Standard Briefing:Stadard ID: SN/T 0837.3-2011
Stadard Title: Method for chemical analysis of arsenic trioside for import and export. Part 3: Determination of iron content
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 0837.3-2011 | English | 159 |
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Method for chemical analysis of arsenic trioside for import and export. Part 3: Determination of iron content
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SN/T 0837.3-2011
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| SN/T 0837.3-1999 | English | 279 |
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Method for the determination of iron in arsenic trioxide for export
| Obsolete |
SN/T 0837.3-1999
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Basic Data: | Standard ID | SN/T 0837.3-2011 (SN/T0837.3-2011) | | Description (Translated English) | Method for chemical analysis of arsenic trioside for import and export. Part 3: Determination of iron content | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | G10 | | Word Count Estimation | 6,664 | | Date of Issue | 2011-02-25 | | Date of Implementation | 2011-07-01 | | Older Standard (superseded by this standard) | SN/T 0837.3-1999 | | Quoted Standard | GB/T 21187-2007; JB/T 9324-1999 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China | | Summary | This standard specifies the out-Determination of iron content of arsenic trioxide method. This section applies to the determination of arsenic trioxide in the import and export of iron content. Measuring range: 0. 002% to 1. 0% (mass fraction). | Contents, Scope, and Excerpt:SN/T 0837.3-2011
Method for chemical analysis of arsenic trioside for import and export.Part 3. Determination of iron content
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Instead of the SN/T 0837.3-1999
Import and export of chemical analysis of arsenic trioxide
Part 3. Determination of iron content
Part 3. Determinationofironcontent
Issued on. 2011-02-25
2011-07-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
ForewordSN/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 30837 of.
The partial replacement of SN/T 0837.3-1999 "Determination of arsenic trioxide in the export of iron." This portion of the SN/T 0837.3-
Compared to 1999, the main changes are as follows.
--- The lower limit of the measurement range from 0.001% to 0.002% or modification;
--- In Chapter 6, "sample", the increased size of the requirements by deleting the content on sample preparation and preservation. Notes to modify the warning
After the first on this Part;
--- In Chapter 3, "Methods and Principles", the low-temperature low-temperature burning arsenic removal to removal of arsenic dissolved in hydrochloric acid;
--- Flame atomic absorption spectrometry and O - phenanthroline UV spectrophotometry same parts blend together;
--- In Chapter 4, "agent", the hydrochloric acid (21) instead of hydrochloric acid (11), of iron standard solution (1mg/mL) to switch to a commercial standard solution;
--- In Chapter 7, "analysis step", the increase of the parallel determination requirements. In addition to the direct low-temperature burning arsenic dissolved in hydrochloric acid to lower
Temperature arsenic removal. The residue was dissolved to adjust the amount of acid, so that a consistent sample and standard solution acidity;
--- Will allow differential expression changed to regulate the expression of precision;
--- Delete the original contents of Appendix A "atomic absorption spectrophotometer performance indicators", performance metrics defined in Chapter 5.
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, Luo Yumei, Guo Seoul, Chung Pei Yu, Zhao Quan, Zhangzhen Kun, Chen Wenjie.
This part of the alternative criteria previously issued as follows.
--- ZBG10001-1986 Chapter 4. Determination of iron;
--- SN/T 0837.3-1999.
Import and export of chemical analysis of arsenic trioxide
Part 3. Determination of iron content
Warning. Arsenic trioxide is highly toxic chemicals, the use of this standard shall have a person experiences regular laboratory work. This standard
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.
ScopeThis section provides a method for the import and export of iron content determination of arsenic trioxide.
This section applies to the determination of arsenic trioxide and export of iron content. Measurement range. 0.002% to 1.0% (mass fraction).
Normative ReferencesThe following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 21187-2007 atomic absorption spectrophotometer
JB/T 9324-1999 Vis
3 PRINCIPLE OF THE METHOD
Sample was dissolved with hydrochloric acid, low temperature to remove arsenic chloride evaporated, the residue was dissolved with hydrochloric acid. By flame atomic absorption spectrometry or Phenanthroline spectrophotometric
Spectrophotometric determination of iron content. Flame Atomic Absorption Spectrometry. air - acetylene flame at a wavelength at 248.3nm measured absorbance; phenanthroline
Luo spectrophotometry method. with ascorbic acid ferric reduced to ferrous iron, an appropriate amount of ammonium acetate in the presence of divalent iron to generate Phenanthroline
Orange-red complex, at the wavelength of 510nm measured absorbance.
4 Reagents
Unless otherwise specified, use only analytical grade reagents and distilled or deionized water or equivalent purity.
4.1 hydrochloride (ρ1.19g/mL).
4.2 hydrochloride (11).
4.3 hydrochloride (298).
4.4 iron standard stock solution (1000μg/mL).
4.5 iron standard solution (100μg/mL). Pipette 10.00mL iron standard stock solution (4.4) in 100mL flask, add 4mL salt
Acid (4.2), diluted with water to the mark.
4.6 iron standard solution (10.0μg/mL). Pipette 1.00mL iron standard stock solution (4.4) in 100mL flask, add 4mL salt
Acid (4.2), diluted with water to the mark.
4.7 ammonium acetate solution (400g/L).
4.8 ascorbic acid solution (10g/L), the time is now equipped with.
4.9 Phenanthroline solution (1g/L). dissolve 0.1g Phenanthroline in 100mL of water, stored in a colored bottle, if there is color, should be re
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