ISO-CHEK Cassettes

Suitable for most isocyanates, the patented ISO-CHEK sampling system uses a two-stage filter that results in the simultaneous collection and separation of vapour from aerosol at the point of collection.

Description

  • Accurately samples diisocyanates: HDI, MDI, IPDI, HMDI, 2,4-TDI, and 2,6-TDI
  • The only filter-based system that simultaneously traps and separates both monomers and oligomers
  • For better determinations of control strategies
  • Decreases sample preparation and analysis time by 40% compared to other methods
  • Pre-made calibration standards are available
  • Highly stable — minimizes storage and handling
  • Highly sensitive analysis provides detection limits below current regulated exposure levels
  • Ideal for occupational sampling and environmental surveys
  • Requires only a 15-minute sample time
  • Meets the specifications of several methods
    • ASTM D5932 for 2,4, 2,6-TDI
    • ASTM D6561 for HDI
    • ASTM D6562 for HDI

‡ U.S Patent No. 4,961,916

Specifications

Collection Method Dual filter cassette; 5-µm PTFE membrane traps aerosol phase, glass fibre filter impregnated with MAMA collects vapour phase
Sample Flow Rate 1 L/min
Sample Time 15 minutes
Derivatizing Reagent                              (filter coating for vapour phase) 9-(N-methylaminomethyl) anthracene (MAMA)
Derivatizing Solution                               (for aerosol phase) 1-(2-Methoxyphenyl) piperazine (MOPIP)
Supplied in jars containing 5 ml of solution (0.5 mg MOPIP in 5 ml toluene)
Sample Stability Can be stored at 4°C (39.2°F) for up to 10 days. Store and prepare in solvent-free environments. SKC recommends sample analysis as soon as possible.
Analysis Reverse phase HPLC with UV and fluorescence detection (FD)
Quantitation Limit 0.15 ppb for 2,4-TDI, 2,6-TDI, 1,6-HDI, IPDI, MDI, HMDI monomer
1.5 ppb for 1,6-HDI and MDI oligomers
Limit of Detection 0.2 mg/m3 for 2,4-TDI and 2,6-TDI
0.6 mg/m3 for 1,6-HDI
0.3 (UV)/0.08 (FD) mg/m3 for MDI †
† First number is with UV detector, the second is with a fluorescence detector (FD)

ISO-CHEK Cassettes

Description Pack Size Part Number
ISO-CHEK Sampling Cassettes *, preloaded clear cassettes for isocyanates, requires Derivatizing Solution 12 225-9022
36 225-9022A
* Limited shelf-life – see Specifications – Sample Stability

Accessories

Description Pack Size Part Number
Jars, 37 mm with PTFE-lined cap. Suitable for for transporting and solvent extraction of filter samples in the field or laboratory. 36 225-8377
Calibration Standard †, MAMA-HDI, 1 g Each 225-9053
Calibration Standard †, MAMA-HMDI, 1 g Each 225-9056
Calibration Standard †, MAMA-IPDI, 1 g Each 225-9054
Calibration Standard †, MAMA-MDI, 1 g Each 225-9062
Calibration Standard †, MAMA-2,4-TDI and 2,6-TDI, 1 g Each 225-9052
Calibration Standard Set †, HDI, MDI, IPDI, 2,4-TDI, 2,6-TDI, 1 g each Set 225-9055
Packaging Kit, materials for shipping 10 packages of samplers and jars Each 225-9059
* Limited shelf-life
† Limited shelf-life, freezer storage recommended; refrigerated shipping not required. See Specifications – Sample Stability

Documentation

ISO-CHEK Cassettes Instructions