Inorganics - WS PTProficiency Testing

WS – Orthophosphate #PEI-141

$47.00

A 21 mL concentrate for determination of Orthophosphate. Formulated in the NELAC range of 0.5 - 5.5 mg/L. Each ampule produces 2 liters of sample. (Supplied in duplicate) read more

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Catalog Number:
PEI-141
Study Number

WS-121, WS-122, WS-123, WS-124

2019/2020 WS Study Schedule

2019/2020 WS Study Schedule

Study Number Study Opens Study Closes
WS-120 Oct. 14 Nov. 27, 2019
WS-121 Jan. 7 Feb. 20, 2020
WS-122 April 14 May 28, 2020
WS-123 July 7 Aug. 20, 2020
WS-124 Oct. 14 Nov. 27, 2020