DETERMINATION OF EXCHANGEABLE BASES IN SOILS OF DIFFERENT pH VALUES BY ICP-AES

AN Shuai; CHEN Jian-hui; WANG Wei-dan; MA Jian-sheng; ZHAO En-hao; ZHOU Xiao-fan

doi:10.13686/j.cnki.dzyzy.2024.05.013

2024 Vol. 33, No. 5

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AN Shuai, CHEN Jian-hui, WANG Wei-dan, MA Jian-sheng, ZHAO En-hao, ZHOU Xiao-fan. DETERMINATION OF EXCHANGEABLE BASES IN SOILS OF DIFFERENT pH VALUES BY ICP-AES[J]. Geology and Resources, 2024, 33(5): 725-732. doi: 10.13686/j.cnki.dzyzy.2024.05.013

Citation:

AN Shuai, CHEN Jian-hui, WANG Wei-dan, MA Jian-sheng, ZHAO En-hao, ZHOU Xiao-fan. DETERMINATION OF EXCHANGEABLE BASES IN SOILS OF DIFFERENT pH VALUES BY ICP-AES[J]. Geology and Resources, 2024, 33(5): 725-732. doi: 10.13686/j.cnki.dzyzy.2024.05.013

DETERMINATION OF EXCHANGEABLE BASES IN SOILS OF DIFFERENT pH VALUES BY ICP-AES

1.
Shenyang Center of China Geological Survey, Shenyang 110034, China
2.
Key Laboratory of Black Land Evolution and Ecological Effects, MNR, Shenyang 110034, China
3.
Liaoning Nonferrous Geological Exploration Institute Co., Ltd., Shenyang 110121, China
4.
Service Center, Departmant of Nature Rosources of Liaoning Province, Shenyang 110033, China

More Information

Corresponding author: MA Jian-sheng, mjs1015@163.com

Received Date: 19 May 2023

Revised Date: 14 July 2023

Publish Date: 25 October 2024

Abstract

Abstract

Exchangeable base is an important index to evaluate soil fertilizer supply, fertilizer conservation and soil buffering ability. There are some problems such as large matrix interference, cumbersome analysis steps and poor reproducibility by traditional measurement method, which uses direct determination after ammonium acetate/ammonium chloride-ethanol extraction. To improve the test precision and efficiency, the extraction solutions of soil with different pH values are optimized, through desalting and redissolving at a high temperature after being dried in a water bath, no ammonium acetate/ammonium chloride matrix matching required for standard curve. The contents of exchangeable K, Na, Mg and Ca are determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) using the same standard curve. The method is used to analyze 4 standard substances for available nutrients of soil, including ASA-11, ASA-14, ASA-16 and ASA-20. The measurement results are all within the range of uncertainty, with the relative error between the measured value and standard value of the 4 elements from -1.32% to +7.27%, the relative standard deviation less than 3.50%, and the maximum relative difference of 9.92%(< 10%), which meets the requirements of analytical test. The method has good reproducibility for soil samples with different pH values, overcoming the shortcomings of being too simple or cumbersome in the traditional analysis process with poor reproducibility, completing the on-line detection of K, Na, Mg and Ca simultaneously, shortening the analysis steps, and improving the analysis efficiency and saving costs.
- soil /
- exchangeable base /
- high temperature resolution /
- inductively coupled plasma atomic emission spectrometry(ICP-AES)

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References

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