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YC/T 245-2008 English PDF

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YC/T 245-2008: Tobacco and tobacco products. Determination of ammonia. Continuous flow method
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PDF similar to YC/T 245-2008


Standard similar to YC/T 245-2008

YC/T 246   GB 5606.2   GB/T 5606.1   YC/T 242   YC/T 253   YC/T 236   

Basic data

Standard ID YC/T 245-2008 (YC/T245-2008)
Description (Translated English) Tobacco and tobacco products. Determination of ammonia. Continuous flow method
Sector / Industry Tobacco Industry Standard (Recommended)
Classification of Chinese Standard X87
Classification of International Standard 65.160
Word Count Estimation 9,969
Date of Issue 2008-04-14
Date of Implementation 2008-04-14
Issuing agency(ies) State Tobacco Monopoly Administration
Summary This standard specifies the tobacco and tobacco products in the continuous flow of ammonia analysis. This standard applies to tobacco and tobacco products Determination of ammonia.

YC/T 245-2008: Tobacco and tobacco products. Determination of ammonia. Continuous flow method

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Tobacco and tobacco products.Determination of ammonia.Continuous flow method ICS 65.160 X87 Record Number. 23584-2008 People's Republic of China tobacco industry standards Tobacco and tobacco products Determination of ammonia continuous flow method Posted 2008-04-14 2008-04-14 implementation State Tobacco Monopoly Bureau issued

Foreword

The Standard Appendix A, Appendix B is an informative annex. This standard was proposed by the State Tobacco Monopoly Bureau. This standard by the National Standardization Technical Committee on Tobacco (TC144) centralized. This standard was drafted. National Tobacco Quality Supervision and Inspection Center, the tobacco industry in Shenzhen, Guangdong Tobacco Industries. The main drafters of this standard. Wang Fang, Zhang Wei, Wang Ying, Chen Zhihao, Konghao Hui, Xie Tao, Lin Shen light. Tobacco and tobacco products Determination of ammonia continuous flow method

1 Scope

This standard specifies the continuous flow analysis of tobacco and tobacco products in ammonia. This standard applies to the determination of tobacco and tobacco products in ammonia.

2 Normative 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 5606.1 cigarette - Part 1. Sampling General principles GB/T 19616 batches of raw tobacco samples (GB/T 19616-2004, ISO 4874.2000, MOD) Preparation and water YC/T 31 samples of tobacco and tobacco products - Determination oven method Principle 3 The water samples were extracted in alkaline buffer solution of salicylic acid and hypochlorous acid react with sodium nitroprusside [Na2Fe (CN) 5NO] The catalyst for the reaction, the reaction product at 660nm of the colorimetric determination.

4 Reagents and materials

4.1 Requirements Addition to special requirements, should use analytical grade reagents. Water should be distilled water or water of equivalent purity. 4.2 cleaning solution The 1mL30% of Brij35 (polyethoxylated lauryl ether, Astoria-Pacific # 90-0710-04 or equivalent material) was added to 1000mL water and mix. 4.3 20% sodium hydroxide solution Weigh about 200g of sodium hydroxide (of NaOH), was dissolved in 800mL of water, allowed to cool to room temperature, transferred to a 1000mL capacity Bottle with water to volume. 4.4 20% solution of sodium potassium tartrate Weigh about 200g potassium sodium tartrate (NaKC4H4O6), was dissolved in 800mL of water, allowed to cool to room temperature, transferred to 1000mL volumetric flask with water to volume. 4.5 buffer solution Weigh about 71g of disodium hydrogen phosphate (Na2HPO4), 20g of sodium hydroxide (NaOH), dissolved in water to 1000mL volumetric flask transferred Rear, left to cool to room temperature, add water to volume. At room temperature, a pH of about 12.2. 4.6 Working buffer solution Measure 250mL potassium sodium tartrate solution (4.4) was added to 200mL of buffer solution (4.5), and stirred while adding a hydrogen 250mL Sodium hydroxide solution (4.3). The mixture was transferred to a 1000mL volumetric flask, cooled to room temperature with water to volume, the number added when using Brij35 drops of 30% solution. At room temperature, a pH of about 13.7.

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