Application of Uniform Design in Optimizing the Condition of Arsenic Determination by Atomic Fluorescence Spectrometry
YANG Qi-xia1,HAN Ji-qu2*,CHANG Xian-bo1,DU Xu-chang3
1. College of Environmental & Material Engineering, Yantai University, Yantai 264005, China 2. Institute of Optoelectronic Technology，Yantai University, Yantai 264005, China 3. Laizhou Boiler Inspection Bureau, Laizhou 261400, China
Abstract：In the present paper, uniform design U*10(108) was used to optimize the condition of arsenic determination in vegetable samples by hydride generation-atomic fluorescence spectrometry. Mathematical model was established and regression analysis was done, and the optimized solutions to those equations were obtained by making use of the UD3.0 software. Combining the life-span of hollow cathode filament, noise of negative voltage and other factors, the optimal condition was obtained as follows: negative voltage was 280-360 V;lamp current was 50-70 mA;carrier gas flow rate was 500-700 mL·min-1;KBH4 concentration was 15.0-20.0 g·L-1;HCL concentration was 0.6-1.2 mol·L-1;sample size was 0.5-1.0 mL. Two samples of vegetable were analyzed under the optimized condition. The results showed that the relative standard deviation was less than 3.6%, and the recovery was within 94.1%-101.3%，with their detection limits of 0.42 μg·L-1. In this paper, as an effective method of experiment design, uniform design was introduced to hydride generation-atomic fluorescence spectrometry analysis with multi-factors, which offered a good idea for the optimization of experiment conditions.
Key words：Uniform design;Hydride generation-atomic fluorescence spectrometry;Arsenic;Optimization of experiment conditions
杨启霞1,韩吉衢2*,常显波1,杜旭昌3 . 均匀设计在优化原子荧光法测砷条件中的应用[J]. 光谱学与光谱分析, 2009, 29(02): 526-529.
YANG Qi-xia1,HAN Ji-qu2*,CHANG Xian-bo1,DU Xu-chang3. Application of Uniform Design in Optimizing the Condition of Arsenic Determination by Atomic Fluorescence Spectrometry. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(02): 526-529.
