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Determination of lead, arsenic, cadmium, copper, iron content in tea for import and export. Inductively coupled plasma atomic emission spectrometric method
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SN/T 2056-2008
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Basic data | Standard ID | SN/T 2056-2008 (SN/T2056-2008) | | Description (Translated English) | Determination of lead, arsenic, cadmium, copper, iron content in tea for import and export. Inductively coupled plasma atomic emission spectrometric method | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | X55 | | Word Count Estimation | 7,758 | | Date of Issue | 2008-04-29 | | Date of Implementation | 2008-11-01 | | Quoted Standard | GB/T 602; GB/T 6682 | | Regulation (derived from) | Industry standard filing Notice 2008 No. 7 | | Issuing agency(ies) | General Administration of Customs | | Summary | This standard specifies the tea lead, arsenic, cadmium, copper, iron content by inductively coupled plasma atomic emission spectrometry method. This standard applies to tea lead, arsenic, cadmium, copper, iron content. | SN/T 2056-2008: Determination of lead, arsenic, cadmium, copper, iron content in tea for import and export. Inductively coupled plasma atomic emission spectrometric method
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Determination of lead, arsenic, cadmium, copper, iron content in tea for import and export.Inductively coupled plasma atomic emission spectrometric method
Exit inspection and quarantine industry standard book People's Republic of China
Tea Importers of lead, arsenic, cadmium, copper,
Determination of iron content
Inductively coupled plasma atomic emission spectrometry
Posted 2008-04-29
2008-11-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted. People's Republic of China Zhejiang Exit Inspection and Quarantine.
The main drafters of this standard. Dai Qi, Determination Of Bao Xiaoxia, Zhang Xiao radon.
This standard is the first release of the entry-exit inspection and quarantine industry standards.
Tea Importers of lead, arsenic, cadmium, copper,
Determination of iron content
Inductively coupled plasma atomic emission spectrometry
1 Scope
This standard specifies the determination by inductively coupled plasma atomic Tea lead, arsenic, cadmium, copper, iron content emission spectrometry methods.
This standard applies to lead, arsenic, cadmium, copper, iron content was measured tea.
2 References
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 602 Determination of impurities in chemical reagents prepared standard solution (GB/T 602-2002, ISO 6353-1. 1982, NEQ) with
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-1992, neq ISO 3696. 1987)
3 Method summary
Microwave digestion and samples were diluted to a certain volume after volume of the sample solution by the carrier gas into the plasma, and as the excitation light source,
Measuring the spectral intensity in the plasma spectrometer wavelength corresponding element, using the standard curve quantification.
4 Reagents and materials
Unless otherwise specified, the reagents were pure class distinctions, test water should meet the two water GB/T 6682 stipulated.
4.1 nitrate.
4.2 nitric acid solution (1 + 9). Take nitric acid (4.1) 10mL diluted with water to 100mL.
4.3 nitric acid solution (1 + 1). Take nitric acid (4.1) 50mL diluted with water to 100mL.
4.4 Hydrogen peroxide (30% aqueous solution).
4.5 single element standard stock solution. each element standard solution according to GB/T 602 method of preparation, or directly using a standard substance, its concentration
Are 1000μg/mL. Sealed and stored at room temperature.
4.6 mixed standard solution. Pipette respectively, lead, arsenic, cadmium single element standard stock solution (4.5) 1mL placed 1000mL volumetric flask,
Single element standard stock solution of copper, iron (4.5) 10mL placed in 100mL volumetric flask (4.2), respectively, with diluted nitric acid solution and dilute to
Scale were transferred to a clean polyethylene bottle after mixing, the solution containing lead were 1μg/mL of arsenic, cadmium and containing 100μg/mL of
Copper, iron, stored in a refrigerator 0 ℃ ~ 5 ℃ in.
4.7 Argon purity greater than or equal to 99.99%.
5. Apparatus
5.1 Inductively coupled plasma atomic emission spectrometer.
5.2 microwave digestion system.
5.3 mill.
6 Sample Preparation and Storage
All samples were fully mix, ground, through the aperture of 2.0mm round hole sieve, they are divided into two, loaded into a clean container as the test
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