November 2017, № 12 (212), pages 102–105

doi: 10.25198/1814-6457-212-102

Sviridova Т.G., Salnikova Е.V., Romanenko N.A., Kanygina O.N. CONCENTRATION OF ORGANOCHLORINE PESTICIDES ON THE SURFACE OF C₁₈-HYBRID SILICA GEL FOR SAMPLE PREPARATION IN WATER QUALITY CONTROL METHODSThe solid-phase microconcentration of organochlorine pesticides (alpha-hexachlorocyclohexan (α-HСН), gamma-hexachlorocyclohexan (γ-HСН) and a 4.4-dichlordifeniltrikhloretan (4.4-DDT) on the surface of the sorbent C₁₈-hybrid silica gel, is an alternative to the classical method of preparing water samples for gas chromatographic analysis on the separation of two liquid phases. The need for a transition to solid-phase extraction of samples is dictated by the fact that this modern method significantly saves the sample preparation time, reduces the number of races of walking materials several times, and also avoids secondary contamination of samples. The degree of extraction of pesticides from water samples was analyzed in static and dynamic conditions. The conditions of sorption extraction were optimized by varying the type of desorbent solution and the contact time of the phases. As a result, it was shown that the nature of the desorbent had no significant effect on the time to achieve sorption equilibrium, but an increase in the extraction rates of organic pesticides with an increase in the volume fraction of acetone in n-hexane was observed. In addition, it was found that the degree of recovery of 4.4-DDT in all variants of the experiment was lower in comparison with α-HСН and γ-HСН in similar conditions. The use of dynamic mode with the use of the semi-automatic microsyringe SGE-Chromatec eVoL^XR made it possible to slightly increase the recovery of all organochlorine pesticides used in comparison with the corresponding experiments in the static regime. In general, the results confirm the possibility of switching to this method of preparation of water samples for analytical control over the content of the examined organochlorine pesticides in the samples, and the calculated characteristics of the extraction rates make it possible to carry out the studies without losing the quality of the analysis.Key words: оrganochlorine pesticides, hexachlorocyclohexan, dichlorodiphenyltrichloromethylmethane, C₁₈-hybrid silica gel, concentration, sorption, desorption, microextraction by packed sorbent.

Download

References:

1. Ejobi F., Kanja L.W., Kyule M.N., Muller P., Kruger J. Organochlorine pesticide // Residues in Cow’s Milk in Uganda. — 1996. — V. 7. — P. 551-557.

2. Nair A., Mandapati R., Dureja P., Pillai M.K.K. DDT and HCH load in mothers and their infants in Delhi, India // Bull Environ Contam Toxicol. — 1996. — V. 56. — P. 58-64.

3. Ganiev M. M., Nedorezkov V. D. Himicheskie sredstva zashchity rastenij — M. : Kolos, 2006. — 248 р.

4. Abou-Arab A.A.K., Abou-Donia M.A. Pesticide residues in some Egyptian spices and medicinal plants as affected by processing // Food Chem. — 2001. — V. 72. — №4 — P. 439-445.

5. Fedorov, L. A. Pesticidy — toksicheskij udar po biosfere i cheloveku. — M. : Nauka, 1999. — 461 р.

6. GN 1.1.546-96. Gigiena, toksikologiya, sanitariya. Gigienicheskie normativy soderzhaniya pesticidov v ob”ektah okruzhayushchej sredy (perechen'). — M. : Goskomsanehpidemnadzor Rossii, 1997. — P. 4.

7. GOST R 51209-98. Voda pit'evaya. Metod opredeleniya soderzhaniya hlororganicheskih pesticidov gazozhidkostnoj hromatografiej. — M. : Standartform, 2014.

8. GOST R 54503-2011. Voda. Metody opredeleniya soderzhaniya polihlorirovannyh bifenilov. — M. : Standartform, 2013.

9. Metody analiza toksikantov v pishchevyh produktah. Analit. obzory // RAN i dr. Novosibirsk. Ekologiya. — 1993. — № 27. — P. 116.

10. Laaks J., Jochmann M.A., Schmidt T.C. Solvent-free microextraction techniques in gas chromatography // Anal. Bioanal. Chem. — 2012. — V. 402. — P. 565-571.

11. Abdel-Rehim M. Microextraction by packed sorbent (MEPS): A tutorial // Anal. Chim. Acta. — 2011. — V. 701. — P. 119-128.

12. Mendes B., Goncalves J., Câmara J.S. Effectiveness of high-throughput miniaturized sorbent and solid phase microextraction techniques combined with gas chromatography-mass spectrometry analysis for a rapid screening of volatile and semi-volatile composition of wines-a comparative study // Talanta. — 2012. — V. 88. — P. 79-94.

13 Moreno I.E.D., Fonseca B.M., Magalhães A.R., Geraldes V.S., Queiroz J.A., Barroso M., et al. Rapid determination of piperazine-type stimulants in human urine by microextraction in packed sorbent after method optimization using a multivariate approach // J. Chromatogr. — 2012. — V. 1222. — P. 116-120.

14. Sánchez M.D.N., Sappó C.P., Pavón J.L.P., Cordero B.M. A method based on microextraction by packed sorbent-programmed temperature vaporizer-fast gas chromatography-mass spectrometry for the determination of aromatic amines in environmental water samples // Anal. Bioanal. Chem. — 2012. — V. 404. — P. 2007-2015.

15. Bagheri H., Ayazi Z., Aghakhani A., Alipour N. Polypyrrole/polyamide electrospun-based sorbent for microextraction in packed syringe of organophosphorous pesticides from aquatic samples // J. Sep. Sci. — 2012. — V. 35. — P. 114-120.

About this article

Authors: Salnikova E.V., Sviridova T.G., Romanenko N.A., Kanygina O.N.

Year: 2017

doi: 10.25198/1814-6457-212-102

Editor-in-chief

Sergey Aleksandrovich
MIROSHNIKOV

© Электронное периодическое издание: ВЕСТНИК ОГУ on-line (VESTNIK OSU on-line), ISSN on-line 1814-6465
Зарегистрировано в Федеральной службе по надзору в сфере связи, информационных технологий и массовых коммуникаций
Свидетельство о регистрации СМИ: Эл № ФС77-37678 от 29 сентября 2009 г.
Учредитель: Оренбургский государственный университет (ОГУ)
Главный редактор: С.А. Мирошников
Адрес редакции: 460018, г. Оренбург, проспект Победы, д. 13, к. 2335
Тел./факс: (3532)37-27-78 E-mail: vestnik@mail.osu.ru