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GB/T 22599-2008 English PDF

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GB/T 22599-2008: Water treatment chemicals -- Determination of arsenic content
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PDF similar to GB/T 22599-2008


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Basic data

Standard ID GB/T 22599-2008 (GB/T22599-2008)
Description (Translated English) Water treatment chemicals -- Determination of arsenic content
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G76
Classification of International Standard 71.040.40
Word Count Estimation 8,815
Date of Issue 2008-12-23
Date of Implementation 2009-09-01
Quoted Standard GB/T 602; GB/T 603; GB/T 6682
Regulation (derived from) National Standard Approval Announcement 2008 No.21 (Total No.134)
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 the method for the determination of water treatment chemicals arsenic content. This standard diethyl dithiocarbamate silver spectrophotometry for the determination of arsenic content in 1 ��g ~ 20 ��g (As) within the scope of the test solution, Gutzeit method applies to the determination of arsenic in 1 ��g ~ 5 ��g (As) within the range of the test solution.

GB/T 22599-2008: Water treatment chemicals -- Determination of arsenic content

---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.
Water treatment chemicals. Determination of arsenic content ICS 71.040.40 G76 National Standards of People's Republic of China Water treatment chemical method for the determination of arsenic Posted 2008-12-23 2009-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee of Chemical Water Treatment Chemicals Branch (SAC/TC63/SC5) centralized. This standard is drafted by. CNOOC Tianjin Chemical Research & Design Institute. The main drafters of this standard. Li Lin, Shao Hongqian, Bai Ying. Water treatment chemical method for the determination of arsenic

1 Scope

This standard specifies the method for the determination of water treatment chemicals arsenic content. This standard diethyl dithiocarbamate silver spectrophotometry for the determination of arsenic content in 1μg ~ 20μg (As) range Within the test solution; Gutzeit method for the determination of arsenic content in 1μg ~ 5μg (As) within the scope of the test solution.

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 602 Determination of impurities in chemical reagents prepared standard solution (GB/T 602-2002, ISO 6353-1. 1982, NEQ) with GB/T 603 chemical reagent in test methods - Preparations with (GB/T 603-2002, ISO 6353-1. 1982, NEQ) GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) 3-diethyl dithiocarbamate spectrophotometry silver 3.1 Method summary In acidic medium, with a zinc reduction of arsenic, arsine is generated (Evolving AsH3), pyridine was treated with diethyl dithiocarbamate silver absorbed, generating Purple soluble colloidal silver, the maximum absorption wavelength at 540nm, absorbance was measured. 3.2 Reagents and materials Reagent used in this method, unless otherwise specified, shall use analytical reagent and in line with GB/T 6682 stipulated three of water. Impurity standard solution, test preparation and products required, did not indicate when the other requirements, according to GB/T 602, GB/T 603 of Regulation Set preparation. Safety Tips. Some reagents used in the method of toxic or corrosive, dangerous part of the operation. This method does not disclose the Possible security problems, care should be taken and the user's responsibility to take appropriate safety and health practices. 3.2.1 arsenic-free zinc particles. 3.2.2 KI solution. 150g/L. 3.2.3 stannous chloride solution. Dissolving 40g of stannous chloride (SnCl2 · 2H2O) in a mixture of 25mL of water and 75mL hydrochloric acid. 3.2.4 diethyl dithiocarbamate silver [Ag (DDTC)] pyridine solution. 5g/L. Dissolving 1.25g diethyl dithiocarbamate silver in pyridine and diluted with pyridine to 250mL brown volumetric flask, to avoid the light Irradiation for a period of two weeks. 3.2.5 arsenic standard stock solution. 0.1mg/mL. 3.2.6 arsenic standard solution. 2.5μg/mL. Imbibe 2.50mL arsenic standard stock solution was placed in 100mL flask, diluted with water to the mark. This solution now With the existing service. 3.2.7 Lead acetate cotton.

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