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一种新型便携式高精度数字比色仪
引用本文:秦鲲,曾国强,徐进勇,葛良全,倪师军.一种新型便携式高精度数字比色仪[J].自动化与仪表,2012,27(4):14-17.
作者姓名:秦鲲  曾国强  徐进勇  葛良全  倪师军
作者单位:1. 成都理工大学核技术与自动化工程学院,成都,610059
2. 四川省地学核技术重点实验室,成都,610059
摘    要:该文设计了高稳定度恒流源用以驱动多只不同发光波长的发光二极管作为比色分析的光源,采用TSL2561高精度数字式集成光电传感器件作为光强度检测元件,可自动在镍氢电池和市电之间切换并为仪器供电。同时还设计了镍氢电池自动充放电电路,满足了便携式仪器的电源管理要求。通过邻二氮菲显色测铁的经典比色实验测试,结果表明:线形范围为:0~4μg/mL Fe2+,且相关系数(R):0.998554;相对标准偏差(RSD;n=10):<1%;性能可与实验室经典的可见光分光度仪媲美。

关 键 词:恒流源  数字比色仪  光照度传感器

A New Kind of Portable High Accuracy Digital Colorimetric Instrument
QIN Kun , ZENG Guo-qiang , XU Jin-yong , GE Liang-quan , NI Shi-jun.A New Kind of Portable High Accuracy Digital Colorimetric Instrument[J].Automation and Instrumentation,2012,27(4):14-17.
Authors:QIN Kun  ZENG Guo-qiang  XU Jin-yong  GE Liang-quan  NI Shi-jun
Affiliation:1(1.College of Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu 610059,China;2.Sichuan Geological Nuclear Technology Key Laboratory,Chengdu 610059,China)
Abstract:Design the high constancy current source to drive several light-emitting diodes that have different light wave-Lengths,and use these LEDs as light source in colorimetric analysis.High accuracy digital integrated photoelectric detecting sensor was used to detect the different absorbance of blank and sample,and compute the density of sample.This instrument could be supplied by NI-MH battery and AC power.With the automatic charging and discharging circuit for NI-MH battery,it can meet the demand of portable instruments.Compared with the classic color matching examination used 10-Phenanthroline as indicator,the result shows as follow:linearity area:0-4μg/ml Fe2+;correlation coefficient(R):0.998554;relative standard deviation(RSD;n=10):1<1%;The property of this equipment is equal to classic visible spectro-photometric equipment used in Laborary.
Keywords:constant current source  digital colorimetric instrument  illumination sensor
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