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Interactions of sodium azide with triazine herbicides: effect on sorption to soils.
Chemosphere. 2006 Oct; 65(2):352-7.C

Abstract

Sodium azide (NaN(3)) is one of the biocides commonly used to inhibit microbial growth during sorption experiments. However, a few reports have suggested that NaN(3) can react with the analyte of interest. In this study, the interactions of NaN(3) with triazine herbicides were investigated and the effect of atrazine transformation on its sorption to soil was evaluated. The concentration of atrazine in the presence of NaN(3) decreased significantly over period of time. After 14 days, only 38% of the initial atrazine concentration (10 mg l(-1)) was detected in a solution containing 1,000 mg l(-1) NaN(3) at pH 5.5. The magnitude and the rate of atrazine transformation increased with increase in NaN(3) load and with decrease in pH. In contrast to atrazine behavior, the concentrations of prometon and ametryn did not change during the experiment. GC/MS analysis indicated that the chlorine atom of atrazine is replaced by the azide group yielding 2-azido-4-(ethylamino)-6-(isopropylamino)-s-triazine. Atrazine transformation by NaN(3) significantly affected sorption of herbicide to soil. The presence of NaN(3) affects indirectly the sorption of atrazine due to competitive effect of its derivative. Our results demonstrated that the application of NaN(3) as a biocide in sorption-desorption experiments must be carefully evaluated. This issue is vital for sorption experiments conducted over long periods of time or/and with concentration of NaN(3) higher than 100 mg l(-1).

Authors+Show Affiliations

Department of Soil and Water Sciences, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel. chefetz@agri.huji.ac.ilNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16630643

Citation

Chefetz, Benny, et al. "Interactions of Sodium Azide With Triazine Herbicides: Effect On Sorption to Soils." Chemosphere, vol. 65, no. 2, 2006, pp. 352-7.
Chefetz B, Stimler K, Shechter M, et al. Interactions of sodium azide with triazine herbicides: effect on sorption to soils. Chemosphere. 2006;65(2):352-7.
Chefetz, B., Stimler, K., Shechter, M., & Drori, Y. (2006). Interactions of sodium azide with triazine herbicides: effect on sorption to soils. Chemosphere, 65(2), 352-7.
Chefetz B, et al. Interactions of Sodium Azide With Triazine Herbicides: Effect On Sorption to Soils. Chemosphere. 2006;65(2):352-7. PubMed PMID: 16630643.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Interactions of sodium azide with triazine herbicides: effect on sorption to soils. AU - Chefetz,Benny, AU - Stimler,Keren, AU - Shechter,Michal, AU - Drori,Yaron, Y1 - 2006/04/21/ PY - 2006/01/05/received PY - 2006/03/05/revised PY - 2006/03/06/accepted PY - 2006/4/25/pubmed PY - 2006/12/9/medline PY - 2006/4/25/entrez SP - 352 EP - 7 JF - Chemosphere JO - Chemosphere VL - 65 IS - 2 N2 - Sodium azide (NaN(3)) is one of the biocides commonly used to inhibit microbial growth during sorption experiments. However, a few reports have suggested that NaN(3) can react with the analyte of interest. In this study, the interactions of NaN(3) with triazine herbicides were investigated and the effect of atrazine transformation on its sorption to soil was evaluated. The concentration of atrazine in the presence of NaN(3) decreased significantly over period of time. After 14 days, only 38% of the initial atrazine concentration (10 mg l(-1)) was detected in a solution containing 1,000 mg l(-1) NaN(3) at pH 5.5. The magnitude and the rate of atrazine transformation increased with increase in NaN(3) load and with decrease in pH. In contrast to atrazine behavior, the concentrations of prometon and ametryn did not change during the experiment. GC/MS analysis indicated that the chlorine atom of atrazine is replaced by the azide group yielding 2-azido-4-(ethylamino)-6-(isopropylamino)-s-triazine. Atrazine transformation by NaN(3) significantly affected sorption of herbicide to soil. The presence of NaN(3) affects indirectly the sorption of atrazine due to competitive effect of its derivative. Our results demonstrated that the application of NaN(3) as a biocide in sorption-desorption experiments must be carefully evaluated. This issue is vital for sorption experiments conducted over long periods of time or/and with concentration of NaN(3) higher than 100 mg l(-1). SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/16630643/Interactions_of_sodium_azide_with_triazine_herbicides:_effect_on_sorption_to_soils_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(06)00283-9 DB - PRIME DP - Unbound Medicine ER -