a positive reaction to at least 1 additional botanical than those patients who did not have any positive tests. Most patients presented with generalized involvement (334) or involvement of the hands (284) or face (232). Conclusion: Physicians should be aware of the high prevalence of allergic contact dermatitis and patch test positivity associated with botanical products.

Evaluation and improvement of CO2 assisted gravity drainage for enhanced oil production in China

In view of the diversity of petroleum reservoir types, most petroleum reservoirs have very strong heterogeneity in properties. For many water flooding reservoirs, with the continuous water injection process, the effect of enhancing oil recovery begins to deteriorate gradually, and a large amount of remaining oil mainly remains at the top of the reservoir formation, becoming as "attic oil". Under the "double carbon" target, in order to cope with the high demand for oil consumption in China, a new oil exploitation technology, CO2 assisted gravity drainage is explored in this study. Taking four cores with similar porosity and permeability as research objects, laboratory displacement experiments were carried out to verify the effectiveness of CO2 assisted gravity drainage in enhancing oil recovery through different CO2 injection methods and injection rates. Moreover, through the comparison of gas flooding recovery factors under different gas injection rates, it is found that the stable control of gas-oil interface is the key to the successful implementation of CO2 assisted gravity drainage. After that, based on references and numerical simulation, this paper analyzes the technical key points of the successful implementation of this technology, proposes the method of introducing "surfactant + CO2" composite system to regulate the stability of gas-oil interface, and clearly points out the issues to be focused in future researches. The study can provide a useful reference for the field implementation of CO2 assisted gravity drainage, and then promote effective carbon utilization and oil production.

Exploring carbon neutrality potential in the petroluem industry: The role of green monetary policies as motivators

This research conducted a quantitative evaluation of the influence of environmentally focused financial policies on achieving carbon neutrality within China's petroleum industry spanning from 1985 to 2020. Through the application of ARDL (Autoregressive Distributed Lag) analysis, pivotal insights were unveiled. It became evident that green financial strategies significantly bolstered the capacity for achieving carbon neutrality. However, elevated interest rates associated with green loans posed an obstacle to progress. The examination identified a favorable correlation between the adoption of sustainable energy sources and the potential to achieve carbon neutrality, with financial depth playing a constructive role in advancing carbon reduction initiatives. Conversely, investments in conventional petroleum endeavors hindered the pursuit of carbon neutrality. The study advocated for pragmatic policies to expedite the carbon neutrality agenda, such as optimizing interest rates for green loans, enhancing transparency through digitalization of green finance, dedicated funding for advancements in green technologies, and implementing efficient emissions taxes to incentivize and drive carbon reduction efforts.

Financial Profitability Evaluation and Forecasting Using the Deep Learning: A Case of the Chinese Petroleum Industry

Financial Profitability Evaluation and Forecasting Using the Deep Learning: A Case of the Chinese Petroleum Industry

Analysis of the systematic conservation of China's petroleum industrial heritage: a case study and analysis of the petroleum industrial heritage in Daqing

After a century of development, China's petroleum industry has introduced numerous and various petroleum industrial heritage elements, which collectively embody the value and significance of China's petroleum industrial heritage. Currently, all levels of government departments are trying to protect petroleum industrial heritage, but only limited heritage types and elements of the petroleum industry are included in official conservation lists, which is not conducive to the systematic conservation of China's petroleum industrial heritage. To achieve the systematic conservation of China's petroleum industrial heritage, this study introduced a global petroleumscape research method, taking the petroleum industrial heritage of China's Daqing Oil Field as the research object, and conducted a typological and spatiotemporal historical analysis of all the heritage elements in this oilfield. The results revealed that the current conservation of China's petroleum industrial heritage focuses on the industrial remains formed by the flow of petroleum materials but rarely on the remains formed by the flow of petroleum capital. Additionally, some common characteristics were observed in the overall spatiotemporal pattern of the petroleum industrial heritage, and these characteristics are closely related to the spatial distribution of petroleum resources, oilfield development strategy, dimension of urban areas, and urban development mode. Finally, this paper highlights several future research topics on the subsequent systematic conservation of China's petroleum industrial heritage and provides some reference value for the future systematic conservation of China's petroleum industrial heritage.

