Inorganics - WS PTProficiency Testing

WS – Silica #PEI-073

$60.00

A 21 mL concentrate for dilution to 1 liter for determination of Silica. Formulated in the NELAC range of 5.0 - 75 mg/L. Each vial produces 2 liters of sample. (Supplied in duplicate) read more

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Catalog Number:
PEI-073
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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 Number Study Opens Study Closes
WS-137 Jan. 8, 2024 Feb. 21, 2024
WS-138 April 3, 2024 May 17, 2024
WS-139 July 2, 2024 Aug. 15, 2024
WS-140 Oct. 15, 2024 Nov. 28, 2024