کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6391544 1628414 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
New practical approach for using an analyte protectant for priming in routine gas chromatographic analysis
ترجمه فارسی عنوان
روش جدید عملی برای استفاده از یک محافظ کننده آنالایزر برای آغاز کردن در تجزیه و تحلیل کروماتوگرافی گاز روزانه
کلمات کلیدی
آنتی بادی اثر ماتریکس، تجزیه و تحلیل باقی مانده های آفت کش، کروماتوگرافی گازی، طیف سنجی جرم دو طرفه،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش تغذیه
چکیده انگلیسی


- New approach of using analyte protectant has been developed for routine works.
- A priming effect of analyte protectant helps to compensate matrix effect in GC.
- One vial of analyte protectant was used before batch analysis of pesticide residue.

A new practical approach of using an analyte protectant (AP) for priming a gas chromatography (GC) system has been investigated for routine pesticide residue analysis. Matrix co-extractives are known to cause signal improvement, called the “matrix-induced chromatographic response enhancement effect”. APs are known to provide advantages of signal enhancement independent of the matrix, but it takes time in routine applications to follow the common approach of adding APs to every extract. It is faster and easier to compensate for matrix effects by injecting an AP solution to coat active sites in the GC system at the beginning of the analytical sequence. In this study, 100 pesticides in highly pigmented QuEChERS extracts of chili were evaluated in the AP priming approach using GC-tandem mass spectrometry (MS/MS) over the course of many injections. The AP priming approach presented significantly more consistent results (87% of pesticides met RSD criteria) compared with injection sequences without the use of APs (42% of pesticides met RSD criteria). Also, AP priming with 300 ng d-sorbitol was found to display a similar trend to mixed AP in priming effect. We demonstrated that this approach is fit-for-purpose in routine analysis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Control - Volume 48, February 2015, Pages 25-32
نویسندگان
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