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GB/T 28020-2011: Adornment -- Determination of baneful elements -- X-ray fluorescence spectrometric method Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 28020-2011: Adornment -- Determination of baneful elements -- X-ray fluorescence spectrometric method---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT28020-2011 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 39.060 Y 88 Adornment - Determination of Baneful Elements - X-ray Fluorescence Spectrometric Method Issued on. OCTOBER 31, 2011 Implemented on. FEBRUARY 1, 2012 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 1 Scope... 4 2 Normative References... 4 3 Principle and Method... 4 4 Instruments and Apparatus... 5 5 Test Methods and Requirements... 5 6 Factors Affecting the Testing Results... 5 7 Determination of Results... 6ForewordThis Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard was proposed by the China National Light Industry Council. This Standard shall be under the jurisdiction of the National Technical Committee of Jewelry Standardization (SAC/TC 256). Drafting organizations of this Standard. National Center of Quality Supervision & Inspection on Gold-Silver Products (Shanghai), National Jewelry Quality Supervision and Inspection Center AND Jiangsu Tianrui Instrument Co., Ltd. Main drafters of this Standard. Wu Yiyang, Xie Qiyao, Li Suqing, Chen Dingying, Huang Guofang, Li Wujun AND Yao Dongliang. Adornment - Determination of Baneful Elements - X-ray Fluorescence Spectrometric Method1 ScopeThis standard specifies the X-ray fluorescence spectrometric detection method of baneful elements in adornment. This standard applies to the detection of baneful elements in the surface layer of the adornment made in various materials (except jewelry and jade).2 Normative ReferencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard. GB 28480 Adornment - Provision for Limit of Baneful Elements GB/T 28019 Adornment - Determination of Chromium (VI) – 1,5- Diphenylcarbohydrazide spectrophotometric method3 Principle and MethodPrinciple of this method is as follows. surface layer of adornment can be excited by X- ray; it can emit characteristic X-ray. Energy of characteristic X-ray corresponds to each specific element.4 Instruments and ApparatusX-ray fluorescence spectrum analyzer Manganese is at the peak of 5.89 keV energy position, the resolution shall at least be 170 eV.5 Test Methods and Requirements5.1 Calibration-Verification for the Instrument Perform calibration-verification according to specific requirements of the instruments. 5.2 Testing Conditions 5.3 Testing methods and Results Representation 5.3.1 The quantity of selected testing points shall not be less than three.6 Factors Affecting the Testing Results- For the sample to be tested, there is plating on its surface OR its surface has been chemically treated; - Detection time; - Shape of the sample; - Detection area for the sample; - Degree of uniformity of the sample to be tested; - Interference of the spectrum between the matrix and the baneful elements of the sample to be tested; - Other influencing factors.7 Determination of Results7.1 As the decrease of the content (w) of the tested baneful elements, error of measurement result will increase. For the instrument, the higher of its detection limit (3σ) for harmful elements, the greater the error of measurement result will be. 7.3 In light of that most of the adornments have the characteristics of metal, for the analytical correction coefficients of baneful elements’ maximum limit, it is recommended to choose 30%. Therefore. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 28020-2011 be delivered?Answer: The full copy PDF of English version of GB/T 28020-2011 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 28020-2011_English with my colleagues?Answer: Yes. 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