GB/T 16632-2019_English: PDF (GB/T16632-2019)
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Determination of scale inhibition performance of water treatment chemicals -- Calcium carbonate precipitation method
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GB/T 16632-2019
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| GB/T 16632-2008 | English | 90 |
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Determination of scale inhibition performance of water treatment agents -- Calcium carbonate precipitation method
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GB/T 16632-2008
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| GB/T 16632-1996 | English | 239 |
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The determination of scale inhibition performance of water treatment agents--Calcium carbonate precipitation method
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GB/T 16632-1996
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| Standard ID | GB/T 16632-2019 (GB/T16632-2019) | | Description (Translated English) | Determination of scale inhibition performance of water treatment chemicals -- Calcium carbonate precipitation method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G76 | | Classification of International Standard | 71.040.40 | | Word Count Estimation | 6,630 | | Date of Issue | 2019-08-30 | | Date of Implementation | 2020-07-01 | | Drafting Organization | Henan Qingshuiyuan Technology Co., Ltd., Guangzhou Special Pressure Equipment Testing and Research Institute, Hangzhou Special Equipment Testing Research Institute, Nanjing Yushui Technology Co., Ltd., Shenzhen Zhunuo Testing Co., Ltd., Shandong Taihe Water Treatment Technology Co., Ltd., Jiangsu Province Special Equipment Safety Supervision and Inspection Institute Suzhou Branch, CNOOC Tianjin Chemical Research and Design Institute Co., Ltd., Jiashan Lvye Environmental Protection Material Factory, Hangzhou Mingzhu Water Treatment Technology Co., Ltd., Tianjin Zhengda Technology Co., Ltd. | | Administrative Organization | National Chemical Standardization Technical Committee (SAC/TC 63) | | Proposing organization | China Petroleum and Chemical Industry Federation | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | | Standard ID | GB/T 16632-2008 (GB/T16632-2008) | | Description (Translated English) | Determination of scale inhibition performance of water treatment agents - Calcium carbonate precipitation method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G76 | | Classification of International Standard | 71.040.40 | | Word Count Estimation | 8,837 | | Date of Issue | 2008-04-01 | | Date of Implementation | 2008-09-01 | | Older Standard (superseded by this standard) | GB/T 16632-1996 | | Quoted Standard | GB/T 601; GB/T 603; GB/T 6682 | | Drafting Organization | Jiyuan Qingyuan Industrial Co., Ltd. | | Administrative Organization | Chemical treatment agent branch nationwide Standardization Technical Committee | | Regulation (derived from) | National Standard Approval Announcement 2008 No.5 (Total No.118) | | Proposing organization | China Petroleum and Chemical Industry Association | | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | | Summary | This standard specifies the method for the determination of similar treatment inhibits the precipitation of calcium carbon- scale performance. Namely calcium carbonate deposition. This standard applies to similar treatment inhibits precipitation of carbonate scale performance assessment. | | Standard ID | GB/T 16632-1996 (GB/T16632-1996) | | Description (Translated English) | The determination of scale inhibition performance of water treatment agents--Calcium carbonate precipitation method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G76 | | Classification of International Standard | 71.100.80 | | Word Count Estimation | 6,623 | | Date of Issue | 1996/12/2 | | Date of Implementation | 1997/5/1 | | Quoted Standard | GB/T 601-1988; GB/T 603-1988; GB/T 6682-1992, | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 5, 2008 (No. 118 overall) | | Proposing organization | Ministry of Chemical Industry of the People Republic of China | | Issuing agency(ies) | State Bureau of Technical Supervision |
GB/T 16632-2019
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.040.40
G 76
Replacing GB/T 16632-2008
Determination of scale inhibition performance of water
treatment chemicals - Calcium carbonate precipitation
method
ISSUED ON: AUGUST 30, 2019
IMPLEMENTED ON: JULY 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Method summary ... 4
4 Reagents or materials ... 5
5 Instruments and apparatuses ... 7
6 Test water ... 7
7 Preparation of sample solution ... 7
8 Test procedure ... 8
9 Result calculation ... 8
10 Allowable difference ... 8
Determination of scale inhibition performance of water
treatment chemicals - Calcium carbonate precipitation
method
1 Scope
This Standard specifies the determination of scale inhibition performance of
water treatment chemicals to inhibit calcium carbonate precipitation -- calcium
carbonate precipitation method.
