Analytical instrument with apparatus and method for sample concentrating
A system for analysis of trace concentrations of contaminants in air includes a portable liquid chromatograph and a preconcentrator for the contaminants to be analyzed. The preconcentrator includes a sample bag having an inlet valve and an outlet valve for collecting an air sample. When the sample is collected the sample bag is connected in series with a sorbing apparatus in a recirculation loop. The sorbing apparatus has an inner gas-permeable container containing a sorbent material and an outer gas-impermeable container. The sample is circulated through the outer container and around the inner container for trapping and preconcentrating the contaminants in the sorbent material. The sorbent material may be a liquid having the same composition as the mobile phase of the chromatograph for direct injection thereinto. Alternatively, the sorbent material may be a porous, solid body, to which mobile phase liquid is added after preconcentration of the contaminants for dissolving the contaminants, the liquid solution then being withdrawn for injection into the chromatograph.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- Dept. of Energy
- Patent Number(s):
- None
- Application Number:
- ON: DE87007203
- OSTI ID:
- 6624100
- Country of Publication:
- United States
- Language:
- English
Similar Records
Analytical instrument with apparatus for sample concentrating
Method for preconcentrating a sample for subsequent analysis
Related Subjects
47 OTHER INSTRUMENTATION
AIR
AIR POLLUTION MONITORS
AMINES
CHROMATOGRAPHY
EQUIPMENT
FLUIDS
FLUORINATED ALIPHATIC HYDROCARBONS
GASES
HALOGENATED ALIPHATIC HYDROCARBONS
HAZARDOUS MATERIALS
MATERIALS
MEASURING INSTRUMENTS
MONITORS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
PORTABLE EQUIPMENT
SENSITIVITY
SEPARATION PROCESSES
SYNTHETIC MATERIALS
TEFLON