发明名称 |
ANALYSIS OF TIN, LEAD OR TIN-LEAD ALLOY PLATING SOLUTION |
摘要 |
In electroless or electric tin, lead or tin-lead alloy plating solution which may contain copper, the concentration of a metal ion component selected from divalent tin ion, lead ion, and copper ion is quantitatively determined by taking a sample from the solution, adding a chemical agent to the sample, thereby causing the selected metal ion to develop its color, measuring the absorbance of the sample due to the metal ion by colorimetry, and determining the concentration from the absorbance. A choice of chemical agent depends on a particular metal ion on analysis. When the solution contains more than one metal ion, correction is made by repeating the process using another chemical agent. |
申请公布号 |
EP0501480(A3) |
申请公布日期 |
1993.03.03 |
申请号 |
EP19920103372 |
申请日期 |
1992.02.27 |
申请人 |
C. UYEMURA & CO, LTD |
发明人 |
UCHIDA, HIROKI;KUBO, MOTONOBU;KISO, MASAYUKI;HOTTA, TERUYUKI;KAMITAMARI, TOHRU |
分类号 |
C23C18/31;C23C18/48;C23C18/52;G01N21/78;G01N25/00;G01N31/00;G01N31/22;G01N33/20 |
主分类号 |
C23C18/31 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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