为满足医药类生产企业中水质监测所使用的在线TOC分析仪在500μg/L浓度以下的原位校准需求,建立了一套由高精度微量陶瓷注射泵、磁力搅拌混匀单元和步进电机控制恒流注射器组成的在线水质TOC监测仪自动校准装置。通过PLC控制高精度微量陶瓷注射泵和大容量注射泵分别将高浓度TOC标准原液和纯水进行比例混匀,实现了对在线水质TOC监测仪500μg/L以下量程的自动校准,线性相关性0.9924。
Abstract
In order to meet the needs of in-situ calibration of online TOC analyzer used in water quality monitoring in pharmaceutical enterprises under 500μg/L concentration, a set of on-line total organic carbon (TOC) monitor in-situ calibration device is established, which is composed of high-precision micro ceramic injection pump, magnetic mixing unit and constant current syringe controlled by step motor. The high concentration TOC standard stock solution and pure water are proportioned by high precision micro ceramic injection pump and large capacity injection pump controlled by PLC. The automatic calibration of the measuring range below 500μg/L of the on-line total organic carbon (TOC) monitor is realized, with a linear correlation of 0.9924.
关键词
计量学 /
总有机碳 /
在线水质监测 /
原位校准
Key words
metrology /
total organic carbon /
on-line water quality monitoring;in-situ calibration
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基金
江苏省市场监督管理局科研项目(KJ175920)
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