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SMP 800-C 烟雾毒性测定

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Bombardier SMP800-C Toxic Gas Generation - Toxic Gas Sampling and Analytical Procedures 毒性气体的产生-燃烧烟雾毒性气体的取样和分析流程


Bombardier SMP800-C
标准名称

 
  Toxic Gas Generation - Toxic Gas Sampling and Analytical Procedures
   毒性气体的产生-燃烧烟雾毒性气体的取样和分析流程


Bombardier SMP800-C
标准简述


SMP800-C标准通过有焰燃烧或者无焰燃烧产生的烟雾(如测试方法
ASTM E662)分析其气体的毒性

 


Bombardier SMP800-C
毒性气体:

-    一氧化碳 Carbon Monoxide (CO)

-    二氧化碳 Carbon Dioxide (CO2)

-    氰化氢 Hydrogen Cyanide (HCN)

-    氟化氢 Hydrogen Fluoride (HF)

-    氯化氢 Hydrogen Chloride (HCl)

-    溴化氢 Hydrogen Bromide (HBr)

-    氮氧化物 Nitrogen Oxides (NOX)

-    二氧化硫 Sulfur Dioxide (SO2)

 

 

 

 
Bombardier SMP 800-C Standard

 

Toxic Gas Generation - Toxic Gas Sampling and Analytical Procedures

  


Bombardier SMP 800-C
Brief

 
Gases produced for analysis are generated in a specified, calibrated smoke chamber during standard rate of smoke generation testing (typically ASTM E 662), in both flaming combustion and non-flaming pyrolytic decomposition test modes.

 
Bombardier SMP 800-C
Toxicity Gas Analysis Procedure

 

-          Carbon Monoxide (CO) and Carbon Dioxide (CO2)


CO and CO2 are monitored continuously during the 20 minute test using a non-dispersive infrared (NDIR) analyzer. Data are reported in ppm by volume at 1.5 and 4.0 minutes and at maximum concentration.

 

-          Acid Gas Sampling


HCN, HF, HCl, HBr, NOx and SO2 are sampled by drawing 6 litres of the chamber atmosphere through two midget impingers, each containing 10 ml of 0.25N NaOH, at a rate of 400 ml per minute. The 15 minute sampling period is commenced at the 4 minute mark. All determinations are performed in both the flaming and non-flaming modes and all data are reported in parts per million (ppm) by volume in air.

 

-          Analysis of Impingers for Hydrogen Cyanide (HCN)


Cyanide in the NaOH impinger, as NaCN, is converted to CNCl by reaction with chloramine-T at pH greater than 8 without hydrolyzing to CNO¯. After the reaction is complete, CNCl forms a red-blue colour on addition of a pyridine-barbituric acid reagent. Cyanide is quantified by spectrometric measurement of the increase in colour 578 nm.

 

-          Analysis of Impingers for Hydrogen Fluoride (HF)


Fluoride, as NaF, in the NaOH impinger is determined using SPADNS colorimetry.

 

-          Analysis of Impingers for Hydrogen Chloride (HCl) and Hydrogen Bromide (HBr)


Alkali halides (chloride and bromide) formed in the NaOH solution are measured using ion chromatography with conductivity detection.

 

-          Analysis of Impingers for Nitrogen Oxides (NOX)


Nitrite and nitrate formed in the alkaline solution are determined using ion chromatography with conductivity detection. The nitrite and nitrite results are combined and the total expressed as nitrogen dioxide (NO2).

 

-          Analysis of Impingers for Sulfur Dioxide (SO2)


SO2 is trapped in the NaOH impinger as sulfite and sulfate (SO3¯² and SO4¯²). Hydrogen peroxide is added to convert SO3¯² to SO4¯². Resulting sulfate is determined using ion chromatography with conductivity detection.

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