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Custom Reference Standards

Inorganic Standards


Peak Performance™ certified reference standards

Standardize Your Standards

CPI International’s Peak Performance™ Inorganic Certified Reference Materials are manufactured for accuracy, consistency, and traceability — delivering reliable results for ICP, ICP-MS, and Atomic Absorption applications.

Set up Auto-ship and relax in the knowledge that you'll never run out of your critical standards again!


Started with Precision

 - High-purity starting materials
 - Sub-boiling distilled acids
 - 18 MΩ de-ionized water

Packaged for Reliability

 - Pre-cleaned, pre-leached HDPE
or LDPE bottles
 - Heat-shrink seals

Engineered for Accuracy

 - Class A volumetric glassware
 - Accurate to ±0.3%
(single-element standards)
 -
Certified against NIST SRM 3100 series

Backed by Integrity

 - NIST-traceable balances
 - Minimum 12-mo. shelf life
 - CoA with every standard


Built on Quality

 - Made in U.S.A.
 - Produced in ISO 17034–accredited facility
 - Tested in ISO/IEC 17025–accredited lab

We'll Mix Customs for YOU!

 - Tailored by your matrix & method
 - Lower your cost per test
 - Warehouse stocking options available


Dilution, Tin (Sn) , HNO3/HF, 500mL
Item number 4400-100PPM613-500
145.00 145.0 USD
Dilution, Sulfur (S), 100ppm in H2O, 250mL
Item number 4400-100PPM544-250
101.00 101.0 USD
Dilution, Sodium (Na), 460PPM, HNO3, 100mL
Item number 4400-460PPM521-100
67.00 67.0 USD
Dilution, Sodium (Na), 250PPM, 100mL, HNO3
Item number 4400-250PPM521-100
67.00 67.0 USD
Dilution, Sodium (Na), 100ppm, HNO3, 100mL
Item number 4400-100PPM521-100
67.00 67.0 USD
Dilution, Silver (Ag), 10PPM, HNO3, 100mL
Item number 4400-10PPM511-100
67.00 67.0 USD
Dilution, Silver (Ag), 10PPM, 250mL, HNO3
Item number 4400-10PPM511-250
101.00 101.0 USD
Dilution, Silver (Ag), 100ppm, HNO3, 100mL
Item number 4400-100PPM511-100
67.00 67.0 USD
Dilution, Silver (Ag), 100PPM, 500mL
Item number 4400-100PPM511-500
145.00 145.0 USD
Dilution, Silicon (Si), 10PPM, 500mL, HNO3
Item number 4400-10PPM504F-500
131.25 131.25 USD
Dilution, Silicon (Si), 100ppm, H2O, 100mL
Item number 4400-100PPM504F-100
67.00 67.0 USD
Dilution, Selenium (Se) 10ppm, 100mL
Item number 4400-10PPM491-100
120.00 120.0 USD
Dilution, Scandium (Sc), 10PPM, 250mL, HNO3
Item number 4400-10PPM481-250
102.00 102.0 USD
Dilution, Potassium (K) 100ug/mL, 100mL
Item number 4400-100PPM411-100
67.00 67.0 USD
Dilution, Gold (Au), 20PPM, 1L, HCL
Item number 4400-20PPM212-1000
246.00 246.0 USD
Dilution, Phosphorus (P), 100PPM, 250mL
Item number 4400-100PPM391-250
101.00 101.0 USD
Dilution, Nickel(Ni), 15PPM, 500mL
Item number 4400-15PPM361-500
145.00 145.0 USD
Dilution, Nickel (Ni), 10PPM, 100mL, HNO3
Item number 4400-10PPM361-100
67.00 67.0 USD
Dilution, Nickel (Ni), 100PPM, 100mL, HNO3
Item number 4400-100PPM361-100
67.00 67.0 USD
Dilution, Molybdenum (Mo), 100PPM, 100mL, HNO3
Item number 4400-100PPM343-100
67.00 67.0 USD