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The Chemteq ChemWipes are surface contamination testing and quantification wipes. The uniform color change can be quantified by the color comparator.

ChemWipes Surface Contamination Testing

ChemWipes are surface wipes. Detect and measure toxic chemicals on surfaces.

How to use the ChemWipe? Simply wipe the surface with the ChemWipe, then compare the color formed on the wipe with the color chart in the comparator.

Because of the uniform color change on the wipe, you can know the amount of chemical on the surface using the color comparator.

The colors on the color chart match certain amounts of target substance. By matching the color on the wipe with one color in the chart, you can determine how much substance collected on the wipe. If you know the wiped surface area (cm2 or in2), you can know the average concentration of the substance on the surface.

Beside the color wheel, the color comparator has gray scale wheel to help improve the color matching process.

Available ChemWipes
    1. Aromatic diisocyanates., toluene 2,4 diisocyanate (2,4 TDI), toluene 2,6-diisocyanate (2,6 TDI) and 4,4′  methylene diphenyl diisocyanate (MDI).
    2. Mercury and mercury II compounds
    3. Nickel II compounds..

ChemWipes Leaflet

ChemWipes Surface Contamination Testing

Overall Specifications
aWeight:0.5g (0.02oz)
bDimensions:8.5mm (0.33in), diameter: 32mm (1¼” in)
cTemperature range:4oC to 60oC (39oF to 140oF)
dHumidity range:5% RH to 95%RH
eMinimum detectable limit:Mercury: 2μg

Aromatic diisocyanates: 4mg in 5 minutes or approximately 0.03μg (30ηg) in 30 minutes
fCross interferencesMercury: Acids and strong oxidizers affect the function of the Mercury ChemWipe. No other is known.

Aromatic diisocyanates: None known
gDetection range (color comparator):Mercury: 2μg to 250μg

Aromatic diisocyanates: 2 to 500μg
hComparator increments:Mercury: 2, 5, 10, 25, 50, 100, 250

Aromatic diisocyanates: 2, 4, 6, 10, 15, 25, 50, 100, 300, 500
iColor change:Mercury: Off white to peach

Aromatic diisocyanates: Off white to red
jColor stability:6 months
kStorage temperature:4oC to 25oC, (39oF to 77oF)
lShelf life:2 years
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