Quality Control and Proficiency Samples
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SPEX CERTIPREP LLC 3P NPW-Residue, 500mL
(NSI by Zeptometrix) A 500 mL ready-to-use whole volume sample to be analyzed for Total Suspended Solids in the NELAC range of 20-100 mg/L and Total Solids formulated in the NELAC range of 140-800 mg/L.
108
ERA WATERS CORP FLUORIDE STD 1000MG/L 500ML
One 500 mL standard containing Fluoride at 1000 mg/L in H2O. This CRM is covered by ERA's ISO Guide 34 accreditation.
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SPEX CERTIPREP LLC 3P Nitrite N QC Concentrate 21 mL
NSI Lab Solutions QCI-140 Nitrite-N QC Concentrate, 21mL Single
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ERA WATERS CORP HARDNESS POTABLE WATER STANDAR
Hardness, PotableWatR One 250 mL whole-volume bottle is ready to analyze.
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SPEX CERTIPREP LLC 3P Simple Nutrients Concentrate Blind
(NSI by Zeptometrix) A 21 mL concentrate for determination of Simple Nutrients. Each ampule produces 2 liters of sample. The sample includes: Ammonia as N 1.0 - 20 mg/L, Orthophosphate as P 0.5 - 5.5 mg/L, Nitrate as N 2.0 - 25 mg/L, Nitrate/Nitrite-N 2.5 - 25 mg/L
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