作　　者： ;

机构地区： 宁波大学材料科学与化学工程学院

出　　处： 《冶金分析》 2006年第2期5-8,共4页

摘　　要： 采用4-羟基-3-（2-羟基萘偶氮）苯磺酸钠（酸性媒蓝紫，缩写为SVRS）-微分吸附计时电位法（DACOP）测定合金钢中微量钙。在0．2mol／LNH4Cl-NH3·H2O-8×10^-4mol／LSVRS（pH8．0）底液中，Ca—SVRS络合物在-0．9V电位处产生灵敏还原峰，峰高的增量与钙浓度成正比。用于钙的定量分析，线性范围为1×10^-7～1．5×10^-5mol／L，相对标准偏差为1．9％（n=10），检出限为5．0×10^-8mol/L。对实际舍金钢样品中钙进行分析，并与ICP—AES法进行比较，结果吻合。 A simple and reliable electroanalytical method for the fast determination of calcium in alloy steel by derivative adsorption chronopotentiometry （DACOP） with solochrome violet RS （SVRS）was described. In the medium of 0.2 mol/L NH4Cl - NH3· H2O （pH 8.0） and 8 × 10 ^- 4 mol/L SVRS, a sensitive reduction peak of Ca-SVRS complex was observed at - 0.9 V. The increment of peak height was proportional to the concentration of calcium in the range of 1 × 10^-7 - 1.5 × 10^-5mol/L. No serious interference was found.The detection limit of this method was 5 ×10^-8mol/L, and the relative standard deviation was 1.9% for 5 × 10^-7mol/L Ca（ n = 10）.This method was successfully applied to the analysis of Ca in alloy steel samples.The results were in good agreement with those obtained by ICP-AES.

关 键 词： 酸性媒蓝紫 钙 合金钢 微分吸附计时电位法

领　　域： [理学] [理学]