Standard substances for petroleum analysis in soil

Standard substances for petroleum analysis in soilThis standard substance is applicable tosoilin the environmentPetroleum contentThe 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 substanceOil pollutionSoil is the matrix,exceptRemove impuritiesGrinding and high-speed mixingWait for special homogenization methods, after dryingDivide the samples into clean room packagesglass bottlemiddle, throughCo⁶⁰radiation sterilization, inlight-proofandlow temperaturepreservation.

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 standardsHJ1051-2019《soil Determination of petroleum products Infrared spectrophotometryHow to translate,Randomly select standard substance samples after packaging, and useinfrared5SpectrophotometryConduct uniformity and stability tests, with a minimum sampling size ofgThe results indicate that the series of standard materials have good uniformity and stability. The standard substance has a validity period from the date of self determination3tentative

forYear. 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 isInfrared spectrophotometry

，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 substances for petroleum analysis in soilThis standard substance is based on100glass bottleEncapsulation, per bottleg, avoiding lightAnd low4warm（℃~15℃）ChubaoStorage; Strictly prevent contamination during opening and use5And dampness; Preventing static electricity during winter weighingThe minimum sampling size is specified as