کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1227500 1494867 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Application of flow injection–green chemical vapor generation–atomic fluorescence spectrometry to ultrasensitive mercury speciation analysis of water and biological samples
ترجمه فارسی عنوان
کاربرد جریان تزریق بخار شیمیایی تولید اسپکترومتری فلورسانس اتمی به تجزیه و تحلیل نمونه های آب و بیولوژیکی حساس به حساسیت جیوه
کلمات کلیدی
جیوه، تولید بخار عکس، تولید بخار التراسونیک، تجزیه و تحلیل ویژه طیف سنجی فلورسانس اتمی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• Photochemical or ultrasonic vapor generation generates Hg0 from total mercury or inorganic Hg2 +.
• Flow injection–vapor generation–atomic fluorescence spectrometry mode was adapted.
• Ultrasensitive and matrix interference-free analysis was achieved.
• Water and fish samples were successfully analyzed for trace mercury species.

A simple, non-chromatographic and green method based on flow injection UV photochemical or ultrasonic vapor generation atomic fluorescence spectrometry (AFS) was developed for the determination and speciation analysis of mercury. Mercury cold vapor (Hg0) was generated by using only formic acid and UV or ultrasonic irradiation, and was subsequently detected by AFS. Both mercury (Hg2 +) and methyl mercury (MeHg) can be converted to Hg0 for the determination of total mercury with UV irradiation, while only Hg2 + can be reduced to Hg0 with ultrasonic irradiation, thus determining only Hg2 +. Then, the concentration of MeHg can be calculated by subtracting the Hg2 + concentration from the total mercury concentration. The optimal conditions for the best cold vapor generation efficiencies are discussed in detail, together with interference from transition metals. This new speciation analysis not only provides high sensitivity for the determination of mercury species but further eliminates the use of toxic reducing reagents and avoids potential destruction of analyte species that occur in chromatographic separation. Moreover, a simpler and less toxic Hg2 + standard series can be used for the calibration of both Hg2 + and MeHg. The limit of detection is 0.005 or 0.01 μg L− 1 for total mercury with the UV or inorganic mercury with the ultrasonic irradiation, respectively. This method was successfully applied to ultrasensitive mercury speciation analysis of water and biological samples.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microchemical Journal - Volume 127, July 2016, Pages 62–67
نویسندگان
, , , , ,