Patch Testing Results From the Massachusetts General Hospital Occupational and Contact Dermatitis Clinic, 2017-2022.

Background: Patch testing is gold standard for identifying the source of allergic contact dermatitis (ACD). Objective: To report patch testing results from the Massachusetts General Hospital (MGH) Occupational and Contact Dermatitis Clinic from 2017 to 2022. Methods: Retrospective analysis of patients referred to MGH for patch testing, 2017-2022. Results: In total, 1438 patients were included. At least 1 positive patch test (PPT) reaction was observed in 1168 (81.2%) patients and at least 1 relevant PPT reaction was observed in 1087 (75.6%) patients. The most common allergen with a PPT was nickel (21.5%), followed by hydroperoxides of linalool (20.4%) and balsam of Peru (11.5%). Sensitization rates statistically increased over time for propylene glycol and decreased for 12 other allergens (all P values <0.0004). Limitations: Retrospective design, single institution tertiary referral population, and variations in allergens and suppliers across the study period. Conclusion: The field of ACD is constantly evolving. Regular analysis of patch test data is crucial to identify emerging and diminishing contact allergen trends.

Sensitivity Analysis of Mechanical Parameters of Collapse Roof of Carbonate Rock Deep Buried Oilfield

Carbonate rock oilfields account for two-thirds of proven marine carbonate oilfield reserves, which are the primary way to increase future oil and gas energy reserves. Cave collapses occur during the process of oil reservoir development, seriously affecting oil production. In order to reveal the collapse failure mechanism of carbonate karst caves and predict whether the fracture cave type oil reservoir will collapse before drilling, a binary depth reduction method for determining the critical collapse depth of karst caves is proposed based on the Tahe fracture cave type oil reservoir. The sensitivity of karst cave collapses to multiple factors is analyzed, and a prediction formula for the critical collapse depth of karst caves with changes in the deformation modulus, the internal friction angle, and the cohesion is established through multiple regression analysis. By calculating and analyzing the numerical values of a large number of operating conditions under different mechanical parameters, the failure process, failure mode, and the change law of collapse depth during the Tahe oilfield destruction process were obtained. We used the established formula for predicting the collapse depth of karst caves to predict and analyze the actual distribution of karst caves in the Tahe oilfield. The calculation and analysis results showed that in the karst cave failure mode characterized by vertical shear failure, the cohesive force is the most sensitive factor affecting cave collapse, followed by the internal friction angle. The deformation modulus is hardly sensitive to the influence of the karst collapse. Through the geomechanical model test, the result verified the accuracy and reliability of the calculation results. The research results will provide necessary theoretical support for the large-scale safe extraction of deep petroleum resources, increase oil production in China, and have important theoretical significance and engineering application value.

Partial Least Squares-Discriminant Analysis Classification for Patchouli Oil Adulteration Detection by Fourier Transform Infrared Spectroscopy in Combination with Chemometrics.

This study aims to test chemometrically partial least squares-discriminant analysis (PLS-DA) classification models to detect the adulteration of patchouli oil (PO) with gurjun balsam oil (GBO) by utilization of Fourier transform infrared spectroscopy. Unsupervised analysis was tested using the pattern recognition method using the principal component analysis model against the original spectrum at wavenumbers 4000-500 cm-1 and at the fingerprint area (1800-600 cm-1). Model testing was also carried out on the spectrum that had been pre-processed using the standard normal variate, second derivative Savitzky-Golay, and normalization approaches. Variable Y samples used were certified reference material (CRM), PO, GBO, and PO forged with GBO (PGBO) with a counterfeiting ratio of 0.5 (v/v) to 10% (v/v) with an interval of 0.5%. The same treatment was carried out on testing of the PLS-DA model. In pattern recognition tests, the best separation of the original spectrum was obtained at wavenumbers 1800-600 cm-1. The model was further tested on PLS-DA by making assumptions or codes for CRM, PO, GBO, and PGBO as +2, +1, 0, and -1, respectively. The results of the model analysis showed that even at the lowest counterfeiting ratio (0.5%), the presence of counterfeiting material was detected by the PLS-DA model. The RMSEC value is close to zero with a value of 0.22, and the R square is close to 1, which is 0.954. This very significant separation is clearly illustrated in the loading plot and bi-plot due to the contribution of chemical compounds in the GBO that undergo vibration at wavenumbers 603, 786, and 1386 cm-1. Validation of the PLS-DA model was carried out strongly using the PLS model, and it showed that the difference between the calibration concentration and the prediction was very low (average 0.45) with an accuracy percent above 99%. The efficacy of the model is further substantiated by the consistent and precise values of sensitivity and selectivity, obtained from both the training set and test set.

