摘要
研究了新试剂－Ｎ间甲苯基－Ｎ’－（氨基对苯磺酸钠）硫脲（ＭＭＰＴ）与铂（Ⅳ）的显色反应，结果表明，在 ｐＨ ３．７～４．４的 ＨＡｃ－ＮａＡｃ缓冲体系中，Ｐｔ（Ⅳ）与 ＭＭＰＴ形成 １：３的绿色水溶性络合物，最大吸收波长位于 ７５４．４ ｎｍ，表观摩尔吸光系数ε７５４．４＝８．５８ × １０４·ｍｏｌ－１·ｃｍ－１，铂含量在０～１．２８ ｍｇ／Ｌ的范围内服从比尔定律。本法灵敏度高、选择性好、操作简便、测定结果准确可靠。将其用于矿石和催化剂中铂的测定，结果令人满意。
The color reaction of new water soluble color reagent N-m-methylphenyl-N' - (Sodium-p-aminobenzene sulfonate) thiourea (MMPT) with Pt(N ) was studied. The result indicates that in the HAc-NaAc butter solution with pH 3. 7～4. 4, a stable 1: 3 green com- plex of Pt(Ⅳ) with reagent is formed. The apparent molar absorptivity is 8. 58 ×104L. mol1. cm1 at the maximum absorption wavelength 754. 4 nm and Beer's law is obeyed in the range of 0～1. 28 mg/L. The method has high sensitivity and selectivity. Its operation is simple. Also it can be successfully used for the determination of Pt (Ⅳ) in minera1 and catalysts.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1997年第8期902-905,共4页
Chinese Journal of Analytical Chemistry
基金
河南省自然科学基金
关键词
光度法
显色剂
MMPT
硫脲
铂
催化剂
N-m-methylphenyl-N'-(Sodium-p-aminobenzene sulfonate) thiourea, platinum, catalyst
