T/CAIA SH012-2020 "Determination of Cadmium in Rice Using Plasma Solidification and Direct Analysis in the Extraterrestrial Spectroscopy Method"

Scope

Scope: This standard specifies a screening method for determining the cadmium content in rice by plasma solid sample analysis emission spectrometry. This standard is applicable to the screening of cadmium content in rice and its products (brown rice, japonica rice, and rice flour). This standard includes the rapid determination of cadmium in rice, with a detection limit of 0.010 mg/kg and a quantification limit of 0.030 mg/kg. This standard can also be used for the quantitative determination of cadmium content in rice, with a quantification range of 0.030 mg/kg to 1.280 mg/kg. Main technical content: After hulling, the net rice is milled into rice flour, then mixed and compacted into a sample tray. The solid sample is directly exposed to and ablated by high-energy density plasma flame to obtain the emission spectra of cadmium in the solid sample. The determination is carried out based on the correlation between the intensity of the emission spectra and the cadmium content in the sample according to the calibration curve.

Development Information

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