Abstract：Determination of arsenic in pure aluminum by inductively coupled plasma atomic emission spectrometry was interfered by aluminum matrix. The experiment showed that when the mass concentration of Al was greater than or equal to 5 000 times the As in the test solution, the measurement error was greater than 5%. In order to eliminate the interference, strong acid cation exchange fiber (SACEF) was used as solid phase extraction agent to adsorb Al3+. The extraction conditions included amount of SACEF, extraction time, temperature and pH were investigated. The optimal extraction conditions were that 0.900 0 g SACEF was used to extract the aluminum from the sample solution of pH 2.0 at 55 ℃ for 5 min with the ultrasonic assist, and in this case, the arsenic in the form of arsenic acid was not extracted and left in the solution for the determination. The results showed that after treating 10.00 mL test solution containing 1.00 μg arsenic and 20.0 mg aluminum, arsenic did not lose. The mass concentration of residual aluminum in the raffinate was about 2 000 times the As, which had not interfered the determination of arsenic. The detection limit (3 s) was 0.027 μg·mL-1 and quantification limit (10 s) was 0.091 μg·mL-1. The proposed method was successfully applied to the separation and determination of arsenic in the synthetic samples, the aluminum cans and the barbecue aluminum foil. Recovery was in the range of 98.3%~105% and RSD (n=3) was in the range of 0.1%~4.3%. The results showed that the content of arsenic in the aluminum cans and the aluminum barbecue foil was below the limited value of national standard (GB/T 3190—2008).
覃文霞，龚 琦*，李 敏，邓立新，莫利书，李艳琳 . 超声辅助固相萃取分离/ICP-AES测定食品包装铝材中砷的研究 [J]. 光谱学与光谱分析, 2015, 35(04): 1043-1047.
QIN Wen-xia, GONG Qi*, LI Min, DENG Li-xin, MO Li-shu, LI Yan-lin . Determination of Arsenic in Food Package Aluminum by Ultrasound Assisted Solid Phase Extraction/ICP-AES. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(04): 1043-1047.
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