Niu Erchao1,Hong lingcheng1,2,Li Wen1
(1. Institute of Environmental Science and Engineering, Hohai University, Nanjing 210098, Jiangsu, China; 2. Delin Environmental Instrument Co. Ltd., Nanjing 210001, Jiangsu, China)
Abstract: A new method for the determination of total iron in water with 1,10-Phenanthroline as the chromogenic agent was developed using the quantitative-tube sequential injection spectrometry coupled with a completely set of PLCprogramsystem. Under optimized conditions,the detection range is 0~10mg/L,the linear regression equation is A = 0.0995 c + 0.0421(c: mg/L, n = 8) with correlation coefficient of 0.9996. The detection limit was 0.02 mg/L,and the recoveries of environmental samples were between 97.1%~102.0% with the relative standard deviation less than 2.3%.
Key words: total iron;quantitative-tube sequential injection;1,10-Phenanthroline;on-line determination;water quality
E-mail: rmman11@126.com
Analysis and Testing Technology and Instruments, Vol. 17, No. 3, 2011,164-168
