Determination of Available Boron in Soil by ICP-OES with Hot Water Bath Extraction

GUO Jiaze; YAO Rui; CHENG Jiang; YANG Guojun; LI Fei; ZHOU Wenxuan

doi:10.15898/j.cnki.11-2131/td.202108200103

2022 Vol. 41, No. 4

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Article navigation > Rock and Mineral Analysis > 2022 > 41(4): 614-620

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GUO Jiaze, YAO Rui, CHENG Jiang, YANG Guojun, LI Fei, ZHOU Wenxuan. Determination of Available Boron in Soil by ICP-OES with Hot Water Bath Extraction[J]. Rock and Mineral Analysis, 2022, 41(4): 614-620. doi: 10.15898/j.cnki.11-2131/td.202108200103

Citation:

GUO Jiaze, YAO Rui, CHENG Jiang, YANG Guojun, LI Fei, ZHOU Wenxuan. Determination of Available Boron in Soil by ICP-OES with Hot Water Bath Extraction[J]. Rock and Mineral Analysis, 2022, 41(4): 614-620. doi: 10.15898/j.cnki.11-2131/td.202108200103

Determination of Available Boron in Soil by ICP-OES with Hot Water Bath Extraction

1.
Kunming Center of Natural Resources Comprehensive Survey, China Geological Survey, Kunming 650100, China
2.
Chengdu Center, China Geological Survey, Chengdu 610081, China

More Information

Corresponding author: CHENG Jiang, cjiangcgs@163.com

Received Date: 20 August 2021

Revised Date: 29 September 2021

Accepted Date: 05 November 2021

Publish Date: 28 July 2022

Abstract

Abstract

BACKGROUND
At present, the main methods of soil available boron analysis are spectrophotometry and inductively coupled plasma-optical emission spectrometry (ICP-OES). The spectrophotometric method has a long process, cumbersome operation, low analysis efficiency and easy environmental pollution, high requirements on the experience of the analyst, and unstable measurement results. The existing ICP-OES method has shortcomings such as long extraction time and high extraction temperature. It has low efficiency in analyzing large quantities of samples, wastes electrical energy and has the risk of scalding during operation.
OBJECTIVES
In order to improve the ICP-OES method with water bath extraction for determination of available boron in soil.
METHODS
The polyethylene stoppered plastic bottle was used instead of a quartz conical flask and a reflux device. Ultrapure hot water was added as the extractant. After leaching in a hot water bath, the ICP-OES method was used to determine the available boron content.
RESULTS
The optimal extraction conditions were determined through experiments: using 85℃ ultrapure hot water as the extractant, soil-liquid ratio of 1∶2, water bath extraction temperature of 85℃, extraction time of 6min, using ICP-OES method after hot centrifugation to determine the available boron content. The detection limit of the method was 0.02mg/kg, the precision (RSD, n=12) was less than 3%, and the standard substances NSA-1, NSA-2, NSA-3, NSA-6 and GBW07497 (HTSB-5) and GBW07498 (HTSB-6) were tested, and the relative errors of the measurement results were all less than 4%, which was consistent with the recommended value.
CONCLUSIONS
This method can be used to determine available boron in soil with quick, efficient, safe and cost-effective potentials.
- available boron /
- soil /
- hot water bath /
- inductively coupled plasma-optical emission spectrometry

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References

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