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Position: Chinese Standard in English/GB/T 14678-1993
GB/T 14678-1993   Air quality -Determination of sulfuretted hydrogen, methyl sulfhydryl, dimethyl sulfide and dimethyl disulfide -Gas chromatography (English Version)
Standard No.: GB/T 14678-1993 Status:valid remind me the status change

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Language:English File Format:PDF
Word Count: 4000 words Price(USD):120.0 remind me the price change

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Implemented on:1994-3-1 Delivery: via email in 1 business day
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Standard No.: GB/T 14678-1993
English Name: Air quality -Determination of sulfuretted hydrogen, methyl sulfhydryl, dimethyl sulfide and dimethyl disulfide -Gas chromatography
Chinese Name: 空气质量 硫化氢、甲硫醇、甲硫醚和二甲二硫的测定 气相色谱法
Chinese Classification: Z15    Analysis methods for toxic substances in atmosphere
Professional Classification: GB    National Standard
ICS Classification: 13.040.20 13.040.20    Ambient atmospheres 13.040.20
Issued by: AQSIQ; MEP
Issued on: 1993-9-18
Implemented on: 1994-3-1
Status: valid
Language: English
File Format: PDF
Word Count: 4000 words
Price(USD): 120.0
Delivery: via email in 1 business day
Air quality - Determination of sulfuretted hydrogen, methyl sulfhydryl, dimethyl sulfide and dimethyl disulfide - Gas chromatography 1 Application scope 1.1 This method is applicable to the simultaneous determination of sulfuretted hydrogen, methyl sulfhydryl, dimethyl sulfide and dimethyl disulfide in the exhaust of malodorous pollution sources and the ambient air. The limits of detection of the four components in flame photometric detector of gas chromatograph (GC-FPD) are 0.2 × 10-9 ~ 1.0 × 10-9 g. If the concentration of the four components in the gas sample is higher than 1.0 mg/m3, 1 ~ 2 mL of gas sample may be directly injected into gas chromatograph for analysis. Concentrate 1 L of gas sample and the limits of detection of the four components are 0.2 × 10-3 ~ 1.0 × 10-3 mg/m3. 2 Principle In this method, a vacuum-treated 1 L gas cylinder is used to collect malodorous gas samples from fugitive emission sources or ambient air sample, and a polyester plastic bag is used to collect malodorous gas sample from exhaust pipes. Gas sample with high sulfide content may be directly taken with syringe for 1 ~ 2 mL and injected into gas chromatograph equipped with flame photometric detector (FPD) for analysis. If the absolute amount of sulfide in the direct injection volume is lower than the detection limit of the instrument, the sulfide in 1 L gas sample shall be concentrated by a concentration tube at low temperature with liquid oxygen as refrigerant. After concentration, the concentration tube is connected to the analysis system of chromatograph and heated to 100°C, so that all concentrated components flow through a chromatographic column for separation, and various sulfides are quantitatively analyzed by FPD. In a certain range of concentration, the logarithm of sulfide content is proportional to that of chromatographic peak height. 3 Reagents and materials 3.1 Reagent 3.1.1 Benzene (C6H6): analytical grade (toxic), without interference peak after chromatography. If there is an interference peak, it needs to be redistilled in a glass distiller. 3.1.2 Sulfuretted hydrogen (H2S): The purity is more than 99.9%, and the hydrogen sulfide prepared in the laboratory needs to be calibrated. 3.1.3 Methyl sulfhydryl (CH3SH): analytical grade. 3.1.4 Dimethyl sulfide [(CH3)2S]: analytical grade. 3.1.5 Dimethyl disulfide [(CH3)2S2]: analytical grade. 3.1.6 Phosphoric acid (H3PO4): analytical grade. 3.1.7 Acetone (CH3COCH3): analytical grade. 3.1.8 Liquid oxygen. 3.2 Carrier gas and auxiliary gas of chromatograph
Foreword i 1 Application scope 2 Principle 3 Reagents and materials 4 Apparatus 5 Samples 6 Analysis operation 7 Representation of results 8 Precautions
GB/T 14678-1993 is referred in:
* GB 16889-2008 Standard for Pollution Control on the Landfill Site of Municipal Solid Waste
* GB 16171-2012 Emission standard of pollutants for coking chemical industry
* GB 31572-2015 Emission standard of pollutants for synthetic resin industry
*GB 14554-1993 Emission Standards for Odor Pollutants
*GB 31573-2015 Emission standards of pollutants for inorganic chemical industry
*DB11/501-2017 Integrated Emission Standards of Air Pollutants
*DB12/ 059-2018 Emisson standards for odor pillutants
*GB 31573-2015/XG1-2020 Emission standards of pollutants for inorganic chemical industry, inckudes Amendment 1
Code of China
Standard
GB/T 14678-1993  Air quality -Determination of sulfuretted hydrogen, methyl sulfhydryl, dimethyl sulfide and dimethyl disulfide -Gas chromatography (English Version)
Standard No.GB/T 14678-1993
Statusvalid
LanguageEnglish
File FormatPDF
Word Count4000 words
Price(USD)120.0
Implemented on1994-3-1
Deliveryvia email in 1 business day
Detail of GB/T 14678-1993
Standard No.
