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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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61 – 75 of 200 results
61

SPEX CERTIPREP LLC 3P DISSOLVED OXYGEN 125ML QC WP

NSI Lab Solutions Dissolved Oxygen (WP)

ENCOMPASS_PREFERRED
62

SPEX CERTIPREP LLC 3P OXYGENATES 2ML QC SAMPLE WS

NSI Lab Solutions Oxygenates (WS)

ENCOMPASS_PREFERRED
63

SPEX CERTIPREP LLC 3P URANIUM 21ML QC SAMPLE WS

NSI Lab Solutions Uranium (WS)

ENCOMPASS_PREFERRED
64

SPEX CERTIPREP LLC 3P CHLORDANE 2ML QC SAMPLE WS

NSI Lab Solutions Chlordane (WS)

ENCOMPASS_PREFERRED
65

SPEX CERTIPREP LLC 3P CYANIDE 20ML QC SAMPLE WS

NSI Lab Solutions Cyanide (WS)

ENCOMPASS_PREFERRED
66

SPEX CERTIPREP LLC 3P OIL AND GREASE 3.2ML QC WP

NSI Lab Solutions Oil and Grease (WP)

ENCOMPASS_PREFERRED
67

SPEX CERTIPREP LLC 3P ACIDITY 100ML QC SAMPLE WP

NSI Lab Solutions Acidity (WP)

ENCOMPASS_PREFERRED
68

SPEX CERTIPREP LLC 3P DEMAND 21ML QC SAMPLE WP

NSI Lab Solutions Demand (WP)

ENCOMPASS_PREFERRED
69

SPEX CERTIPREP LLC 3P NITRITE 20ML QC SAMPLE WP

NSI Lab Solutions Nitrite (WP)

ENCOMPASS_PREFERRED
70

SPEX CERTIPREP LLC 3P Hardness QC 250 mL

NSI Lab Solutions QCI-145 Hardness QC Certified Reference Material, 250 mL; 1/EA

ENCOMPASS_PREFERRED
71

SPEX CERTIPREP LLC 3P PH 250ML 2ML QC SAMPLE WS

NSI Lab Solutions pH (WS)

ENCOMPASS_PREFERRED
72

SPEX CERTIPREP LLC 3P TURBIDITY 21ML QC SAMPLE WS

NSI Lab Solutions Turbidity (WS)

ENCOMPASS_PREFERRED
73

SPEX CERTIPREP LLC 3P Hardness QC CRM 250 mL

NSI Lab Solutions QCI-137 Hardness QC CRM, 250mL Single

ENCOMPASS_PREFERRED
74

SPEX CERTIPREP LLC 3P VOLATILE SOLIDS 20ML QC WP

NSI Lab Solutions Volatile Solids (WP)

ENCOMPASS_PREFERRED
75

SPEX CERTIPREP LLC 3P TRACE METALS 21ML QC SAMPLE WP

NSI Lab Solutions Trace Metals 21mL (WP)

ENCOMPASS_PREFERRED