›› 2017, Vol. 29 ›› Issue (8): 1347-1352.DOI: 10.3969/j.issn.1004-1524.2017.08.16

• Environmental Science • Previous Articles     Next Articles

Study on determination of exchangeable aluminum by inductively coupled plasma atomic emission spectrometry

JI Tianwei, SHEN Yue, CHEN Sili, FU Encheng   

  1. Agricultural Technology Extension Center of Zhejiang Province, Hangzhou 310020, China
  • Received:2017-02-27 Online:2017-08-20 Published:2017-09-06

Abstract: To analyze the soil exchangeable aluminum contents of soil samples, the inductively coupled plasma atomic emission spectrometry (ICP-AES) method was applied and compared with the neutralization titration method. Variance analysis showed that the measured value between the two methods was not statistically significant (P>0.05). The soil exchangeable aluminum was extracted using the soil-water ratios of 1∶50 and 1∶25, respectively, and then determined by both ICP-AES and neutralization titration method. Variance analysis showed that the aluminum content under 1∶50 extraction ratio was significantly (P<0.01) lower than that under 1∶50 extraction ratio. Two kinds of sample weight (5 g and 2 g) were also compared. It was shown that the soil sample weight could be cut down to 2 g. The optimum wavelength of analytical spectral line was 396.1 nm for soil exchangeable aluminum determination by ICP-AES, and the aluminum concentration for the standard curve was suggested as 0-50 mg·L-1. The detection limit, limited quantity and recovery rate of aluminum were 0.050 mg·L-1, 0.168 mg·L-1 and 98%, respectively.

Key words: exchangeable aluminum, inductively coupled plasma, determination method

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