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.
- 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
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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 oligomersLimit 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)
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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
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Accessories
Description Pack Size Part Number Part Number Jars, 37 mm with PTFE-lined cap. Suitable 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 
Derivatizing Solution for ISO-CHEK®, 5 ml of MOPIP in toluene, in jars PK/12 225-9050 
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
