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LS/T 6134-2018

Chinese Standard: 'LS/T 6134-2018'
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LS/T 6134-2018English109 Add to Cart Days<=3 Inspection of grain and oils. Determination of cadmium in cereals. Diluted acid extraction coupled with graphite furnace atomic absorption spectrophotometer Valid LS/T 6134-2018
LS/T 6134-2018Chinese16 Add to Cart <=1-day [PDF from Chinese Authority, or Standard Committee, or Publishing House]  

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Detail Information of LS/T 6134-2018; LS/T6134-2018
Description (Translated English): Inspection of grain and oils. Determination of cadmium in cereals. Diluted acid extraction coupled with graphite furnace atomic absorption spectrophotometer
Sector / Industry: Food & Beverage Industry Standard (Recommended)
Word Count Estimation: 5,550
Date of Issue: 2018-04-09
Date of Implementation: 2018-07-01
Quoted Standard: GB/T 602; GB/T 5491; GB/T 6682
Drafting Organization: National Food Bureau Science Research Institute
Administrative Organization: National Grain and Oil Standardization Technical Committee
Regulation (derived from): State-Grain-Communication (2018) 2
Proposing organization: National Food and Material Reserve Board
Issuing agency(ies): National Food and Material Reserve Board


LS/T 6134-2018
(Grain and oil inspection Rapid determination of cadmium in grain Dilute acid extraction-graphite furnace atomic absorption spectrometry)
ICS 67.060
X11
People's Republic of China food industry standard
Rapid determination of cadmium in grain by grain and oil
Dilute acid extraction-graphite furnace atomic absorption spectrometry
Inspectionofgrainandoils-Determinationofcadmiumincereals-
Dilutedacidextractioncoupledwithgraphitefurnaceatomicabsorption
Spectrophotometer
Published on.2018-04-09
2018-07-01 implementation
National Food and Material Reserve Bureau released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the National Grain and Material Reserve Bureau.
This standard is under the jurisdiction of the National Grain and Oil Standardization Technical Committee (SAC/TC270).
This standard was drafted. Scientific Research Institute of the State Grain Administration, Standard Quality Center of the State Grain Administration, and Grain Quality Supervision of the Ministry of Agriculture and Rural Affairs.
Testing Center, Hunan Grain and Oil Product Quality Monitoring Center, Tianjin National Grain Quality Monitoring Center, Hebei Grain and Oil Quality Testing Center, Ji
Linshui Cereals and Oils Hygiene Inspection and Monitoring Station, Shanghai National Grain Quality Monitoring Center, Xiamen Grain and Oil Quality Supervision Station, Wuhan Cereals, Oils and Foodstuffs Center
Inspection station, Harbin sub-station of Heilongjiang Provincial Cereals and Oils Hygiene Inspection and Monitoring Station, Changchun Grain and Oil Hygiene Inspection and Monitoring Station, and quality of grain and oil products in Zhejiang Province
Inspection Center, Chongqing National Grain Quality Monitoring Center, Daqing Grain Quality Inspection and Monitoring Station, Xi'an Grain and Oil Quality Inspection Center, Suzhou City
Grain and Oil Quality Monitoring Institute, Lianyungang Grain and Oil Quality Monitoring Institute, Beijing Agricultural Product Quality Testing and Farmland Environmental Monitoring Technology Research Center.
The main drafters of this standard. Wang Songxue, Zhou Minghui, Wu Yanxiang, Zhang Jieqiong, Yang Weimin, Luo Qian, Lu Meibin, Yan Shimin, Wang Jinwei,
Tan Junfeng, Cong Wei, He Zhijun, Yang Tianbao, Liu Bo, Zhang Yadong, Cui Wei, Du Wenkai, Zou Yong, Zhou Xun, Zhao Jia, Zhu Qingyi, Fang Hongbing,
Lu Anxiang, Chen Yu.
Rapid determination of cadmium in grain by grain and oil
Dilute acid extraction-graphite furnace atomic absorption spectrometry
1 Scope
This standard specifies the principle, reagents and solutions, instruments and equipment for the determination of cadmium in grains by dilute acid extraction-graphite furnace atomic absorption spectrometry.
Analyze steps, result calculations, and precision.
This standard applies to the determination of cadmium in grain, grain and milled products such as wheat, corn and rice.
The detection limit of cadmium in this standard is 0.0006mg/kg, and the limit of quantification is 0.0021mg/kg.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
Preparation of standard solution for GB/T 602 chemical reagent impurity determination
GB/T 5491 Inspection of food and oil materials, sample method
GB/T 6682 Analytical laboratory water specifications and test methods
3 Principle
After the sample is pulverized, the cadmium is extracted by shaking with dilute nitric acid, and determined by graphite furnace atomic absorption spectrometry. The standard curve method is used to calculate the cadmium in the sample.
content.
4 reagents and solutions
Note. Unless otherwise stated, all reagents are of analytical grade and water should meet the requirements of Class I water in GB/T 6682.
4.1 Reagents
4.1.1 Nitric acid (HNO3). excellent grade pure.
4.1.2 Palladium nitrate [Pd(NO3)2] hydrate. purity is 99.9%.
4.2 Reagent preparation
4.2.1 Nitric acid solution (0.5%, volume fraction). Take 0.5 mL of nitric acid (4.1.1) to a volume of 100 mL.
4.2.2 100 mg/L palladium nitrate. 0.1 g of palladium nitrate (4.1.2) was dissolved in 0.5% nitric acid (4.2.1) and made up to 1000 mL.
4.3 Standards
The standard solution of cadmium is 1000mg/L (or 500mg/L), and can also be prepared according to GB/T 602 method.
4.4 Preparation of standard solution
4.4.1 Standard stock solution. Dilute the cadmium standard solution (4.3) to 100 μg/L with a nitric acid solution (4.2.1).
Related standard:   LS/T 6133-2018  LS/T 6135-2018
   
 
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