The PosiTector Soluble Salt Tester measures the concentration of soluble chlorides. This can be either on a blasted substrate or in an abrasive blasting media. For testing on blasted substrates, DeFelsko has a range of patch systems to assist with capturing a sample. These patch systems capture de-ionised water washed over the surface to extract surface chloride contamination. For testing in abrasive blasting media, DeFelsko has a kit packaged in a carry case. This kit contains the beakers, funnel, filter paper and de-ionised water required for the test. The test procedure is as follows. Abrasive is placed in de-ionised water. This “washes” out the soluble chlorides. From this, a sample of contaminated water extracted. The SST tests samples produced by either method.