Abstract
Introduction. Heavy metals are included in one of the significant groups of ecotoxicants. Determining heavy metals at low levels is one of the main problems in analytical chemistry, which depends on various factors. Ignoring the contribution of these factors to the total uncertainty can increase the probability of distortion of the results due to an erroneous decision on the compliance of the obtained data with a particular standard. The most significant influences include the purity of reagents, dishes, and air in laboratory rooms. Purpose of the work. Search for ways of reducing the listed influences provided that the expense of time, material and labour resources are minimized. Materials and methods. In the course of the work, many experiments were carried out, including the analysis of nitric acid for the content of metals before and after cleaning by distillation, the analysis of washes from new fluoroplastic laboratory glassware and glassware that had been cleaned by steaming, an assessment of the effect of air pollution in the laboratory room based on a study of calibration curves, which were constructed at the analysis of standard iron solutions prepared in the Clean Workplace and in a conventional fume hood. All measurements were performed by inductively coupled plasma mass spectrometry on Agilent 7800 ICP-MS mass spectrometer. Results. The efficiency of the proposed methods for eliminating interfering influences on the analysis has been experimentally proved. Conclusion. The technical and analytical problem, which consists of finding optimal conditions for preparation of reagents, glassware cleaning and decreasing the influence of laboratory air pollution, allows to increase reliability of the obtained results and prevent distortion of information about the observed degree of environmental pollution.
Highlights
Heavy metals are included in one of the significant groups of ecotoxicants
In the course of the work, many experiments were carried out, including the analysis of nitric acid for the content of metals before and after cleaning by distillation, the analysis of washes from new fluoroplastic laboratory glassware and glassware that had been cleaned by steaming, an assessment of the effect of air pollution in the laboratory room based on a study of calibration curves, which were constructed at the analysis of standard iron solutions prepared in the Clean Workplace and in a conventional fume hood
All measurements were performed by inductively coupled plasma mass spectrometry on Agilent 7800 ICP-MS mass spectrometer
Summary
Обеспечение условий повышения достоверности следового анализа металлов-токсикантов. Введение. В ходе работы был выполнен ряд экспериментов, включающих анализ азотной кислоты на содержание металлов до и после очистки методом перегонки, анализ смывов с новой фторопластовой лабораторной посуды и посуды, подвергшейся очистке пропариванием, оценку влияния загрязнения воздуха лабораторного помещения на основании исследования градуировочных зависимостей, построенных при анализе стандартных растворов железа, приготовленных в «Чистом рабочем месте» и обычном вытяжном шкафу. Решение технической и аналитической задачи поиска оптимальных условий подготовки реактивов, посуды и самого лабораторного помещения помимо снижения материальных и временных затрат позволяет решить главную задачу – повысить достоверность получаемых результатов и не допустить искажения информации о реально наблюдаемой степени загрязнения среды обитания при проведении измерений следовых количеств металлов-токсикантов. Ключевые слова: тяжёлые металлы; очистка посуды; «чистые помещения»; очистка кислот методом перегонки; атомная спектрометрия; массспектрометрия с индуктивно связанной плазмой. – сбор и обработка материала, статистическая обработка, написание текста, сбор данных литературы; Богданова Ю.Ю. Provision conditions for increasing the reliability of trace analysis of toxic metals
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
