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GB/T 13025.3-2012: General test method in salt industry -- Determination of moisture
Status: Valid GB/T 13025.3: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 13025.3-2012 | English | 149 |
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General test method in salt industry -- Determination of moisture
| Valid |
GB/T 13025.3-2012
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| GB/T 13025.3-1991 | English | 199 |
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General test method in salt industry--Determination of moisture
| Obsolete |
GB/T 13025.3-1991
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Basic data | Standard ID | GB/T 13025.3-2012 (GB/T13025.3-2012) | | Description (Translated English) | General test method in salt industry -- Determination of moisture | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | X35 | | Classification of International Standard | 71.060.50 | | Word Count Estimation | 5,586 | | Older Standard (superseded by this standard) | GB/T 13025.3-1991 | | Regulation (derived from) | National Standards Bulletin No. 13 of 2012 | | Issuing agency(ies) | General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 salt and salt chemical products products Determination of moisture. This section applies to salt and salt chemical products products for determination of moisture, which applies only to loss on drying method moisture content of | GB/T 13025.3-2012: General test method in salt industry -- Determination of moisture---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.
ICS71.060.50
X35
National Standards of People's Republic of China
Replacing GB/T 13025.3-1991
General test method in salt industry - Determination of moisture
Issued on. 2012-06-29 2012-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This section of the standard method of series universal testing in salt industry, which is currently divided into the following series of standards section 13 and, if necessary, other test
Standard test method will complement the development of the follow-up work.
--- GB/T 13025.1 General test method in salt industry - Determination of particle size;
--- GB/T 13025.2 General test method in salt industry - Determination of whiteness;
--- GB/T 13025.3 General test method in salt industry - Determination of moisture content;
--- GB/T 13025.4 General test method in salt industry - Determination of insoluble matter;
--- GB/T 13025.5 General test method in salt industry Determination of chloride ion;
--- GB/T 13025.6 General test method in salt industry - Determination of calcium and magnesium;
--- GB/T 13025.7 General test method in salt industry - Determination of iodine;
--- GB/T 13025.8 General test method in salt industry - Determination of sulfate;
--- GB/T 13025.9 General test method in salt industry - Determination of lead;
--- GB/T 13025.10 General test method in salt industry - Determination of ferrous cyanide;
--- GB/T 13025.11 General test method in salt industry - Determination of Fluoride;
--- GB/T 13025.12 General test method in salt industry - Determination of barium;
--- GB/T 13025.13 General test method in salt industry - Determination of arsenic.
This is Part 3 GB/T 13025 in.
This section based on GB/T 1.1-2009 of rules for the preparation.
This Part replaces GB/T 13025.3-1991 "General test method in salt industry - Determination of moisture," This part of the editorial
modify.
This section presented by the China Light Industry Federation, the National Salt Industry Standardization Technical Committee centralized.
This section drafted by. National Maritime Center Salt Lake standardization.
The main drafters of this section. Tong Yun Kun, Huo Jun Fei.
This section previously issued as follows.
--- GB/T 13025.3-1991.
General test method in salt industry - Determination of moisture
1 Scope
This section GB/T 13025 product provides for determination of salt and salt chemical products in the water.
This section applies to the determination of salt and salt chemical products, product moisture wherein the loss on drying method applies only to a moisture content of not more than 4%
Determination of the sample.
2 Loss on drying method
2.1 Principle
Sample at a predetermined temperature (a temperature between 80 ℃ ~ 200 ℃) is dried to constant weight, weighing reductions before and after drying.
2.2 Instrument
2.2.1 Ovens. Temperature fluctuation ≤ ± 2 ℃.
2.2.2 low profile weighing bottle. 60mm × 30mm.
2.3 Analysis Steps
Weigh 10g crushed to 2mm or less homogeneous samples, weighing accuracy 0.001g, has been placed at a predetermined temperature dried and weighed low
Type weighing bottle, oblique open weighing bottle into the oven temperature gradually warmed to a predetermined temperature, continue drying 2h, covered weighing bottle, take
Out and transferred to a dryer, cooled to room temperature and weighed after each drying 1h weighing until two successive weighing the difference does not exceed 0.0005g
Regarded as a constant weight.
2.4 Calculation Results
The moisture content of the sample mass fraction w and its value as a percentage (%) expressed by the formula (1).
w = m1-m2m × 100%
(1)
Where.
m1 --- weighing bottle plus sample before drying mass in grams (g);
m2 after drying --- weighing bottle plus sample mass, in grams (g);
m --- weighed sample mass, in grams (g).
2.5 Precision
In the same laboratory by the same operator using the same equipment, the same testing methods, and in a short time on the same object to be measured phase
Two independent mutually independent test results obtained absolute difference is not greater than specified in Table 1.
Table 1
The absolute difference between the moisture content /% result /%
< 1.00 0.10
1.00 to 4.00 0.20
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