GB/T 14678-1993
English Name
Air quality -Determination of sulfuretted hydrogen, methyl sulfhydryl, dimethyl sulfide and dimethyl disulfide -Gas chromatography
Chinese Name
空气质量 硫化氢、甲硫醇、甲硫醚和二甲二硫的测定 气相色谱法
Chinese Classification
Z15
Professional Classification
GB
ICS Classification
Issued by
AQSIQ; MEP
Issued on
1993-9-18
Implemented on
1994-3-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
Language
English
File Format
PDF
Word Count
4000 words
Price(USD)
120.0
Keywords
GB/T 14678-1993, GB 14678-1993, GBT 14678-1993, GB/T14678-1993, GB/T 14678, GB/T14678, GB14678-1993, GB 14678, GB14678, GBT14678-1993, GBT 14678, GBT14678
Introduction of GB/T 14678-1993
Air quality - Determination of sulfuretted hydrogen, methyl sulfhydryl, dimethyl sulfide and dimethyl disulfide - Gas chromatography 1 Application scope 1.1 This method is applicable to the simultaneous determination of sulfuretted hydrogen, methyl sulfhydryl, dimethyl sulfide and dimethyl disulfide in the exhaust of malodorous pollution sources and the ambient air. The limits of detection of the four components in flame photometric detector of gas chromatograph (GC-FPD) are 0.2 × 10-9 ~ 1.0 × 10-9 g. If the concentration of the four components in the gas sample is higher than 1.0 mg/m3, 1 ~ 2 mL of gas sample may be directly injected into gas chromatograph for analysis. Concentrate 1 L of gas sample and the limits of detection of the four components are 0.2 × 10-3 ~ 1.0 × 10-3 mg/m3. 2 Principle In this method, a vacuum-treated 1 L gas cylinder is used to collect malodorous gas samples from fugitive emission sources or ambient air sample, and a polyester plastic bag is used to collect malodorous gas sample from exhaust pipes. Gas sample with high sulfide content may be directly taken with syringe for 1 ~ 2 mL and injected into gas chromatograph equipped with flame photometric detector (FPD) for analysis. If the absolute amount of sulfide in the direct injection volume is lower than the detection limit of the instrument, the sulfide in 1 L gas sample shall be concentrated by a concentration tube at low temperature with liquid oxygen as refrigerant. After concentration, the concentration tube is connected to the analysis system of chromatograph and heated to 100°C, so that all concentrated components flow through a chromatographic column for separation, and various sulfides are quantitatively analyzed by FPD. In a certain range of concentration, the logarithm of sulfide content is proportional to that of chromatographic peak height. 3 Reagents and materials 3.1 Reagent 3.1.1 Benzene (C6H6): analytical grade (toxic), without interference peak after chromatography. If there is an interference peak, it needs to be redistilled in a glass distiller. 3.1.2 Sulfuretted hydrogen (H2S): The purity is more than 99.9%, and the hydrogen sulfide prepared in the laboratory needs to be calibrated. 3.1.3 Methyl sulfhydryl (CH3SH): analytical grade. 3.1.4 Dimethyl sulfide [(CH3)2S]: analytical grade. 3.1.5 Dimethyl disulfide [(CH3)2S2]: analytical grade. 3.1.6 Phosphoric acid (H3PO4): analytical grade. 3.1.7 Acetone (CH3COCH3): analytical grade. 3.1.8 Liquid oxygen. 3.2 Carrier gas and auxiliary gas of chromatograph
Contents of GB/T 14678-1993
Foreword i 1 Application scope 2 Principle 3 Reagents and materials 4 Apparatus 5 Samples 6 Analysis operation 7 Representation of results 8 Precautions
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