scheme de comparare interlaboratoare

1. 593 ERA PT Residual Chlorine, WS 357: 13.04-28.05; One 2 mL flame-sealed ampule yields up to 2 liters after dilution. Free Residual Chlorine= 0.5- 3 mg/L Total Residual Chlorine= 0.5- 3 mg/L 2. 842 ERA PT Halomethanes (THMs), WS 357: 13.04-28.05.2026; One 2 mL flame-sealed ampule yields in excess of 200 mL after dilution. Use with EPA Methods 502.2, 524.2, 551, or other applicable method. Contains all of the analytes below at 5–50 μg/L. Bromodichloromethane= 5-50 µg/L Bromoform= 5- 50 µg/L Chlorodibromomethane= 5- 50 µg/L Chloroform= 5- 50 µg/L 3. 1050 ERA PT Particulate Matter on Filter Paper, AE 078: 30.10-14.12.2026; One filter paper sample packaged in a 50 mm polystyrene petri dish containing a single 47 mm tissue quartz filter ready for use with EPA Methods 5, 5A, 5B, 5D, 5F, or other applicable methods. Particulate matter= 50- 600 mg/filter 4. 696 ERA CRM Residual Chlorine, WS; One 2 mL flame-sealed ampule yields up to 2 liters after dilution. Free Residual Chlorine= 0.5- 3 mg/L Total Residual Chlorine= 0.5- 3 mg/L, conform oferta nr G154-2026