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GB/T 32677-2016: Determination of inorganic sulfite in toothpaste
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 32677-2016 | English | 159 |
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Determination of inorganic sulfite in toothpaste
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GB/T 32677-2016
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Basic data | Standard ID | GB/T 32677-2016 (GB/T32677-2016) | | Description (Translated English) | Determination of inorganic sulfite in toothpaste | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y43 | | Classification of International Standard | 71.100.40 | | Word Count Estimation | 8,830 | | Date of Issue | 2016-08-29 | | Date of Implementation | 2017-03-01 | | Quoted Standard | GB/T 601; GB/T 6682 | | Regulation (derived from) | National Standard Announcement 2016 No.14 | | 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 method for the determination of inorganic sulfite in toothpaste by ion chromatography. This standard is applicable to the determination of soluble inorganic sulfite in toothpaste. | GB/T 32677-2016: Determination of inorganic sulfite in toothpaste---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.
Determination of inorganic sulfite in toothpaste
ICS 71.100.40
Y43
National Standards of People's Republic of China
Detection Method of Inorganic Sulfite in Toothpaste
2016-08-29 released
2017-03-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Management Committee released
Foreword
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is proposed by the China Light Industry Federation.
This standard is the national oral care products Standardization Technical Committee toothpaste sub-standard committee (SAC/TC492/SC1) centralized.
The main drafting unit of this standard. Guangzhou Quality Supervision and Inspection Research Institute, Guangzhou Wei Mei Zi Industrial Co., Ltd., the national light industry toothpaste wax
Quality Supervision and Testing Center.
The main drafters of this standard. Guo Changhong, Li Huiyong, Chen Min Shan, Xia Zhemin, Zheng Wei, Zhao Shanshan, Tan Jianhua, Xi Shaofeng, Wang Jicai,
Xie Wenjie, Zhong Xihao.
Detection Method of Inorganic Sulfite in Toothpaste
1 Scope
This standard specifies the method for the determination of inorganic sulfite in toothpaste by ion chromatography.
This standard applies to the determination of soluble inorganic sulfite in toothpaste.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
Preparation of standard titration solution for GB/T 601 chemical reagents
GB/T 6682 Chemical laboratory water specifications and test methods
3 principle
The inorganic sulphite in the sample was extracted with sodium hydroxide solution, centrifuged and purified, and then separated by anion exchange column.
Detector detection. To qualify the retention time, external standard method.
4 reagent
4.1 Unless otherwise specified, the test water is the primary water specified in GB/T 6682 and its resistivity is greater than or equal to 18.2 MΩ · cm.
4.2 sodium sulfite standard (sodiumsulfite, molecular formula. Na2SO3, CASNo. 7757-83-7). purity to be corrected, the correction side
See Appendix A.
4.3 anhydrous sodium carbonate. excellent grade pure.
4.4 sodium bicarbonate. excellent grade pure.
4.5 sodium hydroxide. excellent grade pure.
4.6 Methanol. Chromatographic Purification.
4.7 Acetone. Chromatographic pure.
4.8 Formaldehyde solution. 37.0% ~ 40.0%, analytical grade.
4.9 carbonate eluent. Weigh 0.3392g anhydrous sodium carbonate (4.3) and 0.0840g sodium bicarbonate (4.4), respectively, in a 1L volumetric flask, add
Appropriate amount of water dissolved after adding 120mL acetone (4.7), then add water volume.
4.10 sodium hydroxide solution c (NaOH) = 100mmol/L. Weigh 4.000g sodium hydroxide (4.5), add water to 1L, mix. Can also make
Prepared with automatic eluent generator OH-type.
4.11 extract (10mmol/L sodium hydroxide solution, which contains a volume fraction of 0.01% formaldehyde). Weigh 0.40g sodium hydroxide
(4.5), dissolved in the appropriate amount, add 0.1mL formaldehyde solution (4.8), then diluted with water to 1L.
4.12 sodium sulfite standard stock solution. accurately weighed 196.9mg sodium sulfite (4.2), placed in 100mL volumetric flask, add appropriate amount of water
So that dissolved, immediately add 1mL formaldehyde solution (4.8), and diluted with water to the mark, shake.
Note. The standard sodium sulfite standard stock solution concentration of sulfur dioxide, the concentration of 1000μg/mL.
4.13 sodium sulfite standard working fluid. accurate removal of 5.00mL sodium sulfite standard stock solution (4.12) to 100mL volumetric flask, with water
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