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Sensitive to radiation β
this is the answer
4 ppm 5 Biguanide 486810 1
the unique indicator is reactive only to chlorine dioxide
Lead Soil Check Kit_Starter Sensitive to radiation βLead Soil Test strip measures 100, 200, 300, & 400 ppm (mg L) in less than 10 minutes. In addition, the strips are safe to use, packaged individually, non hazardous, and contain no potentially harmful components. Simply collect your soil sample, add the supplied reagent, and dip the test strip (5 tests included) for accurate results. Detects: 0, 100, 200, 300, 400 (tests for lead & other heavy metals)
