Quantitative Determination Of Phenol Research Articles

Simultaneous determination of and in wastewater using near-infrared diffuse reflectance spectroscopy with adsorption preconcentration.

Near-infrared diffuse reflectance spectroscopy (NIRDRS) has been proven to be a convenient and fast quantitative method for complex samples. A method for simultaneous quantitative determination of phenol and p-nitrophenol in wastewater was developed by using NIRDRS with a preconcentration procedure of resin adsorption. In the method, the analytes were firstly adsorbed onto the adsorbent, and then the NIRDRS spectrum of the adsorbent was measured for quantitative analysis by partial least squares (PLS) regression. The results show that the two phenolic compounds can be immobilized onto the adsorbent and directly measured by NIRDRS. The correlation coefficients (R) between the reference values and prediction results for phenol and p-nitrophenol were 0.958 and 0.957, respectively. Furthermore, the interferences of the coexistence components can be eliminated with the aid of multivariate calibration. The method may provide a sensitive, effective and fast way for simultaneous quantitative analysis of phenol and p-nitrophenol in solution samples.

Quantitative determination of phenol in natural decayed leaves using procaine modified carbon paste electrode surface by cyclic voltammetry

In this research, the amount of phenol in decayed leaves was quantified in aqueous medium by using procaine hydrochloride modified carbon paste electrode. Working electrode was prepared by using homogeneous mixture of graphite powder and mineral oil (80:20%). The mixture was pressed on the electrode surface thus a glassy form was obtained. The electrode surface was modified with procaine hydrochloride in 0.1 M tetrabutylammonium tetrafluoroborate using 100 mV s − 1 scanning rate between −1.7 V and −0.5 V with 50 cycles. After the modification process, the electron transfer becomes easier and faster. For the calibration curve, a series of standard phenol solution between 1.0 × 10 − 3 M and 1.0 × 10 − 8 M was prepared using Britton–Robinson buffer solution at pH 12. The prepared standard solutions were used for the chemical binding of phenol to the modified electrode surface between 0.0 V and + 0.9 V potential range using 100 mV s − 1 scanning rate with 10 cycles. Calibration curve was obtained by plotting concentrations versus peak currents of standard phenol solutions. By using this calibration method, the amount of phenol was determined as 8.33 × 10 − 5 M in natural decayed leaves in BR buffer solution at pH 12. Detection limit was obtained as low as 1.0 × 10 − 8 M.

Biosensors for phenol derivatives using biochemical signal amplification

Two different approaches, both exploiting two enzymes cooperative functioning, to enhance the sensitivity of tyrosinase (PPO) based biosensor for amperometric detection of phenols have been compared. For this purpose, one monoenzyme electrode (PPO) and two bienzyme electrodes (PPO and d-glucose dehydrogenase, GDH; PPO and horseradish peroxidase, HRP) were constructed using agar–agar gel as enzyme immobilization matrix. The biosensors responses for l-tyrosine detection were recorded at −50 mV versus saturated calomel electrode (SCE). The highest sensitivity (74 mA M −1) was observed for the PPO–GDH couple, while that recorded for PPO–HRP couple system was only 32 times higher than that measured for monoenzyme electrode (0.01 mA M −1). The ability of the PPO-, PPO–GDH-, PPO–HRP-based biosensors to assay phenols was demonstrated by quantitative determination of phenol, 1,2-dihydroxybenzene, 1,3-dihydroxybenzene, 1,4-dihydroxybenzene, 2-amino-3 (4-hydroxyphenyl) propanoic acid, 2-hydroxytoluene, 3-hydroxytoluene, 4-hydroxytoluene, 4-clorophenol, 3-clorophenol, 2-clorophenol, 4-hydroxybenzoic acid.

Bioprobe electrode for phenol

AbstractA clark oxygen electrode is coated with a thin layer of cell paste of induced trichosporon cutaneum. This bioprode enables one to perform rapid, quantitative determination of phenol in the 0–15 mg/liter range. The assay uses only 2–5 ml and is complete 15 sec after adding the sample. The bioprobe is stable for at least five days at room temperature. It lasts at least 100 assays. Induced yeast cells come from shake cultures or agar plates. They can be freeze‐stored for several weeks before mounting on the electrode. A method of estimating corrections for other exidizable substances is exemplified. The bioprobe can be used to measure phenol in water, fermentation broth, and municipal sewage.

Quantitative Determination of Phenol in Phenolated Calamine Lotion USP

A method for the quantitative analysis of phenol in phenolated calamine lotion USP is described. The method is based on spectrophotometrically measuring the color produced by reacting phenol with either ferric chloride or ferric nitrate. Beer's law is followed. The effect of ferric‐ion concentration on the sensitivity of the assay method is reported.

Quantitative Determination of Phenol in Ointments

A quantitative method for the assay of phenol in ointments is described. The procedure involves the formation of a blue indophenol by reacting phenol with 2,6-dibromoquinone-4-chloroimide which can be measured spectrophotometrically. The method is accurate, and interference from other active ingredients (hydrocortisone and menthol) does not occur.

The quantitative determination of phenols by an anodic oxidation wave using a mercury pool electrode during chromatography

The quantitative determination of phenols by an anodic oxidation wave using a mercury pool electrode during chromatography

Factors influencing the condensation of 4-aminoantipyrine with derivatives of hydroxybenzene—I. A critique

The quantitative determination of phenols in water and waste water is attempted by condensation with 4-aminoantipyrine and oxidation under alkaline conditions to a colored product. The major chemical factors that influence this reaction are pH value between 8.0 and 11.0, the type of aqueous buffer, and the type of substituted phenol. These three factors influence the analytical and molecular sensitivities as well as the wave length of maximum absorbance. A “total phenol” determination is not possible with the 4-aminoantipyrine technique as currently practiced.

Quantitative Determination of Phenol in Cigarette Smoke.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuantitative Determination of Phenol in Cigarette Smoke.A. W. SpearsCite this: Anal. Chem. 1963, 35, 3, 320–322Publication Date (Print):March 1, 1963Publication History Published online1 May 2002Published inissue 1 March 1963https://doi.org/10.1021/ac60196a015RIGHTS & PERMISSIONSArticle Views101Altmetric-Citations24LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (310 KB) Get e-Alerts Get e-Alerts