Quality Control and Proficiency Samples
136
–
150
of
176
results
136
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.
137
138
SPEX CERTIPREP LLC 3P SIMPLE NUTRIENT
(NSI by Zeptometrix) Wastewater Simple Nutrient PT Sample, 21 mL Concentrate
139
ERA WATERS CORP COLIFORMS WP INTERLAB
One lyophilized quantitative sample to be analyzed for total, fecal and E. coli coliforms.
140
141
ERA WATERS CORP HEXAVALENT CHROMIUM PT SAMPLE
One 15 mL screw-cap vial yields up to 2 liters after dilution. Use with IC or colorimetric methods.
142
143
144
145
146
147
ERA WATERS CORP pH, WasteWatR™, 250mL
One 250 mL whole-volume bottle is ready to analyze. Use with electrometric methods.
148
Hach Company Quaternary Ammonium Compound (QAC) Standard Solution, 100 mg/L, 100 mL
For accuracy checks in Quaternary Ammonium Compound (QAC) determinations. 100 mg/L as CTAB.
149
150