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Quality Control and Proficiency Samples

Standard-value, reference solutions designed to act as benchmark values for quality control and process proficiency procedures.
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16 – 30 of 203 results
16

Restek Corporation 1000 μg/mL Cannabidiol (CBD) Standard in P&T Methanol Solvent, Restek
SDP

17

Restek Corporation 1000 μg/mL Delta-9-Tetrahydrocannabinol (THC) Standard in Methanol Solvent, Restek™
SDP

18

Calibration Mix, For ASTM D6042-96, Plastic container testing, Restek Corporation
SDP

19

Restek Corporation Florisil Cartridge Quality Control Standard Mixture, Rev.2, Restek
SDP

20

Restek Corporation Extraction Solvent Stock Solution #1, Restek
SDP

21

Restek Corporation CCME PHC Calibration Mix, Restek
SDP

22

Restek Corporation Butyltin Chloride Calibration Mixture, Restek
SDP

23

Restek Corporation 1000 μg/mL Cannabinol (CBN) Standard in P&T Methonol Solvent, Restek
SDP

24

Restek Corporation Florisil Cartridge Quality Control Standard Mixture, Restek™
SDP

25

Restek Corporation Quality Control Standard Mixture, Revised, Restek
SDP

26

Restek Corporation Extraction Solvent Stock Solution #2, Restek
SDP

27

SPEX CERTIPREP LLC 3P Hardness STND 2/PK

NSI Lab Solutions PEI-145 Hardness Drinking Water Proficiency Test; 2/PK

ENCOMPASS_PREFERRED
28

SPEX CERTIPREP LLC 3P Orthophosphate P QC Conc 21mL

NSI Lab Solutions QCI-141 Orthophosphate-P QC Concentrate Certified Reference Material, 21 mL; 1/EA

ENCOMPASS_PREFERRED
29

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.

ENCOMPASS
30

MANDEL SCIENTIFIC INC WATER STND 0.1G 10X5ML AMPLS

NC2217302 WATER STND 0.1G 10X5ML AMPLS

ENCOMPASS