4-(8-羟基-3,6-萘二磺酸-1-偶氮)-1-苯基-3-甲基吡唑啉酮光度法测定钢铁中镁  

Spectrophotometric determination of magnesium in steel with 4-(8-hyd roxy-3,6-naphthalene disulfonic acid-1-azo)-1-phenyl-3-methylpyrazolone

作　　者：胡秋芬[1] 马莎[1] 汤丹瑜[1] 尹家元[1] 

机构地区：[1]云南大学化学系,云南昆明650091

出　　处：《冶金分析》2001年第4期18-19,11,共3页Metallurgical Analysis

摘　　要：研究了 4 ( 8 羟基 3 ,6 萘二磺酸 1 偶氮 ) 1 苯基 3 甲基吡唑啉酮 (HAPMP)与镁的显色反应 ,在 pH1 0硼砂 氢氧化钠缓冲介质中 ,溴化十六烷基三甲基铵 (CTMAB)存在下 ,镁与HAPMP生成 2∶1络合物 ,λmax=560nm ,ε=3 57× 1 0 4。镁含量在 0~ 1 0 μg/2 5mL内符合比尔定律 ,方法用于钢铁样品中镁的测定 ,结果令人满意。The color reaction of magnesi um*' with 4-(8-hydroxy-3,6-naphtale ne disulfonic acid-1-azo)-1-phenyl-3-methylpyraz olone (HAPMP) was studied.In the presence of CTMAB (p H10) and in the medium of bor ax-sodium hydroxide buffer solutio n, HAPMP can react with magnesium*' to form a stable 2∶1 complex.The apparent mola r absorptivity is 3.57×10 4L·mol -1 · cm -1 at 560nm.Beer's law is obeyed in the range of 0~10μg/25mL.This m ethod can be applied to determine magnesium in steel and ore with sa tisfactory results.

关 键 词：苯基 甲基吡唑啉酮 镁 光度法 钢铁样品 显色反应 HAPAM 

分 类 号：O657.3[理学—分析化学] TG115.33[理学—化学]