フローインジェクション法による排水中の全リンの自動測定システム
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概要
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A flow injection analysis system was devised for the continuous determination of total phosphorus. Into a steady stream of persulfate solution at a rate of 1.2 ml/min, a 310μl of sample was injected and digested in the stream by heating to 120℃. The sample was then merged with a stream of acidic molybdate reagent at a rate of 0.2 ml/min and heated at 75℃ to produce molybdophosphate blue. The absorbance of the blue complex was measured at 880 nm. The determination range was 0.01〜10 mg P/l. The sampling rate was 10 samples per hour. The precision of the method was 0.7 % as standard deviation. Total phosphorus in several waste water samples was analyzed by both the flow injection method proposed here and the conventional manual method, and good agreement on the results was observed between the two. The automated method would be applicable to continuous monitoring of total phosphorus in industrial waste waters etc.
- 社団法人日本分析化学会の論文
- 1984-12-05