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GB/T 23842-2009: General method for the determination of silicon content of inorganic chemicals -- Reduced molybdosilicate spectrophotometric method
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 23842-2009 | English | 279 |
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General method for the determination of silicon content of inorganic chemicals -- Reduced molybdosilicate spectrophotometric method
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GB/T 23842-2009
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Basic data | Standard ID | GB/T 23842-2009 (GB/T23842-2009) | | Description (Translated English) | General method for the determination of silicon content of inorganic chemicals -- Reduced molybdosilicate spectrophotometric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G10 | | Classification of International Standard | 71.060.01 | | Word Count Estimation | 12,187 | | Date of Issue | 2009-05-18 | | Date of Implementation | 2010-02-01 | | Adopted Standard | ISO 6382-1981, MOD | | Regulation (derived from) | PRC National Standard Approval Announcement 2009 No.6 (Total No.146) | | 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 general method of inorganic chemical products Determination of silicon-silicon molybdenum salt reduction spectrophotometry. This standard applies to common inorganic chemical products measured in silicon content. Preparation of test solution is analyzed product should refer to the specific product standards being tested liquid SiO2 content ranges should interfere limit given in Appendix C in 2��g ~ 200��g. | GB/T 23842-2009: General method for the determination of silicon content of inorganic chemicals -- Reduced molybdosilicate spectrophotometric method
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General method for the determination of silicon content of inorganic chemicals. Reduced molybdosilicate spectrophotometric method
ICS 71.060.01
G10
National Standards of People's Republic of China
General method for determination of silicon content of inorganic chemical products
Restore silicon molybdate salt spectrophotometric method
(ISO 6382. 1981, MOD)
Posted 2009-05-18
2010-02-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This revised standard adopts ISO 6382. 1981 "General method for determination of silicon content --- reducing silicon molybdate spectrophotometry."
Taking into account the differences in the scope and application of the conditions in the use of ISO 6382. 1981, the present standards were amended as appropriate. For technical
Differences have been incorporated into the text. We give a list of these technical differences and the reasons in Appendix A and Appendix B of this standard is given in chapter
Article number with ISO 6382. 1981 corresponding controls.
The Standard Appendix A, Appendix B and Appendix C are informative appendices.
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standardization Technical Committee chemical inorganic chemicals Club (SAC/TC63/SC1) centralized.
This standard is mainly drafted by. Fluoride Chemicals Co., Ltd., CNOOC Tianjin Chemical Research & Design Institute.
The main drafters of this standard. Xu Jin Xue, FAN Guo-qiang, Li Yongqiang.
General method for determination of silicon content of inorganic chemical products
Restore silicon molybdate salt spectrophotometric method
1 Scope
This standard specifies the general method of inorganic chemical products, silicon content determination --- reducing silicon molybdate salt spectrophotometric method.
This standard applies to the general method of inorganic chemical products Determination of silicon content in. Preparation of the test solution should be analyzed with reference to specific product standard products
Accurate, to be tested in the SiO2 content of the liquid should be in the range of 2μg ~ 200μg, interference limits are given in Appendix C.
2 Normative reference standard
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 6682-2008 analytical laboratory use specifications and test methods (ISO 3696. 1987, MOD)
Preparation of HG/T 3696.2 inorganic chemical products, chemical analysis of impurity standard solution
Preparations of HG/T 3696.3 inorganic chemical products, chemical analysis
Principle 3
In the presence of hydrochloric acid, sodium fluoride-treated sample, so that any form of polysilicon depolymerization. Masking interfering with boric acid fluoride ion, at pH
Was 1.1 ± 0.2, the solution state silicon oxide is formed (yellow) silicon molybdate.
In the presence of oxalic acid, sulfuric acid medium in sufficient strength, the selective reduction of silicon molybdate complexes, to eliminate the interference of phosphate.
The maximum absorption wavelength (815nm) at spectrophotometrically measuring the absorbance of the blue complex.
4 Safety Tips
Reagents and materials used in this standard has a toxic and corrosive, the operation need to be careful! Avoid contact with skin and eyes.
Should immediately wash with water splashing such as the skin or eyes, severe cases should be treated immediately.
5 General Provisions
The criteria used in the analysis of analytical reagent-free silicon as possible, the water is third grade GB/T 6682-2008 specified in
Water distillation equipment by secondary quartz distilled water or equivalent purity water, demineralized water is not appropriate. All reagents should store in silicon-free material (such as
Polyethylene) bottles made. The reagents used are by analytical reagents used in the tests impurity standard solution, preparations and products, did not indicate in its
He requested, according to HG/T 3696.2, HG/T 3696.3 regulations prepared.
6 Reagents
Sulfuric acid solution was 6.1. 1 + 3.
Hydrochloric acid solution was 6.2. 1 + 2.
6.3 boric acid solution. a saturated solution at room temperature (about 48g/L).
6.4 oxalate dihydrate (H2C2O4 · 2H2O) solution. 100g/L.
6.5 NaF solution. 20g/L, the solution was stored in bottles made of non-silicon material.
6.6 Dibasic sodium molybdate dihydrate. 140g/L.
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