DOE Test Method CHEM-TP-H3.1


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Source:
DOE

Method Name:
Tritium in Water, Wastewater, Milk, and Urine by Liquid Scintillation Counting. Official Name: Tritium in Water, Wastewater, Milk, and Urine by Liquid Scintillation Counting

Description:
Commercially available blend of solvent, scintillator, and nonionic surfactant is added to an aliquot of the sample or its distillate. The mixture is shaken thoroughly and the sample is counted in a liquid scintillation spectrometer system.

Scope:
This procedure determines tritium in many liquid samples by liquid scintillation counting.

Citation:
Dept. of Energy RESL Technical Procedure

Interferences:
(A) pH levels: Water and wastewater samples less than pH 5 must be neutralized and distilled; those that are colored, turbid, or contain high quantities of dissolved solids or high levels of activity other than tritium must be distilled.(B) Milk and urine must be distilled. Only tritium present as HTO will be detected in milk and urine.

QC Requirements:
A blank and a calibration std must be analyzed with each set of samples. Blanks are acceptable if they contain only background quantities of natural radioactivity. Correct performance of the liquid scintillation counter must be verified by an Instrument Performance Analysis (IPA).

Maximum Holding Time:
None given.

Media:
WATER

Subcategory:
Radiochemical

Concentration:
None given.

Precision:
-

Detection:
Lower limit and upper limit are for liquid scintillation spectrometer region settings in keV for counting tritium including tritium counting region, wider tritium region, monitoring of higher energy activity region. Tritium counting efficiency should be in the range of 0.215 to 0.220 dpm.

Revision Number:
Apr-99

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