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GB/T 29599-2013 English PDF

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GB/T 29599-2013: Textile dyeing and finishing auxiliaries -- Determination of chemical oxygen demand (COD)
Status: Valid
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GB/T 29599-2013English279 Add to Cart 3 days [Need to translate] Textile dyeing and finishing auxiliaries -- Determination of chemical oxygen demand (COD) Valid GB/T 29599-2013

PDF similar to GB/T 29599-2013


Standard similar to GB/T 29599-2013

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Basic data

Standard ID GB/T 29599-2013 (GB/T29599-2013)
Description (Translated English) Textile dyeing and finishing auxiliaries -- Determination of chemical oxygen demand (COD)
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G70
Classification of International Standard 71.100.40
Word Count Estimation 12,119
Quoted Standard GB/T 6682-2008; GB/T 8170-2008; GB/T 11896
Regulation (derived from) National Standards Bulletin 2013 No. 10
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies: Textile dyeing and finishing auxiliaries chemical oxygen demand (COD) measurement methods. This standard applies not have oxidation, reduction textile dyeing and finishing auxiliaries chemical oxygen demand (COD) measured. The sta

GB/T 29599-2013: Textile dyeing and finishing auxiliaries -- Determination of chemical oxygen demand (COD)


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Textile dyeing and finishing auxiliaries.Determination of chemical oxygen demand (COD) ICS 71.100.40 G70 National Standards of People's Republic of China Textile dyeing and finishing auxiliaries chemical oxygen demand (COD) determination Determinationofchemicaloxygendemand (COD) Issued on. 2013-07-19 2013-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee of dye auxiliaries Technical Committee (SAC/TC134/SC1) centralized. This standard was drafted. Zhejiang Chuan Co., Ltd., Hangzhou-Fine Chemical Co., Ltd. The main drafters of this standard. High-Hui Lin, of Orange, Zhao Mei, Fu Jia Asia. Textile dyeing and finishing auxiliaries chemical oxygen demand (COD) determination

1 Scope

This standard specifies the textile dyeing and finishing auxiliaries chemical oxygen demand (COD) determination method. This standard applies to having no oxidation, reducing textile dyeing and finishing auxiliaries chemical oxygen demand (COD) determination. This standard spectrophotometric method for quick, dichromate law arbitration law.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 6682-2008 analytical laboratory use specifications and test methods (ISO 3696. 1987, MOD) GB/T 8170-2008 revised value represents about rules and limit values and judgment GB/T 11896 Water quality - Determination of chloride - Silver nitrate titration method 3 a method (spectrophotometry) 3.1 Principle Sample a known amount of potassium dichromate solution in concentrated sulfuric acid medium with silver sulphate as a catalyst, high temperatures after digestion with a spectrophotometer Determination of COD value of the method. When the COD value of the sample at 100mg/L ~ 1000mg/L, measured in nm wavelength (620 ± 10) was produced by the reduction of potassium dichromate The added value of trivalent chromium (Cr3) absorbance, COD value of the sample and trivalent chromium (Cr3) absorbance proportional to trivalent chromium (Cr3) absorbance value of the sample in terms of COD. When the sample COD value in 15mg/L ~ 250mg/L, at (440 ± 10) nm wavelength potassium dichromate hexavalent unreduced The total absorbance of chromium (Cr6) and trivalent chromium reduction generated (Cr3) two chromium ions; in the sample COD value (Cr6) absorbance Reduction value is proportional, and trivalent chromium (Cr3) is proportional to the absorbance value added, reducing the total value of the absorbance is proportional to the total absorbance COD value in terms of value of the sample. 3.2 Reagents and materials Unless otherwise specified, use water only confirm three analytical grade reagents and GB/T 6682-2006 stipulated. 3.2.1 sulfuric acid solution, 19 (volume ratio). 3.2.2 silver sulphate - sulfuric acid solution, 10g/L. Weigh 5.0g silver sulfate, sulfuric acid was added to 500mL standing for 1 to 2 days, stirring the mixture to Dissolved. 3.2.3 Potassium dichromate standard titration solution (see Appendix A) 3.2.3.1 Potassium dichromate standard titration solution, c (16K2Cr2O7 ) = 0.5000mol/L. 3.2.3.2 Potassium dichromate standard titration solution, c (16K2Cr2O7 ) = 0.1600mol/L. 3.2.4 pre-mixed reagent

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