FLOW-INJECTION DETERMINATION OF CHROMIUM(VI) IN A CHROME-PLATING ELECTROLYTE

被引：0
|
作者：
GUREV, IA [1 ]
KALUGIN, AA [1 ]
ZYUZINA, LF [1 ]
LAZAREVA, OP [1 ]
机构：
[1] MORDVINIAN STATE UNIV,SARANSK,RUSSIA
来源：
INDUSTRIAL LABORATORY | 1994年 / 60卷 / 08期
关键词：
D O I：
暂无
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A flow-injection redox-potentiometric method for Cr6+ analysis in a chrome-plating electrolyte has been proposed. Optimum operating conditions were: sample volume, 135 mu l; flow rate, 0.8 ml/min; reaction helix length, 330 mm. A 0.1-N Mohr's salt solution, titrated with 0.1-N solution of K2Cr2O7 to 97%, was used as a flow. Cr3+, CU2+, Mn2+ ions taken in a 100-fold excess did not interfere with the analysis. The Fe3+ interferent was removed by adding H3PO4 (85%) to the flow solution in a 3:1 proportion. The Cr6+ concentration could be analyzed within a 10(-4) -10(-1) mole/liter range, with the relative standard deviation not exceeding 0.07.
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页码：454 / 455
页数：2
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