Atrazine desethyl

Manufactured by Merck Group

Sourced in Sao Tome and Principe, Spain

Atrazine-desethyl is a laboratory analytical standard used for the identification and quantification of atrazine-desethyl, a metabolite of the herbicide atrazine, in various environmental and biological samples. It is employed in analytical techniques such as chromatography and mass spectrometry to support environmental monitoring and research.

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Atrazine (76 citations)

4 protocols using atrazine desethyl

Quantitative Analysis of Preservatives

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Methylisothiazolinone (≥98%, CAS# [Chemical Abstracts Service] 2682–20-4), BIT (96%, CAS# 2634–33-5), OIT (99.9%, CAS# 26530–20-1), atrazine-desethyl (99%, CAS# 6190–65-4, used as internal standard [IS]), and trichloroethylene were obtained from Sigma-Aldrich Inc (Millipore Sigma, St Louis, MO). Methylchloroisothiazolinone/MI (67.7% MCI, CAS# 26172–55-4) was obtained from Combi-Block, Inc (San Diego, CA), and BBIT (95%, CAS# 4299–07-4) was purchased from Creative Dynamics Inc (BOC Science, Shirley, NY). The MCI standard was a mixture of MCI and MI at a ratio of MCI/MI = 2/1 in H₂O. The mixture by ultrahigh-performance liquid chromatographic–mass spectrometry (UHPLC-MS) was found to contain only MCI and MI. The standard MI (≥98%) was used to determine the exact MI concentration in the mixture and then calculate the MCI concentration in that standard. Acetonitrile (LC/MS grade), methanol (high-performance liquid chromatographic grade), and formic acid (LC/MS grade) were purchased from Fisher Chemical Inc (Battle Ground, WA). Water was made by Milli-Q (Millipore Sigma, Burlington, MA).

Goodier M.C., Zang L.Y., Siegel P.D, & Warshaw E.M. (2019). Isothiazolinone Content of US Consumer Adhesives: Ultrahigh-Performance Liquid Chromatographic Mass Spectrometry Analysis. Dermatitis : contact, atopic, occupational, drug, 30(2), 129-134.

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Quantification of Preservatives in Aqueous Mixtures

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Methylisothiazolinone (≥98%, CAS# 2682-20-4), BIT (96%, CAS# 2634-33-5), OIT (99.9%, CAS# 26530-20-1), atrazine-desethyl (99%, CAS# 6190-65-4, used as internal standard [IS]), and trichloroethylene were obtained from Sigma-Aldrich, Inc. (Millipore Sigma, St. Louis, MO). Methylchloroisothiazolinone (68%, CAS# 26172-55-4) obtained from Combi-Block, Inc. (San Diego, CA) is an aq mixture of MCI and MI at a ratio of MCI/MI (2/1), which was checked by MS method, and no contaminants were found. We used standard MI (≥98%) to calibrate (MI) in the mixture and then calculated (MCI) in the mixture. Butyl-BIT (95%, CAS# 4299-07-4) was purchased from Creative Dynamics, Inc. (BOC Science, Shirley, NY). Acetonitrile (LC/MS grade), methanol (HPLC grade), and formic acid (LC/MS grade) were purchased from Fisher Chemical, Inc. (Battle Ground, WA). Water was made by Milli-Q (Milipore Sigma, Burlington, MA).

Kimyon R.S., Zang L.Y., Siegel P.D., Voller L.M., Schlarbaum J.P, & Warshaw E.M. (2021). Isothiazolinone Detection in Dish Soap and Personal Care Products: Comparison of Lovibond Isothiazolinone Test Kit and Ultrahigh-Performance Liquid Chromatography–Tandem Mass Spectrometry. Dermatitis : contact, atopic, occupational, drug, 32(4), 245-250.

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Analytical Method for Preservatives

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Methylisothiazolinone (≥98%, CAS# 2682–20-4), BIT (96%, CAS# 2634–33-5), OIT (99.9%, CAS# 26530–20-1), atrazine-desethyl (99%, CAS# 6190–65-5, used as an internal standard), and trichloroethylene were obtained from Sigma-Aldrich Inc (Millipore Sigma, St Louis, MO). Methylchloroisothiazolinone (67.7%, CAS# 26172–55-4) was obtained from Combi-Block, Inc (San Diego, CA), and BBIT (95%, CAS# 4299–07-4) was purchased from Creative Dynamics Inc (BOC Science, Shirley, NY). Acetonitrile (liquid chromatography/tandem MS [LC/MS] grade), methanol (HPLC grade), and formic acid (LC/MS grade) were purchased from Fisher Chemical Inc (Battle Ground, WA). Water was made by Milli-Q (Milipore Sigma, Burlington, MA).

Goodier M.C., Siegel P.D., Zang L.Y, & Warshaw E.M. (2018). Isothiazolinone in Residential Interior Wall Paint: A High-Performance Liquid Chromatographic-Mass Spectrometry Analysis. Dermatitis : contact, atopic, occupational, drug, 29(6), 332-338.

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Pesticide Standards Preparation and Characterization

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Atrazine, Atrazine-desethyl (DEA), Atrazine-desisopropyl (DIA), bromacil, carbendazim, chlorpyrifos, diuron, imazalil, linuron, metolachlor, prometryn, simazine, terbumeton, terbumeton-desethyl (TED) , terbuthylazine, terbuthylazine-desethyl (TD), terbutryn, thiabendazole, 3,4-dichloroaniline (3,4-DCA), 3,5,6-trichloro-2-pyridinol (TCP) were purchased from Sigma-Aldrich (Madrid, Spain), with a purity higher than 97%. The list of pesticides and TPs available for this study, as well as some physicochemical properties, are listed in Supplementary Material (Table SM1).
HPLC-grade methanol (MeOH), acetone (pesticide residue analysis quality) and formic acid (98-100%, LC-MS grade), were supplied by Scharlau S.L (Barcelona, Spain).
HPLC-grade water (resistivity of 18 MΩ cm) was obtained by purifying demineralised water (Millipore Ltd., Bedford, MA, USA).
Standard stock solutions (500 mg L -1 ) of each compound (except carbendazim) were prepared by dissolving 25 mg (±0.01 mg) of each solid compound in 50 mL of acetone considering the purity of each solid standard. Standard stock solution of carbendazim was prepared in MeOH. Individual stock solutions and working standard solutions were stored at -20 and 4℃ in the dark, respectively.

Fonseca E., Renau-Pruñonosa A., Ibáñez M., Gracia-Lor E., Estrela T., Jiménez S., Pérez-Martín M.Á., González F., Hernández F, & Morell I. (2019). Investigation of pesticides and their transformation products in the Júcar River Hydrographical Basin (Spain) by wide-scope high-resolution mass spectrometry screening. Environmental research, 177.

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