METHOD AND DEVICE FOR EXTRACTING NNNITROSO COMPOUND FROM AIR WITHOUT ARTIFICIAL SECONDARY PRODUCTION

Japanese Patent JPS5629141

A

A method and apparatus are disclosed for extracting N-nitroso compounds from air samples without artifact formation of nitrosamines from precursors in the sample. The apparatus includes a cartridge having two zones between a first port and a second port. The first zone, closest to the first port, contains an air pervious packing of a granular, solid phase amine complexing agent. The second zone, closest to the second port, contains an air pervious packing of a mixture of a granular, solid phase amine complexing agent and a particulate sorbent adapted to extract and concentrate N-nitroso compounds from air. The method includes a first step of driving an air sample through the first and second contiguous zones of the cartridge in succession, and a second step of driving an eluent through the second and first zones in succession, or backflushing the cartridge. To extract N-nitroso compounds, the eluent is a polar, or nitrogenous based, solvent for both N-nitroso compounds and the amine complexing agent in the second zone of the cartridge. The method may contain the further step of determining the N-nitroso compound concentration of at least a portion of the eluate which passes from the first zone following the second step of the method.

DEEBUITSUDO PII RAUNDOBERAA
JIYON DABURIYU RAISHIYU

JP10189280A

March 23, 1981

July 26, 1980

Click for automatic bibliography generation  

THERMO ELECTRON CORP

B01D53/54; B01D53/02; B01D53/04; B01J20/281; G01N1/22; G01N31/00; G01N31/22; G01N33/00; (IPC1-7): B01D53/02; B01D53/34; B01J20/02; B01J20/22; G01N1/22; G01N31/00

Previous Patent: 電子血圧計

Next Patent: MEASURING METHOD OF DETERIORATION DEGREE OF FERRITE HEAT-RESISTING STEEL