Quality Control and Proficiency Samples
ERA WATERS CORP NITRITE QC STANDARD
Nitrite, One 2mL flame-sealed ampule yielding up to 2 liters of sample, Nitrite as N
Pickering Laboratories Inc CAL STANDARD 5ML
Native Sample Standard without Norleucine & Alpha-Amino-Beta-Guanidinopropionic Acid in Lithium Citrate Buffer, 0.25 µmole/mL, each (5 mL /bottle) Amino Acid Analysis.
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.
ERA WATERS CORP AMMONIA/NH3 1000MG PER LTR
One 500 mL standard containing Ammonia as NH3 at 1000 mg/L in H2O. This CRM is covered by ERA's ISO Guide 34 accreditation.
ERA WATERS CORP STANDARD PLATE COUNT QC
Each sample is one lyophilized standard containing a Heterotrophic bacteria present in the range 5-500 CFU/mL or MPN/mL. Use with the Standard Methods 9215B - Pour Plate Method, and Most Probable Number (MPN) Method (simplate).
ERA WATERS CORP MERCURY, WS
One 15 mL screw-cap vial yields up to 1 liter after dilution. Use with CVAA, ICP-MS or CVAFS methods.
SPEX CERTIPREP LLC 3P Minerals QC CRM 500 mL
NSI Lab Solutions QCI-136 Minerals QC Concentrate Certified Reference Material, 500 mL; 1/EA
SPEX CERTIPREP LLC 3P Complex Nutrients QC CRM 21mL
NSI Lab Solutions QCI-139 Complex Nutrients QC CRM, 21mL Single