Skip to main content

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.

ISO-CHEK Cassettes
ISO-CHEK Cassettes
  • 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 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  225-8377 Jars, diameter 37 mm with PTFE-lined cap. Suitable for for transporting and solvent extraction of filter samples in the field or laboratory. 
Calibration Standard , MAMA-HDI, 1 g Each 225-9053  225-9053 Calibration Standard, MAMA-HDI, 1 g  
Calibration Standard , MAMA-HMDI, 1 g Each 225-9056 no image
Calibration Standard , MAMA-IPDI, 1 g Each 225-9054  225-9054 Calibration Standard, MAMA-IPDI, 1 g 
Calibration Standard , MAMA-MDI, 1 g Each 225-9062  225-9062 Calibration Standard, MAMA-MDI, 1 g 
Calibration Standard , MAMA-2,4-TDI and 2,6-TDI, 1 g Each 225-9052  225-9052 Calibration Standard, MAMA-2,4-TDI and 2,6-TDI, 1 g 
Calibration Standard Set , HDI, MDI, IPDI, 2,4-TDI, 2,6-TDI, 1 g each Set 225-9055  225-9055 Calibration Standard, HDI, MDI, IPDI, 2,4-TDI, 2,6-TDI, 1 g each 
Packaging Kit, materials for shipping 10 packages of samplers and jars Each 225-9059  225-9059 Packaging Kit, materials for shipping 10 packages of samplers and jars 

* Limited shelf-life
† Limited shelf-life, freezer storage recommended; refrigerated shipping not required. See Specifications - Sample Stability

Jars for Solvent Extraction, 37 mm with PTFE-lined cap. Suitable for for transporting and solvent extraction of filter samples in the field or laboratory.

225-8377

Calibration Standard, MAMA-HDI, 1 g

225-9053

Calibration Standard, MAMA-HMDI, 1 g

225-9056

Calibration Standard, MAMA-IPDI, 1 g

225-9054

Calibration Standard, MAMA-MDI, 1 g

225-9062

Calibration Standard, MAMA-2,4-TDI and 2,6-TDI, 1 g

225-9052

Calibration Standard Set, HDI, MDI, IPDI, 2,4-TDI, 2,6-TDI, 1 g each

225-9055

Packaging Kit, materials for shipping 10 packages of samplers and jars

225-9059

Documentation
ISO-CHEK Cassettes Instructions

ISO-CHEK Cassettes
Instructions