高感度ニッケル試験紙を用いるニッケルめっき付着量の迅速定量 : 簡易分析法の研究(第1報)

概要

論文の詳細を見る
A rapid routine analytical method for the determination of the amount of nickel on nickel plating specimen has been required for the control of the process of nickel plating plant. Therefore, the authors devised a simple method which treated the sample in a special dissolution vessel with mixed acid and the amount of nickel was determined by using high sensitive nickel test paper. In order to improve the accuracy of determination, the standard color scale of various gradation in the range of about 5 to 500ppm was prepared at an interval of 5 to 20ppm according as nickel content. The procedure is as follow: Prepared sample is fixed in a special vessel for dissolution and the nickel plating sheet is treated with 5ml of mixed acid. The solution is transfered into a 100ml measuring cylinder. The solution obtained contains nickel and ferric ion. In order to mask ferric ion and to control pH, potassium fluoride crystal is added until a white precipitate appears. The solution is diluted to 50ml with water and then nickel test paper is dipped into the solution. The resulting color of the test paper is compared with the standard. color scale and nickel content is determined. Analytical results of this method agreeded with those of EDTA method. The time required for the analysis was about 3 minutes for one sample.
社団法人日本分析化学会の論文