試料中のモリブデンを利用したモリブデン中のリンとヒ素の吸光光度定量

概要

論文の詳細を見る
A method for the spectrophotometric determination of phosphorus and arsenic in metallic molybdenum was investigated by the use of hydrazine sulfate for the reduction of heteropoly acid of phosphorus or arsenic which was formed in a sulfuric acid solution with molybdenum present in a sample. Silicon was removed by the usual procedure. Appropriate amounts of the solution corresponding to (80〜100) mg of molybdenum were transferred to a 100 ml volumetric flask To the solution, 20 ml of water, 4 ml of sulfuric acid (1+1) and 2.5 ml of 0.15% hydrazine sulfate solution were added, and then diluted to about 50 ml. The flask was warmed in a boiling water bath for (15〜20) minutes. The content was cooled, and made up to 100 ml with water. The absorbance of the solution was measured at 825 nm against reagent by the use of 1-cm cell, so that the absorbance of phosphorus plus arsenic was measured. The determination of phosphorus was carried out in the same way as above, after arsenic was removed by usual procedure. The content of arsenic was estimated by the difference between the absorbance of phosphorus plus arsenic and that of phosphorus. This method was successfully applied to samples. The variation coefficient of eight de derminations were 0.98% for phosphorus only, and 2.06% and 3.00% for simultaneous determinations of phosphorus and arsenic, respectively. The possible ranges of determination by the method were 0.01 to 0.1% phosphorus and 0.02 to 0.2% arsenic in molybdenum.
社団法人日本分析化学会の論文
1976-10-10

試料中のモリブデンを利用したモリブデン中のリンとヒ素の吸光光度定量

スポンサーリンク

概要

著者

関連論文

スポンサーリンク