Alkyds with artistic applications based on drying oils, multifunctional polyalcohols and different polybasic acids

AbstractToday's requirements in the art field have challenged researchers to create artistic paintings with attractive appearance and long‐term color stability. Alkyd‐based art mediums have become an important group in the art field, because of their similar characteristics to traditional oils and exceptional drying properties. In this work, high solid alkyd‐based art mediums have been synthesized by the monoglyceride and acidolysis processes. Multifunctional polyols and high unsaturated fatty acid sources were compared and used for alkyd synthesis. The use of a non‐traditional oil of Peruvian origin is proposed. Resins have been characterized according to their physicochemical (acid number, viscosity, color and density) and drying properties. Drying tendencies were verified with the use of quartz crystal microbalance. Also, the behavior of the art mediums mixed with commercial oil paintings and a dry pigment, have also been evaluated. Results indicate that resins containing the polyol with the highest functionality are more viscous and have fewer tendencies to yellowing, while non‐traditional Peruvian oil is the best option for creating light‐colored art mediums. Alkyd mediums prepared by the monoglyceride method gave to oil paintings better characteristics and drying behavior on canvas.

Evaluation of Patch Test Results in Paediatric Patients in a Tertiary Dermatology Clinic.

Allergic contact dermatitis is common in childhood as well as in adulthood. Children could be affected by numerous allergens. Allergen sources could change by region. In this study, we aimed to identify the most common allergens that cause contact sensitivity in paediatric patients in our region to make a standardized patch test series and define the ways of exposure to these allergens. Between June 2013 and January 2021, a total of 61 patients' European baseline series patch test results were evaluated. Among 61 patients, 36 (%59) were female and 25 (%41) were male. The mean age was 10.4 years. Positivity with at least one allergen was present in 39 (64%) cases. The most common allergens with positive reactions were balsam of Peru (BOP) in 11 (18%) patients, nickel in eight (13.1%) patients, and fragrance mix-1 in seven (11.4%) patients. No statically significant difference was found between patch test results and gender (P = 0.109), atopy (P = 0.774), atopic dermatitis (P = 0.662), hobby (P = 0.377) and side of lesions (P = 0.826). However, there was a significant relationship between the duration of complaints and patch test results (P = 0.007). The responsible allergen in paediatric patients may vary especially by region, thus this could be challenging for diagnosis. Therefore, each region should create its own specific standardized paediatric patch tests.

Certificación de la calidad bactericida del aceite Kion (Zingiber officinale) para la exportación al mercado estadounidense

Zingiber officinale Rosc. known as ginger (known as kion in Peru), belonging to the Zingiberaceae family, it is made up of about forty genera. It is an important culinary spice known for its long usefulness as a flavoring agent. The plant is native to warm tropical climates. Apart from culinary uses, ginger and its main components have beneficial medicinal properties, such as a medicine to combat diabetes, obesity, diarrhea, allergies, pain, fever, rheumatoid arthritis, inflammation and various forms of cancer. Tumors induced in the intestine, breast, ovaries, pancreas, liver, and cardiovascular disorders have been effectively treated in animal models with biologically active constituents of ginger. The multiple properties of the essential oil of the ginger rhizome have made Peru a potential export country. For 2011, more than 687 million dollars were collected and imported to more than 152 countries in the world. However, to continue opening doors in the market, it is important to certify your products, which in this work corresponds to ginger oil as a bacteriological agent. In this sense, a Peruvian oil was physicochemically analyzed and its antimicrobial potential against various strains was determined. The results show that ginger oil showed bactericidal activity at all oil concentrations tested, being more effective at high concentrations than low concentrations. According to the halo of action, kion oil presented greater microbial activity against Salmonella aureus, followed by Streptococcus pyogenes and Xanthomonas horturum.

