stand-up sodium thiosulfate bags for potable water sampling, 4 oz

Designed for sampling of chlorinated water from municipalities, swimming pools, wastewater, and other areas|Use these sterile LDPE bags to safely hold your water samples. To use, simply flip bag around wipe/tape and bend wire to seal. Puncture-proof tabs ensure wire will not poke through even after extensive use. Bags feature a convenient write-on strip. Sodium Thiosulfate Bags are EPA approved for potable water collection; contain a nontoxic, nonnutritive 10-mg active ingredient tablet of sodium thiosulfate to neutralize the chlorine at the point of collection. Stand-Up Sodium Thiosulfate Bags add a special gusset at the bottom which flattens out when water is put in the bag, allowing it to stand up completely by itself. No rack or holder is needed to keep it upright. Sodium Thiosulfate Bag for Wastewater meets National Environmental Laboratory Accreditation Conference (NELAC) standard for sampling wastewater treated with 15 mg/L of chlorine; contains 30 mg of nontoxic, nonnutritive sodium thiosulfate. Coli-Test Bag has a special barrier film that provides a visual color change when total coliform or E. coli is present in samples; contains 10 mg of sodium thiosulfate and are self-standing.