基于Labview的分光光度法在线测定磷、氮、硫仪器的研制

Development of an Instrument for on-line Determination of Phosphorus, Nitrogen and Sulfur by Spectrophotometry Based on Labview

本文以分光光度法建立了一套水体中多价态含磷、氮、硫污染物的在线检测体系,配合基于labview开发的测试软件,实现了对水质情况的实时检测。系统涉及取样、前处理、多价态检测、数据采集和传输等多个方面,对水体中多种污染物进行定量分析。各标准曲线的线性度均在0.99左右,检测限可达10-2μg/mL。适用于含磷、氮、硫的液体样品快速、准确的在线连续测试。

This article establishes a set of on-line detection system for multi-valent phosphorus,nitrogen and sulfur pollutants in water by spectrophotometry.With the test software developed based on labview,real-time detection of water quality is realized.The system involves sampling,pretreatment,multivalent detection,data acquisition and transmission,etc.It can quantitatively analyze various pollutants in water.The linearity of each standard curve is about 0.99,and the detection limit can reach 10-2μg/mL.It is suitable for rapid and accurate online continuous testing of liquid samples containing phosphorus,nitrogen and sulfur.