フローインジェクション法による過酸化水素水中の微量リン及び窒素測定のための試料前処理法
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概要
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The sample pretreatment method described is applicable for high sensitivity determination of total phosphorus and total nitrogen in 30% hydrogen peroxide solution, by means of FIA. The tolerable limit of hydrogen peroxide content in samples for the present FIA method to be applied is about 300μg ml^<-1>. Therfore, either diluting a sample or digesting hydrogen peroxide is inevitable. Heating a 10ml of sample at 100℃ for about 90 min with 0.2 g of platinum gauze added as catalyzer is shown to be a practically acceptable digestion procedure for 30% hydrogen peroxide solution containing phosphorus and nitrogen at the level of 100 ng ml^<-1> and 40 ng ml^<-1>, respectively.
- 1990-02-05