Perilla oil and α-linolenic acid ameliorated thrombosis in rats induced by collagen and epinephrine.

Perilla frutescens is an annual herbaceous plant widely cultivated for oil production in China, Japan, and Korea. In this study, we investigated the effect of perilla oil (PO) on thrombosis induced by collagen and epinephrine (CE) in rats. The oral administration of PO significantly increased prothrombin time (PT) and activated partial thromboplastin time (aPTT) in the blood plasma and inhibited the expression of cells adhesion markers (CAMs) such as intercellular CAM-1 (ICAM-1), vascular CAM (VCAM-1), E-selectin and P-selectin in the aorta tissue. Furthermore, pulmonary occlusion induced by CE in rats was suppressed by PO. α-Linolenic acid (ALA) was quantified at 60.14 ± 2.50g/100g of PO, and its oral administration at the same concentration with that in PO exerted the similar effect on PT, aPTT, ICAM-1, VCAM-1, E-selectin and P-selectin in CE-induced thrombosis rats. Taken together, PO and ALA significantly ameliorated thrombosis by regulating CAMs.

Allergic Contact Dermatitis and Patch Testing in Skin of Color Patients.

Objective: Skin of color patients face important health issues relevant to dermatologists, such as allergic contact dermatitis; however, there is a lack of information surrounding common allergens causing contact dermatitis that disproportionately affect skin of color patients, as well as interpreting patch testing in this population. Methods: Covidence, Embase, MEDLINE, PubMed, Web of Science, and Google Scholar were searched to identify relevant articles studying allergic and irritant contact dermatitis in skin of color patients. Results: The most common positive reactions in African American patients included PPD, balsam of Peru, bacitracin, fragrance mix, and nickel. The most common positive reactions in Hispanic patients included Carba mix, nickel sulfate, and thiuram mix. The most common positive reactions in Asian patients included nickel sulfate, fragrance mix, and potassium dichromate. When interpreting patch test results in patients with higher Fitzpatrick skin types, positive patch tests presented with lichenification and hyperpigmentation, rather than erythema and vesicles. Furthermore, characteristic bright red or pink hues for positive results may appear violaceous or faint pink. Conclusions: Awareness of the common allergens associated with allergic contact dermatitis in patients of skin of color can help guide patch testing as an important diagnostic tool. Further research must be conducted regarding contact dermatitis in this patient population, especially given the relative lack of data surrounding Hispanic, Asian and Pacific Islander, and Native American patients.

Algorithm of local conservative treatment of children with burns

Background. This article presents the results of using atraumatic wound dressings Branolind N and sorbing bandage Zetuvit. In research there were 10 children with superficial scalds (III degree) and parcial deep (IIIII degree) burns. Children were treated at the Burn Center of Speransky Pediatric City Hospital №9 in Moscow in June November 2021. The analysis of the conducted research testifies to the effectiveness and safety of the medical products listed above. The absence of local complications during treatment was revealed. The possibility of their simultaneous use in patients with exudating wounds has been established. Branolind N and Zetuvit bandage can be recommended for use both in a on- and outpatient cases in children with local burns. The results of treatment of children with burn injury depend on adequate diagnosis of the severity of the burn trauma, reliable determination of the depth of scald and local treatment of burn wounds. Tactics of local treatment depends on the phase of wound process, the age of the child and the presence of concomitant diseases.&#x0D; Aim. To assess the effectiveness and safety of using wound dressings ointment dressing Branolind N with Peruvian balsam and Zetuvit sorbent dressing in treatment children with burns.&#x0D; Materials and methods. Analysis of the using of Branolind N ointment dressing with Peruvian balsam and Zetuvit sorbent dressing in 10 children with burn injury was carried out. The study was completed in June November 2021. Inclusion and exclusion criteria were determined by the physicians participating in the study. The studies were carried out in accordance with Helsinki Declaration. The age of the patients ranged from 3 years 2 months up to 17 years 1 month. The depth of burn wounds in the studied patients was assessed according to the classification of the damage degree of European Burn Association: patients with superficial scalds (III degree) and partial deep burns (IIIII degree).&#x0D; Results. The absence of local skin complications during the application of the Branolind N ointment dressing with Peruvian balsam and Zetuvit sorbent dressing was revealed. The possibility of using. These wound dressings in patients with exuding wounds was established.&#x0D; Conclusion. The analysis of the conducted study testifies to the effectiveness and safety of the above medical products. Ointment bandage Branolind N with Peruvian balsam and sorbent bandage Zetuvit can be recommended for use both in out- and inpatients practice of treatment children with local skin burns.

