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GB/T 12149-2017: Determination of silica in water for industrial circulating cooling system and boiler
Status: Valid GB/T 12149: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 12149-2017 | English | 199 |
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Determination of silica in water for industrial circulating cooling system and boiler
| Valid |
GB/T 12149-2017
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| GB/T 12149-2007 | English | 359 |
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Water for industrial circulating cooling system and boiler -- Determination of silica
| Obsolete |
GB/T 12149-2007
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| GB/T 12149-1989 | English | 199 |
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Analysis of water used in boiler and cooling system--Determination of silica--Molybdenum blue colorimetry
| Obsolete |
GB/T 12149-1989
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PDF similar to GB/T 12149-2017
Basic data | Standard ID | GB/T 12149-2017 (GB/T12149-2017) | | Description (Translated English) | Determination of silica in water for industrial circulating cooling system and boiler | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G76 | | Classification of International Standard | 13.060.50; 71.040.40 | | Word Count Estimation | 10,127 | | Date of Issue | 2017-09-07 | | Date of Implementation | 2018-04-01 | | Older Standard (superseded by this standard) | GB/T 12149-2007 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic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 | GB/T 12149-2017: Determination of silica in water for industrial circulating cooling system and boiler
---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.
Determination of silica in water for industrial circulating cooling system and boiler
ICS 13.060.50; 71.040.40
G76
National Standards of People's Republic of China
Replacing GB/T 12149-2007
Industrial circulating cooling water and boilers
Determination of silicon in water
2017-09-07 Posted
2018-04-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 12149-2007 "Determination of industrial circulating cooling water and boiler water silicon, and GB/T 12149-2007
Compared with the main technical changes are as follows.
--- Remove the silicate analyzer method (see.2007 edition Chapter 4);
--- Increasing the determination of trace silicon spectrophotometry (see 4.3);
--- Increasing the determination of trace silicon all hydrofluoric acid conversion spectrophotometry (see 6.3);
--- Added test report (see Chapter 7).
This standard proposed by the China Petroleum and Chemical Industry Federation.
This standard by the National Standardization Technical Committee water treatment chemicals Technical Committee (SAC/TC63/SC5) centralized.
This standard is drafted by. Zhejiang Shuizhen Testing Co., Ltd., Henan Qingshuiyuan Technology Co., Ltd., Guangzhou special pressure set
Equipment Testing and Research Institute, Ningbo Special Equipment Inspection and Research Institute, Jiangsu Province Special Equipment Safety Supervision and Inspection Institute of Changzhou Branch, CNOOC
Tianjin Chemical Research and Design Institute Co., Ltd., Xiamen High-Poole Automation Equipment Co., Ltd., Nanjing University Yixing Environmental Protection Research Institute, Tianjin is up to
Technology limited liability company.
The main drafters of this standard. Chen Shuang, Liu Yi, Li Hua, Chen Dingyue, Wu Xunzhen, Bai Ying, Li Fang Gong, Chen Jiabin, Ren Hongqiang, Shao Hongqian.
This standard replaces the standard version released as.
--- GB/T 12149-1989, GB/T 12149-2007;
--- GB/T 12150-1989;
--- GB/T 14417-1993;
--- GB/T 16633-1996.
Industrial circulating cooling water and boilers
Determination of silicon in water
1 Scope
This standard specifies the method of determination of industrial circulating cooling water, silicon content in boiler water.
This standard applies to industrial circulating cooling water, boiler water determination of silicon content. This standard also applies to the determination of silicon in natural water
set. The determination of the standard silicon in this standard spectrophotometry for industrial circulating cooling water, boiler water and natural water soluble silicon content of
0.1mg/L ~ 5mg/L determination; spectrophotometric determination of trace silicon for chemical desalinated water, power station boiler feed water, steam, condensate
Water and other boilers in the silicon content of 10μg/L ~.200μg/L determination; gravimetric method for industrial circulating cooling water and natural water silicon
Determination of the content of more than 5mg/L; Determination of hydrofluoric acid conversion spectrophotometry for the determination of silicon in raw water, furnace water silicon content of
1mg/L ~ 5mg/L determination; hydrofluoric acid conversion spectrophotometric determination of trace silicon for demineralized water, water, water and steam condensate
Total silicon content of less than 100μg/L determination.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 602 chemical reagent impurity standard solution preparation
GB/T 6682 analytical laboratory water specifications and test methods
3 rules
Caution --- The strong acids used in this standard are corrosive, and should be avoided when inhaled or in contact with the skin. Splashed body immediately with large
Flush with water, serious illness should seek medical treatment immediately.
Reagents and water used in this standard, unless otherwise specified, only the use of analytical reagents and in line with the provisions of GB/T 6682 secondary water.
The required standard solution of impurities in the test, did not indicate when the other requirements, according to the provisions of GB/T 602 prepared.
4 spectrophotometry
4.1 principle
At (27 ± 5) ° C, silicate reacts with molybdate to form molybdate yellow (heteropoly-silicate). Silicon molybdenum yellow was 1-amino-2-naphthol-4-sulfonic acid
Reduction into silicon molybdenum blue, measured by spectrophotometry.
4.2 Determination of silicon content
4.2.1 Reagents or materials
4.2.1.1 hydrochloric acid solution .1 1.
4.2.1.2 oxalic acid solution (H2C2O4 · 2H2O) .100g/L.
4.2.1.3 Ammonium molybdate [(NH4) 6Mo7O24 4H2O] solution 75 g/L.
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