| http://www.w3.org/ns/prov#value | - Surfactants and polymers can be particularly useful in formulations containing a cationic tetrazolium salt as an oxidized indicator since surfactants such as polyoxyethylene ether, available under the trademark TRITON??? X-100 from Sigma Chemical Co., and polymers such as polyvinylalcohol and polyvinylpyrrolidone, available as PVP K30 from Aldrich Chemical Co., appear to help solubilize the cation
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