با همکاری انجمن‏‌ بیماری شناسی گیاهی ایران

نوع مقاله : مدیریت آفات و بیماری‌های گیاهی

نویسندگان

بخش تحقیقات آفتکشها، موسسه تحقیقات گیاه پزشکی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی

چکیده

سمیت ناخالصی‌های یک آفت‌کش حتی در غلظت‌های بسیار اندک، در برخی موارد ممکن است معادل ماده مؤثره آفت‌کش یا بیشتر از آن باشد. این سمیت می‌تواند برای مصرف کننده محصولات کشاورزی و همچنین محیط زیست خطرناک باشد. بنابراین کنترل این ناخالصی‌ها در تکنیکال آفت‌کش‌ها بسیار مهم است. بر این اساس در این تحقیق درصد خلوص تکنیکال کلرپایریفوس و همچنین میزان دو ناخالصی مهم آن شامل سولفوتپ و 3 و5 و6- تری کلروپیریدینول یا TCP بررسی شد. بدین‌منظور از تکنیکال‌ کلرپایریفوس متعلق به  31 شرکت‌ فرمولاتور به‌صورت تصادفی نمونه برداری و آنالیز شد. برای آنالیز از دستگاه LC-MS/MS مجهز به آنالایزر چهار قطبی سه گانه استفاده شد.‏ نتایج نشان داد، 4/6 درصد از نمونه­های تکنیکال حاوی ماده مؤثره کمتر از مقدار حد مجاز بودند. در 7/9 درصد از نمونه­ها مقدار سولفوتپ بیشتر از مقدار مجاز توصیه شده FAO بود و در بیش از 2/32 درصد از نمونه­ها مقدار TCP بیشتر از حد مجاز بود. نتایج این تحقیق نشان داد تأمین تکنیکال آفتکش‌ها از منابع معتبر و بررسی میزان ناخالصی‌ها آن‌ها یک ضرورت اجتناب ناپذیر بوده و باید در مراحل کنترل کیفی آنها مورد توجه جدی قرار گیرد.
 

کلیدواژه‌ها

عنوان مقاله [English]

Simultaneous determination of chlorpyrifos and its major impurities sulfotep and 3,5,6-trichloropyridinol in the technicals of different companies by liquid chromatograph

نویسندگان [English]

  • Vahideh Mahdavi
  • Ahmad Heidari

pesticide research department, Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO),

چکیده [English]

Impurities of a pesticide, even in very small concentrations, is toxic and in some cases may be equivalent or greater than the active ingredient of the pesticide. This toxicity can be dangerous for the consumer of agricultural products as well as the environment. So, in this study, the purity percentage of chlorpyrifos as well as the amount of its two important impurities sulfotep and 3, 5, 6-trichloropyridinol (TCP) were evaluated in their technicals. The technical samples of 31 formulation companies in Iran were randomly sampled and analyzed by LC-MS/MS instrument equipped with a triple quadrupole analyzer. The results showed that 6.4% of the technical samples contained the active ingredient less than the standard limit. In 9.7% of the samples the amount of sulfotep was higher than the value recommended by FAO. The amount of TCP was higher than the standard level in 32.2% of the samples. The results of this study showed that reliable sources of the pesticide technical supplies and the evaluation of their impurities are inevitable necessities and should be given serious attention in their quality control stages.
 

کلیدواژه‌ها [English]

  • 3
  • 5
  • 6-trichloropyridinol (TCP)
  • chlorpyrifos
  • mass spectrometry
  • sulfotep
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