GB/T 38290-2019Determination of cadmium in plastic materials (English PDF)

1 Scope

This standard specifies the method for the determination of cadmium in plastic materials by inductively coupled plasma mass spectrometry.

This standard applies to the determination of cadmium in plastic materials and their products.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article

Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document.

GB/T 602 Preparation of standard solution for determination of impurities in chemical reagents

GB/T 6682 Analysis laboratory water specifications and test methods

GB/T 8170 Numerical Rounding Rules and Representation and Judgment of Limit Values

3 Principle

Crush the sample, weigh a certain amount of sample powder, use dry ashing method or microwave digestion, the digestion liquid is atomized by the carrier gas after being atomized

The body is desolvated, vaporized, dissociated and ionized in a high-temperature and inert argon atmosphere, converted into positively charged ions, and then enters the mass spectrometer.

The mass-to-charge ratio of the tested element is separated and characterized.For a certain mass-to-charge ratio, the signal intensity of the mass spectrum peak is positively related to the concentration of the element to be measured in the test solution

Than, using external standard method to quantify.

4 Reagent

Warning-tetrafluoroboric acid is highly corrosive and irritating, and can cause burns to the human body. Pay attention to protection during the dropping process.

Unless otherwise stated, the reagents used should be of superior grade pure and above, and the water used should meet the requirements of first-class water specified in GB/T 6682.