Tisab III Buffer Concentrate, 475 ml

4210F12 For determination of fluoride ion activity in concentrations from saturated to 10 -6 M (0.02 ppm) Method approved by ASTM for water, drinking water, wastewater and seawater brines and it is approved by EPA, Standard Methods and AOAC for feeds Range saturated to 0.02 ppm Requires 4215F10 reference electrode. Uses 4215F20 fill solution Accessories: Fluoride standard, 0.1000 M ±0.0005 Fluoride standard, 100 ppm ±0.5 ppm 1 or 2 ppm Fluoride standard with TISAB buffer, for use without dilution TISAB III Buffer Concentrate For total ionic strength adjustment in fluoride analysis of drinking water Contains CDTA to release fluoride complexed by iron or aluminum Must be diluted 10:1 before use. Diluted buffer is then mixed 1:1 with standards and samples for adjustment of pH and increased ionic strength to compensate for differences among samples. TISAB II Buffer Similar to 4210F37, but not concentrated Standards and samples are diluted 1:1 directly with the buffer