Environmental Reference MaterialsInorganics - NPW PTNon-Potable Water (NPW) PTsProficiency Testing

NPW – Hardness #PEI-137

$67.00

A 250 mL ready-to-use sample packaged in a HDPE bottle to be analyzed for:   (Supplied in duplicate) read more

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Catalog Number:
PEI-137
Study Number

WP-297, WP-298, WP-299, WP-300, WP-301, WP-302, WP-303, WP-304, DMRQA-44

Non-Potable Water NPW PT Study Schedule

2024 NPW PT Study Schedule
Study Number Study Opens Study Closes
WP-297* Jan. 16, 2024 Feb. 29, 2024
WP-298 March 11, 2024 April 24, 2024
WP-299* April 16, 2024 May 30, 2024
WP-300 May 7, 2024 June 20, 2024
WP-301* July 16, 2024 Aug. 29, 2024
WP-302 Aug. 6, 2024 Sept. 19, 2024
WP-303* Oct. 8, 2024 Nov. 21, 2024
WP-304 Nov. 5, 2024 Dec. 19, 2024

Analyte

Magnesium 4.0 – 40 mg/L
Calcium 10 – 100 mg/L
Total Hardness (CaCO3) 40 – 415 mg/L
Calcium Hardness (CaCO3) 25 – 250 mg/L