GB/T 14422-2008 English PDF

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GB/T 14422-2008: Analysis of water used in boiler and cooling system -- Determination of benzotriazole
Status: Valid

GB/T 14422: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 14422-2008	139	Add to Cart	3 days	Analysis of water used in boiler and cooling system -- Determination of benzotriazole	Valid
GB/T 14422-1993	199	Add to Cart	2 days	Analysis of water used in boiler and cooling system. Determination of benzotriazole. Ultraviolet spectrophotometry	Obsolete

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GB/T 14637   GB/T 14636   GB/T 15453   GB/T 14420   GB/T 14427   GB/T 14420   

Basic data

Standard ID: GB/T 14422-2008 (GB/T14422-2008)
Description (Translated English): Analysis of water used in boiler and cooling system -- Determination of benzotriazole
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G76
Classification of International Standard: 71.040.40
Word Count Estimation: 6,615
Date of Issue: 2008-04-01
Date of Implementation: 2008-09-01
Older Standard (superseded by this standard): GB/T 14422-1993
Quoted Standard: GB/T 6682
Regulation (derived from): National Standard Approval Announcement 2008 No.5 (Total No.118)
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 determination of the boiler water and cooling water benzo triazole. This standard applies to cold water and cooling water inside the generator Benzotriazole benzene content of 0. 5mg/L ~ 5mg determination/L of.

GB/T 14422-2008: Analysis of water used in boiler and cooling system -- Determination of benzotriazole

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Analysis of water used in boiler and cooling system. Determination of benzotriazole ICS 71.040.40 G76 National Standards of People's Republic of China Replacing GB/T 14422-1993 Boiler water and cooling water analysis Determination of benzene Benzotriazole Posted 2008-04-01 2008-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard replaces GB/T 14422-1993 "boiler water and cooling water analysis benzene Benzotriazole UV spectrophotometric determination Law degree. " This standard and GB/T 14422-1993, compared, no differences in technical content, structure and main text of the standard was part modify. Appendix A of this standard is a normative appendix. 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. Tianjin Chemical Engineering Research and Design Institute, Sinopec water treatment chemicals assessment center. The main drafters of this standard. Jindong, Shaohong Qian, Li Lin. This standard replaces the standard release case. --- GB/T 14422-1993. Boiler water and cooling water analysis Determination of benzene Benzotriazole

1 Scope

This standard specifies the determination of boiler water and cooling water of benzene Benzotriazole. This standard applies to cold water and cooling water inside the generator Benzotriazole benzene content of 0.5mg/L ~ 5mg Determination/L of.

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 6682 analytical laboratory use specifications and test methods (GB/T 6682-1992, neq ISO 3696. 1987)

3 Method summary

Benzene Benzotriazole has two maximum absorption peak at 259nm and 268nm place. Organics in water samples also absorb at 259nm, so instead Directly measured at 268nm, and no benzene was concentrated and add water after using Benzotriazole as a blank control solution, in order to eliminate such interference.

4 Reagents and materials

The reagents used in this standard, unless otherwise stated, use only analytical reagent. Safety Tips. strong base used in this standard is corrosive, should pay attention. When contacted, rinse with plenty of water, avoid inhaling Or contact with the skin. 4.1 Water, GB/T 6682, three. 4.2 Potassium hydroxide solution. 56g/L. 4.3 benzene Benzotriazole Standard Solution. 100mg/L. Weigh 0.1000g benzene Benzotriazole, accurate to 0.2mg. 1mL potassium hydroxide solution was added, and dissolved, and then transferred to a 1L Volumetric flask, and diluted with water to the mark. This solution 1mL containing 0.1mg benzene Benzotriazole.

5 instruments and equipment

The following general laboratory instruments and equipment. 5.1 UV - visible spectrophotometer. 5.2 quartz absorption cell. 1cm. 5.3 volumetric flask. 100mL. Step 6 Analysis 6.1 Draw a calibration curve Pipette respectively 0.50mL, 1.00mL, 2.00mL, 3.00mL, 4.00mL benzene Benzotriazole standard solution in five 100mL flask Diluted with water to the mark. The series solution of benzene Benzotriazole contents were 0.5mg/L, 1.0mg/L, 2.0mg/L, 3.0mg/L, 4.0mg/L. Using a spectrophotometer with a 1cm quartz absorption cell in the 268nm wavelength, with water as a reference measuring absorbance degree. Benzotriazole benzene content (mg/L) as the abscissa, the corresponding absorbance for the vertical axis, a calibration curve. ......

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