SN/T 0837.3-2011 English PDF

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SN/T 0837.3-2011: Method for chemical analysis of arsenic trioside for import and export. Part 3: Determination of iron content
Status: Valid

SN/T 0837.3: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 0837.3-2011	159	Add to Cart	3 days	Method for chemical analysis of arsenic trioside for import and export. Part 3: Determination of iron content	Valid
SN/T 0837.3-1999	279	Add to Cart	3 days	Method for the determination of iron in arsenic trioxide for export	Obsolete

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GB/T 3049   GB/T 3051   GB/T 3050   SN/T 3732   SN/T 0837.2   SN/T 0837.1   

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: 6,654
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Older Standard (superseded by this standard): SN/T 0837.3-1999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
Regulation (derived from): ?AQSIQ-Inspection [2011] 90
Issuing agency(ies): General Administration of Customs
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).

SN/T 0837.3-2011: Method for chemical analysis of arsenic trioside for import and export. Part 3: Determination of iron 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.
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

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 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.

1 Scope

This 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).

2 Normative references

The 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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