GB/T 22105.3-2026Soil quality — Determination of total mercury, total arsenic and total lead — Atomic fluorescence spectrometry — Part 3: Determination of total lead in soil (English PDF)

3 Terms and definitions

4 Principle

5 Reagents and materials

6 Apparatus and equipment

7 Samples

8 Analytical procedure

9 Calculation and expression of the results

10 Quality assurance and quality control

11 Test report

12 Limit of detection and limit of quantification of the method

Foreword

This document was issued on 25 May 2026 by the State Administration for Market Regulation and the Standardization Administration of the People's Republic of China, and takes effect on 1 December 2026.

It replaces GB/T 22105.3-2008, which remains in force until that date.

The document is under the responsibility of the Ministry of Agriculture and Rural Affairs.

Classification: ICS 13.080.05, CCS Z 18.

3 Classification and status

GB/T 22105.3-2026 is classified under ICS 13.080.05, in the field of environment and health protection, safety. ICS is the International Classification for Standards, the same scheme used by ISO and by the national bodies of most countries, which is what allows a Chinese standard to be placed beside its foreign counterparts on subject rather than on number.

Its Chinese Standard Classification code is CCS Z 18. CCS is the domestic scheme, a letter for the sector and two digits for the subject within it, and it is the code by which the standard is filed and searched in China.

The GB/T prefix marks a recommended national standard. It is not, in itself, law: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it. In practice that covers most of the cases in which it will be read — a purchase specification, an inspection agreement or a certification scheme.

The document is under the responsibility of the Ministry of Agriculture and Rural Affairs, which is the body that maintains it and that will answer a formal question about its interpretation.