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GB/T 22427.12-2008: Starches and derived products -- Determination of chloride content
Status: Obsolete
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| GB/T 22427.12-2008 | English | 199 |
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Starches and derived products -- Determination of chloride content
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GB/T 22427.12-2008
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Basic data | Standard ID | GB/T 22427.12-2008 (GB/T22427.12-2008) | | Description (Translated English) | Starches and derived products -- Determination of chloride content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | X11 | | Classification of International Standard | 67.180.20 | | Word Count Estimation | 5,522 | | Date of Issue | 2008-10-19 | | Date of Implementation | 2009-03-01 | | Older Standard (superseded by this standard) | GB/T 12093-1989 | | Adopted Standard | ISO 5810-1982, IDT | | Regulation (derived from) | National Standard Approval Announcement 2008 No.17 (Total No.130) | | 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 of potentiometric titration of chloride content of starch and its derivatives. This standard applies to the determination of chloride content of starch and its derivatives. But not for the higher viscosity of cationic starch and cooling of starch and its derivatives. | GB/T 22427.12-2008: Starches and derived products -- Determination of chloride 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.
Starches and derived products. Determination of chloride content
ICS 67.180.20
X11
National Standards of People's Republic of China
GB/T 22427.12-2008/ISO 5810. 1982
Replacing GB/T 12093-1989
Determination of chloride content of starch and its derivatives
(ISO 5810. 1982, Starchesandderivedproducts-Determinaitonof
chloridecontent-Potentiometricmethod, IDT)
Posted 2008-10-19
2009-03-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard is identical with ISO 5810. 1982 "chloride content of starch and its derivatives potentiometric titration" (in English), because of the
Older version, to meet current needs, slightly adjusted structure, contents remain the same, only made editorial changes.
This standard replaces GB/T 12093-1989 "starch and derivatives chloride content determination."
This standard and GB/T 12093-1989 compared to major changes are as follows.
--- Standard name changed to "determination of chloride content of starch and its derivatives";
--- Improve the standard format, according to the International System of Units standardized units.
This standard is proposed and managed by China General Chamber of Commerce.
This standard was drafted. Chinese Chamber of Commerce Business Standard centers, food, Jiangnan University, China Starch Industry Association modified starch
professional committee.
The main drafters of this standard. Guzheng Biao, Hong Yan, Cheng Li, Chen Hongxing, Liu Zhimin, Jin Xiaolei.
GB/T 22427.12-2008/ISO 5810. 1982
Determination of chloride content of starch and its derivatives
1 Scope
This standard specifies the method of potentiometric titration of chloride content of starch and its derivatives.
This standard applies to the determination of chloride content of starch and its derivatives, but not for cationic starch and high viscosity after cooling
Starch and its derivatives.
Principle 2
With a standard silver nitrate solution as a reference, it was determined by potentiometric titration.
3 Reagents
Use analytical grade reagents and distilled water or equivalent purity.
3.1 nitrate. Ba = 70% (mass fraction), ρ20 = 1.41g/mL.
3.2 silver nitrate standard solution. Ba = 0.05mol/L or 0.02mol/L.
4 Instrument
4.1 Beaker. 250mL.
4.2 Pipette. 1mL.
4.3 Burette. 10mL.
4.4 Analysis of balance. a sense of the amount of 0.0001g.
4.5 potentiometer or pH meter. Scale should millivolts indexing, and corrected in accordance with instructions for use.
4.6 Electrode
4.6.1 silver - silver chloride electrode.
4.6.2 reference electrode for measuring the potentiometer chloride electrode system.
4.7 variable speed magnetic stirrer.
5 Operation
5.1 Sample preparation
Mix well samples.
5.2 said sample
According to Table 1, the estimated chloride content Weigh samples of adequate quality, accurate to 0.001g.
Table 1
Chloride content estimates
(Mass fraction, as NaCl) /%
Sample size/g
< 25 0.05
0.05 to 0.2 15
0.2 ~ 0.5 5
1 2.5 0.5
1-5 0.5
GB/T 22427.12-2008/ISO 5810. 1982
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