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Synonym(s):
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Haloacetic acids (HAA) in Water
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Requisition Form
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G-22
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Test Description
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Haloacetic acids, EPA method 552.2
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Pre-Approval Needed
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N/A
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Supplemental Information Required
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N/A
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Supplemental Form(s)
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N/A
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Performed on Specimens from (sources)
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Environmental
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Sample/Specimen Type for Testing
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Drinking Water
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Minimum Volume/Size Required
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Two 60 mL Amber glass vials with Teflon
(PTFE) lined screw-caps, NO head space allowed
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Storage/Preservation Prior to Shipping
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- Add 6
mg ammonium chloride (NH4Cl) to an empty vial (to dechlorinate).
- Open
the tap and allow the system to flush until the water temperature stabilizes,
at least 5 minutes. Turn flow down to a smooth, pencil thin stream.
- Remove
cap from the bottle, tilt, and place under stream.
- Fill
the bottle with sample water gently, until the meniscus is level with the
bottle top.
- Carefully
place the cap on the bottle, eliminating any air.
- Mix
gently by hand for 1 minute.
- DO
NOT SHAKE.
- Store
at 4°C.
- Store
samples in the dark.
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Transport Medium
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N/A
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Specimen Labeling
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- Label
each bottle with a water proof marker.
- Pre-printing
labels is acceptable.
- Sample
identification must match submission form.
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Shipping and Specimen Handling Requirements
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- Ship according to
Dangerous Goods Regulations, IATA, and/or CFR 49.
- Ship on ice (4°C).
- Store
samples in the dark.
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Method
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EPA 552.2
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Turn-around Time
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Samples must be extracted by the lab
within 14 days of collection.
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Interferences/Limitations
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- Be careful not to add too much
dechlorinating agent to the sample because this may cause interference in the
analysis.
- Matrix interferences may be caused by
contaminants that are coextracted from the sample. The extent of matrix interferences
may vary considerably from sample to sample.
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| Common Causes for Rejection
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Insufficient quantity, unacceptable specimen
type or source, improper shipping conditions, expired media or collection
container, discrepancies between specimen label and submission form, and/or incomplete
or missing submission form
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Additional Information
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If the chlorine residual is >5 mg/L,
additional dechlorinating agent is required. For every 5 mg/L of chlorine
above the initial 5 mg/L add an additional 6 mg of NH4Cl.
For example: a sample with 10 mg/L
chlorine would require 12 mg (6+6) of NH4Cl.
Contact the laboratory at (512) 776-7587
for currently supported analyte list.
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