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The Validation Study of Auto Anlysis Method Combined with Aqua Regia Digestion for Fluorine of Soil  

Na, Kyung-Ho (Gyeonggido Institute of Health & Environment)
Yun, In-Chul (BLTEC Korea Limited)
Lee, Jung-Bok (Gyeonggido Institute of Health & Environment)
Publication Information
Journal of Soil and Groundwater Environment / v.15, no.5, 2010 , pp. 8-15 More about this Journal
Abstract
The purpose of this research is to check the validation of an auto-analysis method combined with aqua regia digestion apparatus for improvement of water distillation method used as a fluorine test of soil. Fluorine contents of CaO used in the pretreatment course of water distillation method were 120 mg/kg ~ 5,064 mg/kg at the blank test, which was exceeded up to maximum 12.5 times of the soil standard, so it was estimated due to a effect of fluorine existing as impurities of CaO. The recovery test of the same samples indicated that water distillation method and auto-analysis method were 134.5mg/kg and 161.7mg/kg respectively, the recovery ratio of the latter was 16.8% higher than the formal. The validation test of two methods satisfied the standard, but auto analysis method was excellent more than distillation method. Also, auto analysis method could save a analysis time up to maximum 4.7 times by comparison with water distillation method.
Keywords
Fluorine of soil; Water distillation method; Automatic analysis method; Validation; Uncertainty;
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