Prospect on the Energy Cooperation between China and Kazakhstan from the Perspective of One Belt, One Road Initiative

Energy cooperation is the key element and the pioneering project in the construction of the Belt and Road economic belt. With abundant gas and oil resource, Central Asia is viewed as the core region of the Silk Road Economic Belt, and the energy cooperation is also the top priority of the economic cooperation between China and other Central Asian countries. This paper describes the actual situation of the oil industry in China and Kazakhstan, introduces the history of the energy cooperation between the two countries, analyzes the challenges hindering the development of the cooperation, and then gives a corresponding prospect. In the context of the Belt and Road initiative, China should insist the attitude of mutual benefit and win-win cooperation, diversify the energy cooperation between the two countries, improve the related policies and institutions, and take advantage of the "Belt and Road" and other platforms such as SCO to deepen Sino-Kazakh oil and gas cooperation so as to achieve the common prosperity.

Systemic contact dermatitis to peanut ingestion

Delayed cutaneous hypersensitivity with ingestion of allergen (a form of systemic contact dermatitis) involves a non-cutaneous exposure to an allergen that has already been sensitized through the cutaneous route.1 The exact mechanism for systemic contact dermatitis remains unclear, but is believed to be mediated by type IV hypersensitivity involving T-cell activation to a hapten. 1 Ingestion of Balsam of Peru and nickel are most frequently implicated in systemic contact dermatitis, with Balsam of Peru commonly found in citrus fruits, tomatoes, and spices, and nickel commonly found in grains, chocolate, and canned foods.

Determination of polychlorinated naphthalenes in soil using accelerated solvent extraction-molecular sieves solid-phase extraction coupled with gas chromatography-tandem mass spectrometry

新污染物引发的环境和健康风险正逐步受到社会各界的广泛关注,我国第十四个五年规划和2035年远景目标纲要明确“重视新污染物治理”。作为新型的持久性有机污染物,多氯萘(PCNs)在土壤中通常处于痕量水平,一般需要经过多层硅胶柱/氧化铝柱等复杂的净化方法,再结合有效的分析手段才能实现准确测定。关注土壤中多氯萘分离分析方法可以为掌握和监管其在土壤中的污染状况提供技术和方法支持。研究以13X分子筛作为固相萃取吸附剂,评价了其对多氯萘的净化效果。研究发现:使用正己烷作为上样溶剂和淋洗剂,10 mL二氯甲烷/正己烷(2∶15, v/v)为洗脱溶剂,可以实现PCNs与脂类大分子等干扰物的选择性分离,且多氯萘内标的平均回收率为56.1%~88.0%。与凝胶渗透色谱法、弗罗里硅土固相萃取柱以及多层硅胶柱/氧化铝柱相比,13X分子筛对土壤提取液的净化效果优于前两种净化方法,可以获得与多层硅胶/氧化铝柱相近的净化效果(53.0%~117.0%),而且操作更加简单,环境更加友好,分析成本大幅度下降。在此基础之上,建立了加速溶剂萃取-分子筛固相萃取,结合气相色谱-三重四极杆质谱法测定土壤中PCNs的分析方法。PCNs同族体的方法检出限为0.009~0.6 ng/g。采用基质加标法评价了本方法的精密度和准确度,CN-3、13、42、46、52、53、73、75在低、中、高加标水平下的平均加标回收率分别为70%~128%、71%~115%和61%~114%,测定结果的相对标准偏差分别为4.2%~23%、6.5%~31%和4.7%~22%,满足痕量分析的要求且平行性较好。从整个分析流程来看,13X分子筛有望成为新污染物净化的新型固相萃取吸附剂,并在土壤新污染物普查中发挥重要作用。