The lowest concentration giving rise to a colour change was set to 0.13 µg/cm(2) for DMG testing on skin. The DMG test on hands gave positive results in all subjects. ![]() ![]() The imprints were developed by the DMG test. Hand imprints were taken after manipulation of nickel-releasing tools (n = 1), and in workers performing their normal tasks (n = 7). The DMG test and acid wipe sampling for quantification were then performed. Nickel solutions at different concentrations were applied in duplicate on the hands in healthy subjects (n = 5). To develop and evaluate methods for visualization of nickel on the skin by the DMG test and hand imprints. The dimethylglyoxime (DMG) test might be used to establish skin exposure to nickel. ![]() Visualization techniques may be powerful in showing exposures. Nickel is the most common cause of contact allergy and an important risk factor for hand eczema.
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