YC/T 373-2010 PDF EnglishUS$145.00 · In stock · Download in 9 seconds
YC/T 373-2010: Determination of benzene, toluene, ethylbenzene and xylene in polypropylene fiber tow and polypropylene fiber tow filter rod - Gas chromatography-mass spectrometry 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
YC/T 373-2010: Determination of benzene, toluene, ethylbenzene and xylene in polypropylene fiber tow and polypropylene fiber tow filter rod - Gas chromatography-mass spectrometry 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/YCT373-2010 YC TOBACCO INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 65.160 X 85 Record number: 30430-2011 Determination of benzene, toluene, ethylbenzene and xylene in polypropylene fiber tow and polypropylene fiber tow filter rod - Gas chromatography-mass spectrometry method ISSUED ON: DECEMBER 01, 2010 IMPLEMENTED ON: JANUARY 01, 2011 Issued by: State Tobacco Monopoly Administration Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Principle ... 4 4 Reagents ... 4 5 Instrument, equipment and conditions ... 6 6 Analysis steps ... 7 7 Calculation and expression of results ... 8 8 Recovery rate, detection limit and quantification limit ... 9 9 Test report ... 9 Appendix A (Informative) Example chromatogram ... 10 Determination of benzene, toluene, ethylbenzene and xylene in polypropylene fiber tow and polypropylene fiber tow filter rod - Gas chromatography-mass spectrometry method1 ScopeThis Standard specifies the determination method of benzene, toluene, ethylbenzene and xylene in polypropylene fiber tow and polypropylene fiber tow filter rod -- Gas chromatography-mass spectrometry method. This Standard applies to the determination of benzene, toluene, ethylbenzene and xylene in polypropylene fiber tow and polypropylene fiber tow filter rod.2 Normative referencesThe following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document. GB/T 15270-2001, Tobacco and tobacco products - Polypropylene fiber tow filter rod YC/T 27-2002, Polypropylene fiber tow for cigarette3 PrincipleUse the n-pentane solution that contains internal standard substance to extract benzene, toluene, ethylbenzene and xylene in the sample; use the gas chromatography-mass spectrometry method to determine the content of benzene, toluene, ethylbenzene and xylene in the extract; then, calculate the residual amount of benzene, toluene, ethylbenzene, and xylene in the sample.4 ReagentsExcept for special requirements, analytical reagents shall be used. 4.1 Reagents 4.1.1 N-hexane (C6H14), Super Pure grade or pesticide residue grade. 4.1.2 N-pentane (C5H12), chromatographic grade. 4.1.3 Benzene (C6H6), purity ≥99%. 4.1.4 Toluene (C7H8), purity ≥99%. 4.1.5 Ethylbenzene (C8H10), purity ≥99%. 4.1.6 O-xylene (o-C8H10), purity ≥99%. 4.1.7 M-xylene (m-C8H10), purity ≥99%. 4.1.8 P-xylene (p-C8H10), purity ≥99%. 4.1.9 2-hexanone (internal standard), if other substances are used as internal standard, the applicability shall be verified. 4.2 Preparation of internal standard solution 4.2.1 Internal standard stock solution: weigh 0.1 g of 2-hexanone (4.1.9) (accurate to 0.1 mg) in a 50 mL volumetric flask; use n-hexane (4.1.1) to dilute to the mark; mix well, to obtain an internal standard stock solution whose concentration is 2 mg/mL. Seal and store the internal standard stock solution in a refrigerator at 0 °C ~ 4 °C; the validity period is 3 months. 4.2.2 Internal standard solution: accurately pipette 2.5 mL of internal standard stock solution (4.2.1) into a 50 mL volumetric flask; use n-hexane (4.1.1) to dilute to the mark; mix well to obtain an internal standard solution whose concentration is 100 μg/mL. Seal and store the internal standard solution in a refrigerator at 0 °C ~ 4 °C; the validity period is 1 month. 4.3 Preparation of standard solution 4.3.1 Mixed standard stock solution: respectively weigh 0.1 g of benzene (4.1.3), toluene (4.1.4), ethylbenzene (4.1.5), o-xylene (4.1.6), m-xylene (4.1.7), p- xylene (4.1.8) (accurate to 0.1 mg) in the 100 mL volumetric flasks; use n- hexane (4.1.1) to dissolve them and dilute to the mark; mix well, to obtain the mixed standard stock solution, of which the concentration of each component is 1 mg/mL, respectively. Seal and store the mixed standard stock solution in a refrigerator at 0 °C ~ 4 °C; the validity period is 3 months. 4.3.2 Mixed standard solution: use n-hexane (4.1.1) to gradually dilute the mixed standard stock solution (4.3.1) to obtain a mixed standard solution whose concentration is 5 μg/mL. Formulate this solution when needed. Perform selective ion scanning on the standard working solution; calculate the peak area ratio of benzene, toluene, ethylbenzene, and xylene in each standard solution to the internal standard 2-hexanone; draw the standard working curve of concentration-to-peak area ratio of benzene, toluene, ethylbenzene and xylene. The standard working curve shall be straight line relationship; the correlation coefficient shall be R2 >0.99. A standard working curve shall be made for each test. After every 20 samples, add a medium-concentration standard working solution. If the measured value differs from the original value by more than 10%, the standard working curve shall be made again. 6.5 Sample determination Measure the sample solution (6.2) according to the instrument test conditions; repeat the measurement twice for each sample. At the same time, make a set of blanks for each batch of samples.7 Calculation and expression of resultsCalculate the residual amount (X) of benzene, toluene, ethylbenzene, p-xylene, m-xylene and o-xylene in the sample according to Formula (1): Where: X -- the residual amount of benzene, toluene, ethylbenzene, p-xylene, m-xylene and o-xylene in the sample, in milligrams per kilogram (mg/kg); c -- the concentration of benzene, toluene, ethylbenzene, p-xylene, meta- xylene and o-xylene in the sample solution that is read from the standard working curve, in micrograms per milliliter (μg/mL); c0 -- the concentration of benzene, toluene, ethylbenzene, p-xylene, m-xylene and o-xylene in the blank test that is read from the standard working curve, in micrograms per milliliter (μg/mL); m -- sample mass, in grams (g). The final residual amount of xylene in the sample is the sum of the residual amounts of p-xylene, m-xylene and o-xylene. Take the average of two parallel determinations as the final determination result, accurate to 0.01 mg/kg. ......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 YC/T 373-2010 be delivered?Answer: The full copy PDF of English version of YC/T 373-2010 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 YC/T 373-2010_English with my colleagues?Answer: Yes. The purchased PDF of YC/T 373-2010_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 -- YC/T 373-2010 -- 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 YC/T 373-2010?A step-by-step guide to download PDF of YC/T 373-2010_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 "YC/T 373-2010". 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 |
