T/CAIA SH011-2018 Active Group standards

T/CAIA SH011-2018 Determination of Cadmium in Cereals by Extraction with Acidic Solution and Flame Atomic Fluorescence Spectrometry

Publish Date: 2018-07-27 Implement Date: 2018-09-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/CAIA SH011-2018

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Food processing and products

ICS Name: The experimental conditions and procedures are summarized here

Publish Date: 2018-07-27

Implement Date: 2018-09-01

Scope

Scope: This standard specifies the method of extracting cadmium from grains with dilute acid and determining it by flame atomic fluorescence spectrometry. This standard is applicable to the determination of cadmium in brown rice, rice, wheat, and corn. Calculated based on a sample weight of 0.5g and a final volume of 20 mL, the method's detection limit is 0.136 μg/kg, and the quantification limit is 0.408 μg/kg. Main technical content: Flame atomic fluorescence spectrometry involves directly introducing the solution to be tested into the transport chamber by pneumatic atomization, mixing it with fuel gas in the transport chamber to form an aerosol, and transporting it to an arrayed flame convergent atomizer to atomize the elements to be tested. After atomization, the atoms are excited by a high-intensity characteristic line light source (double cathode hollow cathode lamp), causing energy level transitions in the atoms to be tested. During the deactivation process, the atoms release atomic fluorescence, and the intensity of the atomic fluorescence signal of the atoms to be tested is proportional to their concentration, which serves as the basis for quantifying the elements to be tested.