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Testing for Nitrosamines in Sulfur Cured Elastomers

Testing for Nitrosamines in Sulfur Cured Elastomers. Drinking Water Additives Joint Committee Clifton Mclellan December 1 st 2011. Issue Statement.

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Testing for Nitrosamines in Sulfur Cured Elastomers

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  1. Testing for Nitrosamines in Sulfur Cured Elastomers Drinking Water Additives Joint Committee Clifton Mclellan December 1st 2011

  2. Issue Statement • Nitrosamines can form during the manufacture of sulfur cured elastomeric materials resulting in release to drinking water from the joining and sealing products produced from them. • To address this potential, the minimum battery of analysis for these materials in Table 3.1 should be updated to require nitrosamine analysis.

  3. Standard 61 • Minimum test battery requirements • Characterization of the product or material • Determination of the specific section under which product will be evaluated • Identification of all water contact materials and corresponding surface areas • Complete formulation information • Conditions of use • Including volume and temperature • Material specific analysis • High water solubility • Probability of extraction • Known or suspected toxicity of a substance or its byproducts

  4. Rubber Manufacturing • Amines react with Nitrogen oxide compounds to form Nitrosamines • Sources of NO include reinforcing agents, absorption onto fillers, and direct addition • Secondary amines react to form the most stable Nitrosamine compounds • Accelerators used in vulcanization and curing are major sources of secondary amine compounds and their resulting Nitrosamines • Dithiocarbamates • Sulfenamides • Thiurams • Alternatives • Inhibitors • Compounding with non-Nitrosamine generating accelerators

  5. Nitrosamines in Drinking Water

  6. Proposed Additions to Table 3.1 Analysis for N-Nitrosodimethylamine, N-Nitrosomethylethylamine, N-Nitrosodiethylamine, N-Nitrosodi-n-propylamine, N-Nitrosopyrrolidine, N-Nitrosomorpholine, N-Nitrosopiperidine, N-Nitrosodi-n-butylamine, and N-Nitrosodiphenylamine are required when material is sulfur cured.

  7. EPA Method 521: Determination of Nitrosamines in Drinking Water by Solid Phase Extraction and Capillary Column Gas Chromatography with Large Volume Injection and Chemical Ionization Tandem Mass Spectrometry (MS/MS) -September, 2001 • EPA Document#: EPA/600/R-05/054

  8. Actions requested by the Committee Recommendation to ballot the proposed changes.

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