Search result: SN/T 0837.2-2011 (SN/T 0837.2-1999 Older version)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 0837.2-2011 | English | 139 |
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Method for chemical analysis of arsenic trioxide for import and export. Part 2: Determination of moisture
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SN/T 0837.2-2011
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| SN/T 0837.2-1999 | English | 199 |
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Method for the determination of moisture in arsenic trioxide for export
| Obsolete |
SN/T 0837.2-1999
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| Standard ID | SN/T 0837.2-2011 (SN/T0837.2-2011) | | Description (Translated English) | Method for chemical analysis of arsenic trioxide for import and export. Part 2: Determination of moisture | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | G10 | | Word Count Estimation | 5,525 | | Date of Issue | 2011-02-25 | | Date of Implementation | 2011-07-01 | | Older Standard (superseded by this standard) | SN/T 0837.2-1999 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China | | Summary | This standard specifies the determination of the import and export of arsenic trioxide in water. This section applies to the determination of the import and export of arsenic trioxide in water. Measuring range: <2% (mass fraction). |
SN/T 0837.2-2011
Method for chemical analysis of arsenic trioxide for import and export Part 2. Determination of moisture
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Instead of the SN/T 0837.2-1999
Import and export of chemical analysis of arsenic trioxide
Part 2. Determination of moisture content
Part 2. Determinationofmoisture
Issued on. 2011-02-25
2011-07-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
SN/T 0837 "Importers and chemical analysis of arsenic trioxide" series of standards is divided into four parts.
Determination of Arsenic trioxide content. --- Part 1
--- Part 2. Determination of moisture content
--- Part 3. Determination of iron content
--- Part 4. Determination of chlorine ion content
This section SN/T Section 20837 of.
The partial replacement of SN/T 0837.2-1999 "Determination of arsenic trioxide in the export of water."
This section compared with the SN/T 0837.2-1999, the main changes are as follows.
--- Rewritten Chapter 3;
--- In Chapter 4, "Sample Preparation", by deleting the content stored on the sample. Note the warnings on the first modified this Part;
--- Corrected allowable difference errors will allow poor representation modified to express precision specification.
This section proposed and managed by the National Certification and Accreditation Administration Committee.
This section was drafted by. People's Republic of China Guangdong CIQ.
Drafters of this section. Lu Zhenguo, He Yingxian, Yu Pei Zhong, Zhong Zhiguang, Zhangzhen Kun, Zhao Quan, Chen Wenjie.
This part of the alternative criteria previously issued as follows.
--- ZBG10001-1986 Chapter 3. Determination of moisture;
--- SN/T 0837.2-1999.
Import and export of chemical analysis of arsenic trioxide
Part 2. Determination of moisture content
Warning. Arsenic trioxide is highly toxic chemicals, the use of this part of the regular staff should have practical experience of laboratory work. This section and
It does not indicate a possible security problem. The user's responsibility to take appropriate safety and health practices and to ensure compliance with relevant national regulations
condition.
1 Scope
This section provides the determination of arsenic trioxide in the import and export of water.
This section applies to the determination of moisture in the import and export of arsenic trioxide. Measurement range. < 2% (mass fraction).
2 principle of the method
Sample in sulfuric acid desiccator, after drying to constant weight concentrated sulfuric acid, calculated according to the amount of water loss in mass.
3 Instrument
3.1 Analysis of balance. a sense of the amount of 0.1mg.
3.2 sulfuric acid dryer. Glass drier, plus about 500mL of concentrated sulfuric acid (ρ1.84g/mL) as a desiccant.
3.3 glass weighing bottle. diameter of about 6cm, height of about 3cm.
4 Sample Preparation
The sample was mixed simple, fast sealing plastic bag for moisture measurement.
Step 5 Analysis
5.1 Sample
Weigh sample 10g ~ 15g, accurate to 0.1mg. Independently carry out two measurements, the results of the arithmetic mean.
5.2 Determination
The sample was placed in the dryer after sulfuric acid constant weight weighing bottle glass, semi-open lid, placed sulfate drier than 16h, cover
Cover, remove and weigh. Repeat dried to constant weight.
Poor quality does not exceed 1mg twice before and after is a constant weight.
6 calculated results
Moisture mass fraction expressed by the formula (1).
w =
(M1 m-m2)
m × 100
(1)
......
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