Perfluorooctylcarboxylic acid and octylsulfonic acid in soil

This standard substance is mainly based onPerfluorooctylcarboxylic acid (PFOA) and perfluorooctylsulfonic acid (PFOS) in soilDeveloped for content detection and daily sample content requirements, it can be used as a method for precision evaluation and quality control in related analysis and testing processes.

1. Sample preparation:
This standard substance is based on soil and undergoes homogenization methods such as sterilization and impurity removal during the preparation process. After low-temperature drying, the samples are packaged in glass bottles in a clean room and stored away from light.
2. Characteristic values and uncertainties:

The uncertainty assessment of the characteristic values of this standard substance mainly considers the uncertainty components introduced by the joint determination of multiple laboratories, as well as the uncertainty components introduced by the uniformity and stability tests of the standard substance.
3. Uniformity and stability:
According to the requirements of JJF1343-2022 "Evaluation of Calibration, Uniformity, and Stability of Standard Substances", randomly selected standard substance samples after packaging were tested for homogeneity and stability using liquid chromatography tandem secondary mass spectrometry (LC-MS-MS), with a minimum sample size of 2g. The results showed that the uniformity and stability of this series of standard substances were good.
4. Traceability and valuation methods:
This standard substance is assigned values using a multi laboratory calibration method, which is liquid chromatography tandem mass spectrometry (LC-MS-MS). Refer to the "Determination of Perfluorooctylsulfonic Acid (PFOS) and Perfluorooctylcarboxylic Acid (PFOA) in Soil and Sediments, Liquid Chromatography Triple Quadruple Rod (Draft for Comments)" for testing. By using measurement methods and instruments that meet the requirements of metrological characteristics, the traceability of characteristic values of standard substances is ensured.
5. Packaging, Storage, and Use:
This standard substance is packaged in glass bottles, with 40g per bottle, and stored in a dark, clean, dry, and room temperature place. During opening and use, strict measures should be taken to prevent contamination. The minimum sampling amount is 2g, please do not use below this sampling amount.
Perfluorooctylsulfonic acid (PFOS) and perfluorooctylcarboxylic acid (PFOA) in soilQuality control substancesFor more information, please searchZhongyuan Standard Material Center (Henan Detong Environmental Protection Technology Co., Ltd.)Contact customer service!

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