GB/T 29607-2013Rubber product - Determination of cadmium content - Atomic absorption spectrometry (English PDF)

1 Scope

This standard specifies the method of atomic absorption spectrometry rubber products using cadmium content.

This standard applies to the determination of cadmium in rubber products, especially rubber tires measured cadmium content.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein

Member. For undated references, the latest edition (including any amendments) applies to this document.

Determination of GB/T 4498 Rubber ash

Preparation of chemical test GB/T 17783 vulcanized rubber samples and specimens

Principle 3

Halogen-free samples by dry ashing. Halogen-containing sample with sulfuric and nitric acid for processing, after evaporation of residual acid ashing. Ash and

Ammonium acetate dissolved cadmium tomatoes. If there exists an insoluble silicate, use of hydrochloric acid, nitric acid and hydrogen peroxide are boiled together, conversion to the chloride.

After sample dissolution, a solution of appropriate concentration configured, cadmium hollow cathode lamp as the light source, the wavelength corresponding to the absorbance measurement. According to the same article

Cadmium standard working curve member determined the content of the sample is calculated corresponding elements.

4 Reagents

5 Instruments