Open AccessApplication of total phosphorus sequential injection system in Qingdao coastal area
Author(s) -
Qian Shi,
Yanmin Zhang,
Zejun Sun,
Wang Yang
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/446/3/032112
Subject(s) - phosphorus , univariate , detection limit , seawater , environmental science , range (aeronautics) , linear range , relative standard deviation , spectrum analyzer , limit (mathematics) , multivariate statistics , chemistry , chromatography , mathematics , geology , oceanography , computer science , statistics , materials science , telecommunications , organic chemistry , composite material , mathematical analysis
An integrated system was developed for automatic determination of total phosphorus in seawater based on sequential injection analysis combined with spectrophotometric detection. The experimental parameters of digestion were optimized based on a univariate experimental design. The upper limit of the linear range of the proposed method was 1000 μg/L. The relative standard deviations (RSDs) of accuray were below ±2% (n=3) and the RSD of presicion was 2.18% (n=6). This system has been successfully applied to determine total phosphorus in Qingdao Coastal area. The F test and t test implied the results of the system had no evident difference with those detected by nutrient flow analyzer in the laboratory.