摘要
在 p H4.74的 HAc- Na Ac缓冲溶液中 ,以氨三乙酸为活化剂 ,KIO4 氧化锌试剂的反应受 Mn( )的催化加速 ,从而建立了测定超痕量锰的新方法。研究了影响反应速率的条件 ,测定了反应的表观活化能及表观速率常数。该法的检出限为 2 .4× 1 0 -11g/m L,测定范围是 0 .0～ 2 0 ng/1 0 m L。可用于蒸馏水中超痕量锰及大豆。
Using nitrolotriacetic acid as an activating agent,Mn(Ⅱ) can catalyze reaction of zincon with potassium periodate in HAc～NaAc(pH=4.74) buffers. The optimum conditions for the rate of the reaction were found, and some kinetic parameters were estimated. The detection limit is 2.4×10 -11 g/mL and the linear range for determination of manganese is 0～20 ng/10mL. The method was used for determination of trace manganese in distilled water,soybean and flour samples with satisfactory results.
出处
《分析试验室》
CAS
CSCD
2000年第5期48-49,共2页
Chinese Journal of Analysis Laboratory
关键词
动力学光度法
锰
蒸馏水
大豆
面粉
痕量分析
Kinetic spectrohotometry
Zincon
Manganese
Distilled water
Soybean
Flour
