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METHOD FOR MEASURING THIN ARSENIC CONCENTRATION UNDER EXISTENCE OF PHOSPHORIC ACID AND SILICA ION
METHOD FOR MEASURING THIN ARSENIC CONCENTRATION UNDER EXISTENCE OF PHOSPHORIC ACID AND SILICA ION
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机译:磷酸和硅离子存在下稀薄砷浓度的测定方法
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摘要
PROBLEM TO BE SOLVED: To detect arsenic with low concentration which may be contained in mining waste water, etc. in a short time.;SOLUTION: A method for measuring thin arsenic concentration in a sample liquid in which phosphoric acid and a silica ion exist, based on flow injection analysis using ammonium molybdate consists of: a first step of reacting the sample with an oxidant or a reductant; and a second step of reacting the reacted sample with a coloring agent. The reaction temperature with the coloring agent is about 70°C, and the reaction time is about 1.4 minutes. The sample liquid, a standard liquid, an oxidant solution, and a reductant solution are carried to a duct for measurement by a carrier (water), and sodium dodecyl sulfate is dissolved and added to a coloring agent solution and the carrier.;COPYRIGHT: (C)2012,JPO&INPIT
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