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KMID : 0385520120250060350
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Analytical Science & Technology
2012 Volume.25 No. 6 p.350 ~ p.363
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Uncertainties of ionic species in snowpit samples determined with ion chromatography system
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Hong Sang-bum
Chung Ji-woong
Hur Soon-Do
Kim Sun-Mee
Hong Sung-min
Kang Nam-goo
Kang Chang-Hee
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Abstract
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To determine ionic species in snowpit samples using ion chromatography system, we described the performance of ion chromatography(IC) system, cleaning method of bottle, and interference by filtering procedure. The limit of detection, reproducibilities, and accuracies determined with BCR®-408 were 0.01- 0.26 μg/L, 0.4-17.4%, 4.5-12.0% for cations and 0.02-0.26 μg/L, 0.1-27.6%, 1.3-5.6% for anions, respectively. Lab blank test for sample bottle indicated that CH3CO2?, HCO2?, and NH4+ can be easily contaminated in the lab environment. The positive interferences of NO3? were partly attributed to the cleaning method of bottle. The filtering of melted snow sample should be carefully applied because it can positively affect the concentration levels of some ionic species. Finally, this method was applied to measure ionic species in snowpit samples from the upward area near NEEM camp and the uncertainties of measurement data of F? were also estimated.
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KEYWORD
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Ion chromatography system, snow, ice, uncertainties of measurement data
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