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GB/T 23739-2026Soil quality — Determination of available lead and cadmium content in soils (English PDF)

土壤质量　有效态铅和镉的测定

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 30, 2026

Implementation date

February 1, 2027

Scope

GB/T 23739-2026 is the English-translated version of 土壤质量　有效态铅和镉的测定.

GB/T 23739-2026 is the Chinese standard "Soil quality — Determination of available lead and cadmium content in soils". Its scope clause reads: This document describes atomic absorption spectrometry and inductively coupled plasma mass spectrometry for the determination of available lead and cadmium in soil.

This document applies to the determination of available lead and cadmium in soil. Note. Users of this document should determine the accuracy requirements for their measurements based on the precision, accuracy, detection limit, and quantitation limit specified in the methods described herein.

Select the measurement method. Its clauses include terms and definitions; atomic absorption spectroscopy.

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Document preview — GB/T 23739-2026

National Standard of the People's Republic of China

ICS: 13.080.05
Classification: Z 18
Replacing: GB/T 23739-2009

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Atomic Absorption Spectroscopy
4.1 Principle
4.2 Reagents and Materials
4.3 Instruments and Equipment
4.4 Sample
4.6 Result Calculation
4.7 Precision and Accuracy
4.8 Limit of Detection and Limit of Quantification
4.9 Quality Control and Assurance
5.Inductively Coupled Plasma Mass Spectrometry 6.
5.1 Principle
5.2 Reagents and Materials
5.3 Instruments and Equipment
5.4 Sample
5.5 Analysis Steps
5.6 Result Calculation
5.7 Precision and Accuracy
5.8 Limit of Detection and Limit of Quantification
5.9 Quality Control and Assurance
6 Test Report
Appendix A (Informative) Reference Conditions for Atomic Absorption Spectrometers
Appendix B (Informative) Reference Conditions for Inductively Coupled Plasma Mass Spectrometer

1 Scope

This document describes atomic absorption spectrometry and inductively coupled plasma mass spectrometry for the determination of available lead and cadmium in soil.

This document applies to the determination of available lead and cadmium in soil.

Note. Users of this document should determine the accuracy requirements for their measurements based on the precision, accuracy, detection limit, and quantitation limit specified in the methods described herein.

Select the measurement method.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 603 Preparation of reagents and products used in chemical reagent test methods

GB/T 37885 Classification of Chemical Reagents

HJ613 Determination of Soil Dry Matter and Moisture by Gravimetric Method

NY/T 1121.1 Soil Testing - Part 1.Collection, Processing and Storage of Soil Samples

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Available lead

Lead in the soil that can be absorbed and utilized by plant roots.

Note. This document refers to lead extracted using diethylenetriaminepentaacetic acid (DTPA) extractant under the extraction conditions specified in this document.

3.2 Available cadmium

Cadmium in the soil that can be absorbed and utilized by plant roots.

Note. This document refers to cadmium extracted using DTPA extractant under the extraction conditions specified in this document.

4 Atomic Absorption Spectroscopy

4.1 Principle

DTPA complexing agent has a strong ability to react with heavy metals, and can rapidly form water-soluble compounds with lead and cadmium ions in the soil. (Sample)

Lead and cadmium are converted into ground-state atoms at high temperatures. Under the illumination of a specially designed hollow cathode lamp, the gaseous ground-state metal atoms absorb specific wavelengths.

The more ground-state atoms in the optical path that transition to a higher energy level, the greater the absorption of their characteristic radiation energy, and the more closely they interact with the atom.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Editions of GB/T 23739

Edition	Title	Revision	Status
GB/T 23739-2026	Soil quality — Determination of available lead and cadmium content in soils	current edition	Current
GB/T 23739-2009	Soil quality — Determination of available lead and cadmium content in soils	previous edition	In force until 1 February 2027

This page sells the current edition, GB/T 23739-2026. Earlier editions are listed for reference only.

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