التفاصيل البيبلوغرافية
| العنوان: |
Rapid measurement of perchlorate in polar ice cores down to sub-ng L levels without pre-concentration. |
| المؤلفون: |
Peterson, Kari, Cole-Dai, Jihong, Brandis, Derek, Cox, Thomas, Splett, Scott |
| المصدر: |
Analytical & Bioanalytical Chemistry; Oct2015, Vol. 407 Issue 26, p7965-7972, 8p |
| مصطلحات موضوعية: |
ICE cores, PERCHLORATE analysis, ION exchange chromatography, ELECTROSPRAY ionization mass spectrometry, TANDEM mass spectrometry |
| مصطلحات جغرافية: |
POLAR regions |
| مستخلص: |
An ion chromatography-electrospray ionization-tandem mass spectrometry (IC-ESI-MS/MS) method has been developed for rapid and accurate measurement of perchlorate in polar snow and ice core samples in which perchlorate concentrations are expected to be as low as 0.1 ng L. Separation of perchlorate from major inorganic species in snow is achieved with an ion chromatography system interfaced to an AB SCIEX triple quadrupole mass spectrometer operating in multiple reaction monitoring mode. Under optimized conditions, the limit of detection and lower limit of quantification without pre-concentration have been determined to be 0.1 and 0.3 ng L, respectively, with a linear dynamic range of 0.3-10.0 ng L in routine measurement. These represent improvements over previously reported methods using similar analytical techniques. The improved method allows fast, accurate, and reproducible perchlorate quantification down to the sub-ng L level and will facilitate perchlorate measurement in the study of natural perchlorate production with polar ice cores in which perchlorate concentrations are anticipated to vary in the low and sub-ng L range. Initial measurements of perchlorate in ice core samples from central Greenland show that typical perchlorate concentrations in snow dated prior to the Industrial Revolution are about 0.8 ng L, while perchlorate concentrations are significantly higher in recent (post-1980) snow, suggesting that anthropogenic sources are a significant contributor to perchlorate in the current environment. [ABSTRACT FROM AUTHOR] |
|
Copyright of Analytical & Bioanalytical Chemistry is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Find this article in full text from Springer Verlag. 
Full Text Finder