This Standard applies to the evaluation of the scale inhibition performance of
water treatment chemicals to inhibit calcium carbonate precipitation under the
same conditions in the circulating cooling water system; it also applies to the
screening of the water treatment chemicals to inhibit calcium carbonate scale
formulation.
2 Normative references
The following documents are indispensable for the application of this document.
For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies to this
document.
GB/T 601, Chemical reagent - Preparations of reference titration solutions
GB/T 603, Chemical reagent - Preparations of reagent solutions for use in
test methods
GB/T 6682, Water for analytical laboratory use - Specification and test
methods
3 Method summary
Use water for actual working conditions, or prepared water that contains a
certain amount of bicarbonate radical and calcium ions AND water treatment
chemicals to prepare into the test solution. Under heating conditions, promote
the accelerated decomposition of calcium bicarbonate into calcium carbonate.
After reaching the equilibrium, determine the calcium ion concentration in the
test solution. The larger the calcium ion concentration, the better the scale
inhibition performance of the water treatment chemicals.
V -- the value of the volume of the taken sodium bicarbonate standard solution,
in milliliters (mL) (V = 5).
4.5 Calcium chloride standard solution: 1 mL contains about 6.0 mg of Ca2+;
prepare and calibrate according to the following steps:
a) Preparation: weigh 16.7 g of anhydrous calcium chloride into a 100 mL
beaker; use water to dissolve it; transfer all to a 1 000 mL volumetric flask;
use water to dilute to the mark; shake well.
b) Calibration: pipette 2.00 mL of calcium chloride standard solution into a
250 mL conical flask; add about 80 mL of water, 5 mL of potassium
hydroxide solution and about 0.1 g of calcium-carboxylic acid indicator;
use Ethylene Diamine Tetraacetic Acid standard titration solution to titrate
until the solution turns from purple-red to bright blue as the end point.
c) Calculation: calculate the content of calcium ion (Ca2+) by mass
concentration ρ2, according to Formula (2):
Where:
ρ2 -- the mass concentration of calcium ion (Ca2+), in milligrams per milliliter
(mg/mL);
V1 -- the value of the volume of Ethylene Diamine Tetraacetic Acid standard
titration solution that is consumed in the titration, in milliliters (mL);
c -- the exact value of the actual concentration of Ethylene Diamine Tetraacetic
Acid standard titration solution, in moles per liter (mol/L);
M -- the value of the molar mass of calcium ion (Ca2+), in grams per mole (g/mol)
(M = 40.08);
V -- the value of the volume of the taken calcium chloride standard solution, in
milliliters (mL) (V = 2).
4.6 Hydrochloric acid standard titration solution: c(HCl) is about 0.1 mol/L.
4.7 Ethylene Diamine Tetraacetic Acid standard titration solution: c (EDTA) is
about 0.01 mol/L.
4.8 Bromocresol green-methyl red indicator solution
4.9 Calcium-carboxylic acid indicator: weigh 0.2 g of calcium-carboxylic acid
indicator [2-hydroxy-1(2-hydroxy-4-sulfo-1-naphthalenazo)-3-naphthoic acid]
......
GB 16632-2008
GB
ICS 71.040.40
G 76
National Standard
of the People’s Republic of China
Replacing GB 16632-1996
Determination of scale inhibition performance of
water treatment agents - Calcium carbonate
precipitation method
ISSUED ON. APRIL, 2008
IMPLEMENTED ON. SEPTEMBER 1, 2008
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Method Summary ... 4
4 Reagents & Materials ... 5
5 Instrument & Apparatus ... 7
6 Preparation of Sample Solution ... 7
7 Analysis Steps ... 7
8 Calculation of Analysis Results ... 8
9 Allowable Difference ... 8
Foreword
This Standard replaces GB/T 16632-1996 “Determination of scale inhibition
performance of water treatment agents - Calcium carbonate precipitation
method”.
