GB/T 40175.1-2021 PDF EnglishUS$170.00 · In stock · Download in 9 seconds
GB/T 40175.1-2021: Textiles - Methods of biochemical analysis - Part 1: Cadmium and lead (colloidal gold 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 40175.1-2021: Textiles - Methods of biochemical analysis - Part 1: Cadmium and lead (colloidal gold 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/GBT40175.1-2021 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 59.080.01 CCS W 04 Textiles - Methods of biochemical analysis - Part 1: Cadmium and lead (colloidal gold method) ISSUED ON: MAY 21, 2021 IMPLEMENTED ON: DECEMBER 01, 2021 Issued by: State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Terms and definitions ... 4 4 Principle ... 4 5 Reagents and materials ... 5 6 Apparatus and equipment ... 6 7 Sample solution preparation ... 6 8 Sample determination ... 7 9 Test data processing ... 8 10 Precision ... 8 11 Detection limit ... 8 12 Test report ... 8 Appendix A (Normative) Performance evaluation requirements of heavy metal cadmium or lead rapid quantitative detection test strips ... 9 Appendix B (Informative) Examples of colloidal gold chromatography test strip result judgment ... 10 Textiles - Methods of biochemical analysis - Part 1: Cadmium and lead (colloidal gold method) WARNING: The personnel who uses this document shall have hands-on experience in formal laboratory work. This document does not address all possible security issues. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions which are set by the relevant national regulations.1 ScopeThis document specifies methods for the determination of extractable cadmium and lead content in textiles by the colloidal gold method. This document applies to the screening and determination of cadmium and lead in various textile products.2 Normative referencesThe contents of the following documents constitute the indispensable clauses of this document through normative references in the text. For dated references, only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document. GB/T 3922, Textiles - Tests for colour fastness - Colour fastness to perspiration GB/T 6682, Water for analytical laboratory use - Specification and test methods3 Terms and definitionsThere are no terms and definitions that need to be defined in this document.4 PrincipleThe cadmium and lead ions in the acidic sweat, after being chelated by the chelating agent, have a color reaction with colloidal gold particles that are labeled with cadmium and lead monoclonal antibodies. The color depth is c) Series mixed working solutions: respectively draw 1 mL of cadmium standard stock solution and 1 mL of lead standard stock solution in the same 100 mL volumetric flask; use water to dilute to the mark; the concentration of cadmium and lead in this solution are both 1 mg/L. Then, use water to respectively dilute to 0.005 mg/L, 0.01 mg/L, 0.02 mg/L. 5.13 Cadmium chelating agent solution: Dissolve 1 mg of cadmium chelating agent (5.3) in HBS buffer (5.9); completely dissolve; then, use the buffer (5.9) to dilute to 30 mL; set aside. 5.14 Lead chelating agent solution: Dissolve 1 mg of lead chelating agent (5.4) in 1 mL of dimethyl sulfoxide (5.10); completely dissolve; then, use the buffer (5.9) to dilute to 20 mL; set aside.6 Apparatus and equipment6.1 pH meter or pH test paper (1~14). 6.2 Balance: sensitivity of 0.01 g and 0.000 1 g. 6.3 Constant temperature water bath oscillator: The temperature control accuracy is ±1 °C; the oscillation frequency accuracy is ±1 time/min. 6.4 Vortex oscillator. 6.5 Timer: accurate to s. 6.6 Dry-type warm bath: The temperature control accuracy is ±1 °C. 6.7 Colloidal gold reader: It can measure and display the measurement results of colloidal gold quantitative test strips. 6.8 Heavy metal cadmium or lead rapid quantitative detection test strip: It is composed of gold-labeled micropores, test strips, and standard curve cards (codes); refrigerated storage is required; for specific storage conditions, refer to the instructions for use. Refer to Appendix A for the performance evaluation requirements of heavy metal cadmium or lead rapid quantitative detection test strips. 6.9 Erlenmeyer flask with stopper: 150 mL.7 Sample solution preparation7.1 Take a representative sample; cut it into small pieces below 5 mm × 5 mm; mix well; weigh two parts of 4 g of samples (for parallel testing), accurate to 0.01 g; place them in a Erlenmeyer flask with stopper (6.9); add 80 mL of acidic the content of cadmium or lead. The measurement step needs to be completed within 1 min. Note: The use of dry-type warm baths and colloidal gold readers of different manufacturers may be different; the operation shall be carried out according to the provisions of the product instructions.9 Test data processingThe content of cadmium and lead in the sample is automatically calculated and displayed by the reader. Take the average value of the two results, in milligrams per kilogram (mg/kg). Note: Samples, of which the result is judged to be invalid and positive, are further tested according to GB/T 17593.10 PrecisionIn the same laboratory, the same operator uses the same equipment, according to the same test method, and tests the same object under test independently in a short time. The absolute difference between the two independent test results obtained is not greater than 10% of the arithmetic mean of the two measured values, which is based on the condition that it does not exceed 5% for it to be greater than 10% of the arithmetic mean value of these two measured values.11 Detection limitThe detection limit of cadmium and lead in this method are both 0.1 mg/kg.12 Test reportThe test report shall at least give the following contents: a) documents used; b) sample source and description; c) test result; d) test date; e) any details that deviate from this document. ......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 40175.1-2021 be delivered?Answer: The full copy PDF of English version of GB/T 40175.1-2021 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 40175.1-2021_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 40175.1-2021_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 40175.1-2021 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.How to buy and download a true PDF of English version of GB/T 40175.1-2021?A step-by-step guide to download PDF of GB/T 40175.1-2021_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "GB/T 40175.1-2021". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
