Inorganics - WS PTProficiency Testing

WS – Nitrite #PEI-140

$58.00

A 21 mL concentrate for determination of Nitrite. Formulated in the NELAC range of 0.4 - 2.0 mg/L. Each ampule produces 2 liters of sample. (Supplied in duplicate) read more

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Catalog Number:
PEI-140
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WS-137, WS-138, WS-139, WS-140

Drinking Water Chemistry WS Proficiency Study Schedule

2024 WS Drinking Water Chemistry PT Study Schedule
Study NumberStudy OpensStudy Closes
WS-137Jan. 8, 2024Feb. 21, 2024
WS-138April 3, 2024May 17, 2024
WS-139July 2, 2024Aug. 15, 2024
WS-140Oct. 15, 2024Nov. 28, 2024