General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB/T 42487-2023
Introduction
GB/T 42487-2023 Soil Quality - Determination of Nitrate Nitrogen, Nitrite Nitrogen, and Ammonium Nitrogen - Flow Analysis with Potassium Chloride Solution is a Chinese national standard that specifies a method for the determination of nitrate nitrogen, nitrite nitrogen, and ammonium nitrogen in soil using flow analysis with potassium chloride solution.
This standard provides guidelines for the preparation of soil samples, the extraction of nitrogen forms using potassium chloride solution, and the subsequent analysis using flow analysis techniques. The flow analysis method offers a high degree of automation, allowing for the simultaneous determination of multiple nitrogen forms in a large number of soil samples.
The determination of nitrate nitrogen, nitrite nitrogen, and ammonium nitrogen is crucial in assessing soil fertility and nutrient management. High levels of nitrate nitrogen and nitrite nitrogen in soil can indicate pollution from agricultural practices, while low levels of ammonium nitrogen can indicate nutrient deficiencies. Therefore, accurate and reliable measurement of these nitrogen forms is essential for sustainable agriculture and environmental protection.
The use of potassium chloride solution as the extracting agent in this method ensures the efficient extraction of nitrate nitrogen, nitrite nitrogen, and ammonium nitrogen from soil samples. The flow analysis technique offers advantages such as high sample throughput, reduced labor requirements, and improved precision and accuracy.
Overall, GB/T 42487-2023 provides a standardized and efficient method for the determination of nitrate nitrogen, nitrite nitrogen, and ammonium nitrogen in soil, contributing to the assessment and management of soil quality and agricultural practices.