Compared with GB/T 16632-1996, there is no technical difference.
This Standard was proposed by China Petroleum and Chemical Industry
Association.
This Standard shall be under the jurisdiction of Water Treatment Agent Branch
of National Chemistry Standardization Technical Committee (SAC/TC 63/SC 5).
The drafting organizations of this Standard. Qingyuan Jiyuan Industrial Co., Ltd.,
Tianjin Chemical Research & Design Institute, and Shandong Taihe Water
Treatment Co., Ltd.
Main drafters of this Standard. Wang Zhiqing, Zhu Chuanjun, Sun Baoji, Li Lin,
and Bai Ying.
This Standard was issued in 1996 for the first time.
Determination of scale inhibition performance of water
treatment agents - Calcium carbonate precipitation
method
1 Scope
This Standard specifies the determination method of scale inhibition
performance that similar water treatment agents inhibit the separation of
calcium carbonate, i.e., calcium carbonate precipitation method.
This Standard is applicable to the assessment of scale inhibition performance
that similar water treatment agents inhibit the separation of calcium carbonate.
2 Normative References
The following standards contain the provisions which, through reference in this
Standard, constitute the provisions of this Standard. For dated references,
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard. However, the parties who enter into agreement based on this
Standard are encouraged to investigate whether the latest versions of these
documents are applicable. For undated reference documents, the latest
versions apply to this Standard.
GB/T 601 Chemical Reagent - Preparations of Standard Volumetric
Solutions
GB/T 603 Chemical Reagent – Preparations of Reagent Solution for Use
in Test (GB/T 603-2002, ISO 6353-1.1982, NEQ)
GB/T 6682 Water for analytical laboratory use - Specification and test
methods (GB/T 6682-1992, neq ISO 3696.1987)
3 Method Summary
Use the prepared water that contains certain amount of calcium bicarbonate
and calcium ion AND water treatment agent to prepare the test solution. Under
heating conditions, it accelerates the calcium bicarbonate to decompose to
calcium carbonate. After equilibrium is reached, determine the calcium ion’s
per liter (mol/L);
V - the calcium chloride standard solution taken, in milliliter (mL);
M - the molar mass of calcium (Ca2+), in grams per mole (g/mol) (M=40.08).
4.9 Water treatment agent sample solution. 1.00 mL contains about 0.500 mg
of water treatment agent (calculated by dry basis).
5 Instrument & Apparatus
5.1 Thermostatic water bath. the temperature shall be controlled at (80±1)°C.
5.2 Conical flask. 500 mL, equipped with stopper of Φ5 mm~Φ10 mm, glass
tube of 300 mm long.
6 Preparation of Sample Solution
6.1 Preparation of test solution
Add 250 mL of water into 500 mL flask; use buret to add a certain volume of
standard solution of calcium chloride, so as to make the amount of calcium ions
to be 120 mg. Use suction pipette to add 5.0 mL of water treatment agent
sample solution; shake evenly. Then add 20 mL of borax buffer solution; shake
evenly. Use buret to slowly add a certain volume of standard solution of sodium
bicarbonate (shake while adding), so as to make the amount of bicarbonate
ions to be 366 mg; use water to dilute to scale; shake evenly.
6.2 Preparation of blank test solution
In another 500 mL flask, except that the sample solution is not added with water
treatment agent, follow Step 6.1 to operate.
7 Analysis Steps
Respectively place the test solution and the blank test solution in two clean
conical flasks; dip these two flasks into thermostatic water bath of (80±1) °C
(the test solution shall not exceed the level of the liquid in the water bath); place
in constant temperature for 10 h. After it is cooled to room temperature, use
medium speed quantitative filter paper to dry filter. Respectively pipette 25.00
mL of filtrate; place in 250 mL conical flasks; add water to 80 mL; add 5 mL of
potassium hydroxide solution and about 0.1 g of calcium - carboxylic acid
indicator. Use edetate disodium standard solution to titrate the solution till the
end point - it turns from purplish red to bright blue. Use equation (2) to
......
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