基于FCS的海水痕量元素的通用测定平台

Design of a Common Platform for Determination of Trace Element in Seawater Based on FCS

摘要:

为了对海水痕量营养盐与重金属进行测定,基于FCS的设计思想,采用流动注射分光光度法研制了具有自适应外界设备、快速组建多种仪器及全数字化通信等特点的软硬件一体化的通用测定平台;平台以ARM(S3C2416)处理器为核心,Linux为操作系统,LCD作为人机交互显示,触摸屏或者USB鼠标完成输入控制,构成完整的嵌入式工控机系统；采用CAN总线并制定CAN应用层协议管理设备,提高了系统的可靠性及抗干扰能力;实际测试和应用证明,该平台自动化程度高,通用性、重用性及可扩展性均较强,可组建成亚硝氮、硝氮、氨氮、活性磷、铁等多种痕量元素的实验室、船载和原位分析系统,检测限为nmol/L级别;平台对样品的测试准确度与商品专用仪器无显著性差异。

Abstract:

Flow injection analysis was adopted for the determination of trace element in seawater samples, and the relative instrument was developed. Based on the FCS design ideas, a software-hardware integration measurement platform with automated adaptive external devices, rapid formation of a variety of instruments and all-digital communications had been established. The platform was embedded with ARM (S3C2416) processor and Linux operating system, which had a human-computer interaction by LCD and an input-controller by touch screen or USB mouse. It used a CAN bus and developed a CAN Application Layer (CAL) protocol for device management. It showed characteristics of automation, versatility, reusability and scalability to achieve analysis of trace nitrite, nitrate, ammonia, phosphorus, iron and other elements in seawater, in laboratory, shipboard and in-situ applications. In the practical test, the measurement results of the platform had no significant differences with that of a commercial special spectrophotometer.