Standard reference materials for sulfide analysis in soil

Standard reference materials for sulfide analysis in soilThis standard substance is applicable tosoilin the environmentsulfideThe research and monitoring of methods are of great significance and can be used for precision evaluation, instrument calibration, and quality control in related analytical testing in fields such as agriculture, geology, environmental protection, and health.

Onesample preparation

Selection of this standard substance含硫化物Soil is the matrix,exceptRemove impuritiesGrinding and high-speed mixingWait for special homogenization methods, after dryingDivide the samples into clean room packagespolyethylenein the bottle, throughCo⁶⁰Radiation sterilizationStore away from light.

IICharacteristic values and uncertainties

The uncertainty assessment of the characteristic values of this standard substance mainly considersThe uncertainty components introduced by the joint calibration of multiple laboratories, as well as the uncertainty components introduced by the uniformity and stability tests of standard materials.

IIIUniformity testing and stability assessment

Refer to national standard materialsrelatedTechnical specification requirements,Combining standardsHJ 1459-2026 《Soil and sediment Determination of sulfides Iodometric methodHow to translateRandomly select standard substance samples after packaging, and use20Iodometric methodConduct uniformity and stability tests, with a minimum sampling size of2g

The results indicate that the series of standard materials have good uniformity and stability. The validity period of this standard substance is from the date of self determinationYear. The research and development unit will continue to track and test the stability of the standard substance. If any changes in the value are found within the validity period, the user will be notified in a timely manner.

4Traceability and value determination methodsThis standard substance uses multiple methodshomeAssign values through laboratory joint calibration method.The fixed value method is standardHJ 1459-2026ofIodometric method

，By using measurement methods and instruments that meet the requirements of metrological characteristics, the traceability of characteristic values of standard substances is ensured.

fivePackaging, storage, and useStandard reference materials for sulfide analysis in soilThis standard substance is based onpolyethylene20bottleEncapsulation, per bottle6g，bottle/20Set.Store in a dark, clean, and room temperature place; Strictly prevent contamination during opening and use. The minimum sampling size is specified asg，Single-use Please do not use below this sampling amount.Due to the significant impact of temperature and other environmental conditions on sulfides, as well as inconsistent laboratory conditions, please use them as soon as possible.This standard substance is a hazardous substance and should be used with cautiondo wellprotection