試料迅速電解ガス導入 : 誘導結合プラズマ発光分光分析法による鉄鋼中リンの定量(<特集>分析技術と方法論の最近の進歩)

概要

論文の詳細を見る
Solid steel sample dissolution with electrolysis-inductively coupled plasma atomic emission spectrometry (ICP-AES) is applicable to multielemental analysis of steel by analyzing the elements in the electrolyte. The disk-shaped steel sample is electrolyzed through an electrolysis cell and the electrolyte is introduced into the ICP continuously. However, the sensitivity of phosphorous was not enough practically. We examined to improve the sensitivity with sample heating and electrolytic gas introduction system. At room temperature, phosphorus exists as PO^<3->_4 ion in the electrolyte, and sensitivity was not enough due to the low efficiency in sample introduction efficiency to the plasma via nebulizer. However when the sample was heated, gaseous PH_3 improved introduction efficiency therefore sensitivity was improved remarkably. When the steel samples taken from steel making process, heated at 80℃, were analyzed with the technique in which generated gas in the electrolysis was introduced to the plasma, the analytical results were in a good agreement with these of the result of the phosphovanadomolybdate spectrophotometric method.
社団法人日本鉄鋼協会の論文
2007-02-01