«Previous Article|Table of Contents|Next Article»

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:

2003年02期

Page:

8-11

Research Field:

Publishing date:

Info

Title:

Spectrophotometric Catalytic Determination of Micro-amount Chromium in Steel Based on Oxidation of Bromopyrogallol Red by Hydrogen Peroxide

Author(s):

Shu Heqing; Chen Shuhua

College of Chemistry and Chemical Engineering, Jiangsu University, 212003, Zhenjiang, PRC

Keywords:

Trace analysis;  Spectrophoto metric catalytic determination;  Chromium;  steel

PACS:

O657.3

DOI:

-

Abstract:

Chromium ( VI) was determined based on its catalytic effect on the decolorization reaction of Bromo- Pyrogallol Red with hydrogen peroxide in weakly acidic solutions. The optimum condition for indicator reaction and interference effect of various ions have also been studied. The apparent activation energy of catalytic and non- catalytic reactions were calculated by Arrhenius equation. The calibration curve is linear in the range of 0.1 to 0.6 μg Cr ( VI) / 25 mL. The detection limit reached down to 9.1× 10 ^{- 10} g / mL. The method was successfully applied to the determination of micro amount Chromium in the steel.

References:

[ 1] Yatsknirakil K B. Kinetic Methods of Analysis[M] . Oxford: Pergamon, 1968.
[ 2] 冯素玲, 王瑞勇, 樊静. 催化荧光法测定痕量铬( VI) [ J] . 分析化学, 2000, ( 1) : 61~ 63.
[ 3] 吴和舟, 邱才英, 郑肇生. 以十六烷基三甲基溴化铵为增敏剂催化光度法测定痕量铬( VI) [ J] . 分析化学, 1999, ( 6) :668~ 671.
[ 4] 庄楚强, 吴亚森. 应用数理统计基础[M] . 广州: 华南理工大学出版社, 1992.

Memo

Memo:

-

Common functions

Last Update: 2013-04-29