关于连续流动分析法与流动注射分析法测定水中硫化物的验证与对比

打开文本图片集

Validation and Comparative Exploration of Continuous Flow Analysis and Flow Injection Analysis for the Determination of SulfidesinWater

YUAN Bo HE Yang CUI Chen （Henan Hydrological and Water Resources Monitoring and Reporting Center，Zhengzhou 450ooo，China）

Abstract： [Purposes] This study systematicaly validated the key analytical performance differences betweenContinuous Flow Analysis （CFA）and Flow Injection Analysis （FIA）for thedetection of sulfides in surface water，with parameters such as sensitivity，accuracy，andanti-interference capabilityquantified， so as to provide an empirical basis for water quality laboratories to select appropriate methods according to practical needs.[Methods] Experiments were conducted in accordance with standard methods SL/T 788.3-2019 and HJ 824-2017， using a CFA system （SKALAR SAN++5000） and an FIA system （Baode BDFIA-86OO）. Method validation and real water sample testing were carried out based on parameters including linear range，detection limit，precision，and spike recovery.[Findings] The results showed that both methods demonstrated excellent linearity （ R2⩾0.999 ） within the range of O～2.0 mg/L. The detection limit of CFA was 0.016mg/L ，while thatofFIA reached 0.000 6mg/L . The spike recovery of CFA was 90%～ 111% ， and that of FIA was 95%～103% . The analysis eficiency of CFA was 6O samples/h，and that of FIA was 45 samples/h.[Conclusions] Both methods are suitable for surface water monitoring.Among them，FIA is more applicable for trace-level sulfide detection，while CFA shows greater advantages in high-throughput routine monitoring.

Keywords： sulfides;continuous flow analysis; flow injection analysis; methodological validation and comparison; water quality monitoring

0 引言

硫化物（以二价硫离子计）是水质监测的关键毒理指标之一，其监测对环境保护和公共健康至关重要。（剩余4141字）