Section 4: Reagents

All reagents used for organic testing shall be analyzed for organic contaminants prior to sampling. These reagents include the cleaning and rinsing solvents, High Purity Liquid Chromatography (HPLC) water, ethylene glycol and the XAD-2 resin.

Solvents: Solvents used for sampling shall be "Distilled-in-Glass" grade or "Pesticide Grade". These include methylene chloride (dichloromethane) hexane and acetone. Solvents may be screened by lot or batch number. Solvents from different batches will require a separate analysis.
HPLC Water: HPLC water for sample recovery is required.
Ethylene Glycol: Distilled-in-glass grade ethylene glycol shall be added to the first impinger. The glycol serves as a backup collection medium should organics break through the XAD-2 resin.
Amberlite XAD-2 Resin: Porous polymeric resin, XAD-2, is necessary to trap the gaseous semi-volatile organic compounds. The resin shall be cleaned and proofed before field use. Once cleaned, the XAD-2 should be stored in wide-mouthed amber glass jars with Teflon-lined caps and wrapped in aluminum foil. Resin not used within four weeks of preparation should be re-cleaned. The analytical procedure and acceptance criteria are described in the method specified in the Chemical Analysis Section. All XAD-2 traps (including the blank train and reagent blanks) must be loaded at the same time in a clean environment.
Ice: Crushed ice is required to maintain the impinger bath at a constant temperature.
Silica Gel: Indicating-type 6-16 mesh silica gel that has been dried at 180°C (356°F) for two hours is required.

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Date modified:: 2013-06-18

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Section 4: Reagents

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This historical page is being kept for research or referencepurposes and will not be updated.

This historical page is being kept for research or referencepurposes and will not be updated.

Section 4: Reagents

Page details

This historical page is being kept for research or reference
purposes and will not be updated.

This historical page is being kept for research or reference
purposes and will not be updated.