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Determination of sulfide in gypsum plasterboard. Methylene blue spectrophotometric method
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Basic data
| Standard ID | SN/T 3341-2012 (SN/T3341-2012) |
| Description (Translated English) | Determination of sulfide in gypsum plasterboard. Methylene blue spectrophotometric method |
| Sector / Industry | Commodity Inspection Standard (Recommended) |
| Word Count Estimation | 8,863 |
| Quoted Standard | GB/T 6379.2; GB/T 6682; GB/T 21297 |
| Regulation (derived from) | National Quality Inspection (2012) 777; industry standard filing Notice 2013 No. 4 (No. 160 overall) |
| Issuing agency(ies) | General Administration of Customs |
| Summary | This standard specifies the methylene blue spectrophotometric determination of sulfide content of gypsum board. This standard applies to plasterboard sulfide content. Measuring range: gypsum board sulphide content (calculated by hydrogen sulfide) is 0. 50 |
Similar standards
SN/T 5268|SN/T 3341-2012: Determination of sulfide in gypsum plasterboard. Methylene blue spectrophotometric method
---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 sulfide in gypsum plasterboard.Methylene blue spectrophotometric method
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Gypsum board sulfide Determination of methylene blue
Issued on. 2012-12-12
2013-07-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
Please note that some of the content of this document may involve patents. Distribution of this document
Institutions do not assume the responsibility to identify these patents.
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted. Tianjin People's Republic of China Exit Inspection and Quarantine.
The main drafters of this standard. Wei Hongbing, Yang Lifei, Su-Mei Wang, Gao Bo, Su Mingyue, Chan Kwong Chi.
Gypsum board sulfide Determination of methylene blue
1 Scope
This standard specifies the content of the methylene blue spectrophotometric determination of sulfide in plasterboard.
This standard applies to the determination of sulfide content in the gypsum board.
Measurement range. gypsum board sulphide content (hydrogen sulfide calculation) is 0.50μg/g ~ 80.00μg/g.
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 6379.2 measurement methods and results of Accuracy (trueness and precision) - Part 2. Determine the standard measurement method to repeat
Of the basic methods of reproduction
Laboratory use specifications and test methods GB/T 6682 Analysis
GB/T 21297 tapered frosted glass laboratory equipment swap connector
3 Method summary
Sample with a solution of hydrochloric acid decomposition sulfide, hydrogen sulfide produced by cadmium acetate buffer solution absorption, cadmium sulfide precipitate is formed, adding sulfuric acid solution
Liquid hydrogen sulfide, hydrogen sulfide and methylene blue solution and the role of ferric chloride solution to produce methylene blue. With a spectrophotometer
Color quantification.
4 Reagents
Unless otherwise specified, all reagents were of analytical grade, test water for the two water or GB/T 6682 as specified in the above specifications.
4.1 hydrochloric acid (ρ = 1.19g/mL).
4.2 sulfate (ρ = 1.84g/mL).
4.3 acetic acid (ρ = 1.05g/mL).
4.4 cadmium sulfate.
4.5 sodium hydroxide.
4.6 ammonium polyvinyl alcohol.
4.7 pairs of amino-dimethylaniline hydrochloride.
4.8 ferric chloride.
4.9 diammonium phosphate.
4.10 iodate, level.
4.11 sodium thiosulfate.
4.12 sodium carbonate.
4.13 starch.
...
