کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1181841 1491611 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simultaneous Determination of Chlorofluorocarbons and Sulfur Hexafluoride in Seawater Based on a Purge and Trap Gas Chromatographic System
ترجمه فارسی عنوان
تعیین همزمان کلروفلوئوروکربن ها و هگزافلورید سولفات در آب دریا با استفاده از سیستم کروماتوگرافی گاز خرد و گریز
کلمات کلیدی
هگزافلورید سولفوریک، کلروفلوئوروکربن ها، تمیز کردن و تله، کروماتوگرافی گازی، آب دریا
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی

Chlorofluorocarbons (CFCs) and sulfur hexafluoride (SF6) are types of anthropogenic halogenated compounds, and are very important for ocean processes, including air-sea and water mass exchanges. Meanwhile, they can also be used to calculate some key physical and biogeochemical parameters such as the apparent oxygen utilization rate and anthropogenic CO2. Compared to CFCs, SF6 is quite difficult to measure in seawater due to its low solubility. However, it is useful to study the ocean processes based on both CFCs and SF6. In this study, a purge and trap gas chromatography system was developed to simultaneously measure CFC-12 and SF6 in seawater. The optimal conditions were as follows: trap temperature of −70 °C, purge time of 8 min, purge gas pressure of 310 kPa, desorption time of 30 s, desorption temperature of 90 °C. The method was simple and sensitive. The detection limit were 0.02 pmol kg−1 for CFC-12 and 0.03 fmol kg−1 for SF6. The analytical precision of CFC-12 was ±1.2% and that of SF6 was ±0.5%. The correlation coefficient (R2) values of all calibration curves were greater than 0.9995. This method was successfully used in the analysis of sea water samples collected during the 6th Chinese Arctic Research Expedition.

CAI et al developed a purge and trap gas chromatography system to measure the CFC-12 and SF6 simultaneously in seawater. This method was successfully used in the analysis of the samples collected during 6th Chinese Arctic Research Expedition. The system has a good performance.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Journal of Analytical Chemistry - Volume 44, Issue 7, July 2016, Pages 1003–1008
نویسندگان
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