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YS/T 254.7-2011: Methods for chemical analysis of beryllium concentrate and beryl. Part 7: Determination of water content. Gravimetric method
Status: Valid YS/T 254.7: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| YS/T 254.7-2011 | English | 159 |
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Methods for chemical analysis of beryllium concentrate and beryl. Part 7: Determination of water content. Gravimetric method
| Valid |
YS/T 254.7-2011
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| YS/T 254.7-1994 | English | 199 |
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Methods for chemical analysis of beryllium concentrates-beryl The gravimetric method for the determination of water content
| Obsolete |
YS/T 254.7-1994
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PDF similar to YS/T 254.7-2011
Basic data | Standard ID | YS/T 254.7-2011 (YS/T254.7-2011) | | Description (Translated English) | Methods for chemical analysis of beryllium concentrate and beryl. Part 7: Determination of water content. Gravimetric method | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | D43 | | Classification of International Standard | 73.060 | | Word Count Estimation | 6,695 | | Date of Issue | 2011-12-20 | | Date of Implementation | 2012-07-01 | | Older Standard (superseded by this standard) | YS/T 254.7-1994 | | Regulation (derived from) | ?MIIT Announcement 2011 No.43 | | Issuing agency(ies) | Ministry of Industry and Information Technology | | Summary | This standard specifies the beryllium ore, determination of the amount of moisture in beryl. This standard applies to beryllium ore, determination of the amount of moisture in beryl. Measuring range: 0. 10% to 20. 0%. | YS/T 254.7-2011: Methods for chemical analysis of beryllium concentrate and beryl. Part 7: Determination of water content. Gravimetric method
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Methods for chemical analysis of beryllium concentrate and beryl.Part 7. Determination of water content.Gravimetric method
ICS 73.060
D43
People's Republic of China Nonferrous Metals Industry Standard
Replacing YS/T 254.7-1994
Beryllium ore, beryl chemical analysis
Part 7. Determination of moisture content - Gravimetric method
Part 7. Determinationofwatercontent-
Issued on. 2011-12-20
2012-07-01 implementation
Ministry of Industry and Information Technology of the People's Republic of China released
Foreword
YS/T 254 "of beryllium ore, beryl chemical analysis method" is divided into seven parts.
--- Part 1. Determination of the amount of beryllium oxide phosphate gravimetric method;
--- Part 2. iron oxide contents - EDTA titration sulfosalicylic acid spectrophotometric method;
--- Part 3. Determination of phosphorus content Molybdovanadophosphoric acid spectrophotometry;
--- Part 4. Determination of the amount of lithium oxide flame atomic absorption spectrometry;
--- Part 5. Determination of the amount of fluorine ion selective electrode method;
--- Part 6. Determination of calcium oxide content by flame atomic absorption spectrometry;
--- Part 7. moisture content - Gravimetric method.
This section YS/T 254 Part 7.
The partial replacement of YS/T 254.7-1994 "beryllium concentrates - beryl gravimetric method for chemical analysis of water content determination" (formerly
GB/T 5870.6-1986).
Section compared with YS/T 254.7-1994 The main changes are as follows.
--- Increased repeatability terms;
--- Text format has been re-edited, an increase of quality assurance and control provisions.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
This section is drafted. Shuikoushan Hunan Nonferrous Metals Group Co., Ltd., Xinjiang Institute of non-ferrous metals, Xinjiang Alashankou Importers
Inspection and Quarantine Bureau.
The main drafters of this section. Li Qingchun, Xie Yi Bin Guan Yuzhen, Wang Hongchuan, had He Hua.
This part of the standard replaces the previous editions are.
--- GB/T 5870.7-1986, YS/T 254.7-1994.
Beryllium ore, beryl chemical analysis
Part 7. Determination of moisture content - Gravimetric method
1 Scope
This section YS/T 254 provisions of the beryllium ore, beryl determination of moisture content.
This section applies to beryllium ore, beryl measured moisture content was measured in the range of 0.10% to 20.0%.
2 Method summary
In mineral water and rocks exist in two forms, namely, the adsorption of water and combined water. The method for determining the moisture adsorption. This kind
Water lost at 105 ℃ ~ 110 ℃ drying. Quality can be obtained according to the amount of change in the sample adsorb water.
3 Instrument
Ovens.
4 Sample
The specimen shall 2.00mm sieve through the aperture.
Step 5 Analysis
5.1 Sample
Weigh 20.00g samples, accurate to 0.0001g.
5.2 Determination of the number of
Independent secondary measurement averaged.
5.3 Determination
A sample (5.2) into a constant diameter 7cm weight of weighing bottle grinding mouth, opened the lid, at 105 ℃ ~ 110 ℃ drying 2h, removed,
Close the lid and placed in a desiccator to cool to room temperature and weighed. Repeat each baking 1h, referred to constant weight.
6 Calculation of analytical results
The moisture content in mass fraction of moisture wH2O and its value is expressed in% according to equation (1).
wH2O =
m1-m2
m0 ×
100 (1)
Where.
Mass m1 --- sample before drying and weighing bottles in grams (g);
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