化学镀镍液中次磷酸钠在线自动测试的研究

Study on Automic Analysis on Production Line of Sodium Hypophosphite During Plating Baths of Electroless Nickel Plating Process

研究了化学镀镍工艺过程镀液中次磷酸钠浓度的在线自动测试，采用连续流动分光光度的原理研制成功了在线自动测试仪，通过对标准次磷酸钠溶液的测试得出了次磷酸钠浓度与入射光透过率对数关系的回归方程。通过对不同镀液的测试，该测试仪测试的标准偏差小于２％，与化学分析方法相比的误差小于４％，并可将测试时间缩短至６ｍｉｎ。

This paper studies the automic analysis on the production line of sodium hypophosphite during plating baths of electroless nickel plating process.Using the principle of continuous flow spectrophotometry,the instrument of automic analysis on production line is developed.The regression equation between the sodium hypophosphite concentration and the logarithm of incident lights transmitivity is abtained through the standard concentration of sodium hypophosphite being determined.The standard deviaTPPtion of the instrument is less than 2% and the error comparing to the chemistic analytic method is less than 4%.The analytic time only takes 6 minutes.The instrument is suitble for the automic analysis of sodium hypophosphite on electroless nickel plating production line.