CAJ | 학술논문

建立高氯酸氧化-硫酸亚铁铵滴定测定不锈钢中铬元素含量的分析方法.以王水溶解试样,加高氯酸,加热发烟使三价铬被氧化为六价铬,在一定的酸性条件下,以N-苯基邻氨基苯甲酸作指示剂,硫酸亚铁铵标准溶液作滴定液,将六价铬还原为三价铬,根据消耗滴定液的体积计算试样中铬的含量.通过分析试样溶解的热源温度、高氯酸发烟的温度和时间等操作条件,探讨了高氯酸氧化-硫酸亚铁铵滴定法测定不锈钢中铬元素含量的最佳操作条件.在该条件下,选定6个标准钢样进行铬含量测定,测得铬含量与标准值基本一致,测定结果的相对标准偏差在0.13%~0.28%之间.该方法操作简便、快速,准确度较高,适用于不锈钢中铬含量的测定.
건립고록산양화-류산아철안적정측정불수강중락원소함량적분석방법.이왕수용해시양,가고록산,가열발연사삼개락피양화위륙개락,재일정적산성조건하,이N-분기린안기분갑산작지시제,류산아철안표준용액작적정액,장륙개락환원위삼개락,근거소모적정액적체적계산시양중락적함량.통과분석시양용해적열원온도、고록산발연적온도화시간등조작조건,탐토료고록산양화-류산아철안적정법측정불수강중락원소함량적최가조작조건.재해조건하,선정6개표준강양진행락함량측정,측득락함량여표준치기본일치,측정결과적상대표준편차재0.13%~0.28%지간.해방법조작간편、쾌속,준학도교고,괄용우불수강중락함량적측정.
Method of perchloric acid oxidation - ammonium ferrous sulfate titrimetric determination of chromium content in stainless steel. Sample is dissolved in aqua regia, heightening the heating smoke chlorate, trivalent chromium is oxidized to chromium six, in acidic conditions, N- phenyl anthranilic acid as indicator, ammonium ferrous sulfate standard solution as titrant, six hexavalent chromium reduction to trivalent chromium, chromium content in the sample is calculated according to the titration the volume of liquid. The operating conditions of smoke through the heat source temperature, analysis the sample dissolved perchloric acid temperature and time, discusses the perchloric acid oxidation - ammonium ferrous sulfate titrimetric method for the determination of chromium content of stainless steel in the best operating conditions. In this condition, a selection of 6 standard steel samples for the determination of chromium content, measured chromium content is basically consistent with the standard value, the relative standard deviations were between 0.13%-0.28%. The method is simple, rapid, accurate, suitable for determination of chromium content in stainless steel.