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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, Phosphorus (P-PO4), 375PPM, 1L, H20
Item number 4400-375PPM391-1000
225.00 225.0 USD
Diltuion, Nickel (Ni), 1ppm, HNO3, 100mL
Item number 4400-1PPM361-100
67.00 67.0 USD
Instrument Check Standard #1
Item number 4400-CALMX1-100
154.00 154.0 USD
67.00 67.0 USD
Drinking Water Standard Set
Item number 4400-DW-SET
468.00 468.0 USD
Dilution, Calcium (Ca), 10PPM, 250mL, HNO3
Item number 4400-10PPM91-250
101.00 101.0 USD
Dilution, Zirconium (Zr) 10ppm, 100mL
Item number 4400-10PPM691-100
67.00 67.0 USD
Dilution, Zinc (Zn) 50µg/mL, 100mL
Item number 4400-50PPM681-100
67.00 67.0 USD
Instrument Check Standard #8
Item number 4400-CALMX8-100
293.00 293.0 USD
Dilution, Zinc (Zn) 10ppm, 250mL, HNO3
Item number 4400-10PPM681-250
101.00 101.0 USD
Dilution, Yttrium (Y), 10PPM, 100mL
Item number 4400-10PPM671-100
67.00 67.0 USD
Dilution, Yttrium (Y), 100PPM, 500mL, HNO3
Item number 4400-100PPM671-500
145.00 145.0 USD
Dilution, Vanadium (V), 100PPM, 100mL, HNO3
Item number 4400-100PPM651-100
67.00 67.0 USD
Dilution, Uranium (U) 100µg/mL, 100mL
Item number 4400-100PPM641-100
97.00 97.0 USD
Dilution, Titanium (Ti), 10ppm, HNO3/HF, 100mL
Item number 4400-10PPM623-100
67.00 67.0 USD
Dilution, Tin (Sn), 50ppm, HCL, 250mL
Item number 4400-50PPM612-250
101.00 101.0 USD
Dilution, Tin (Sn), 100ppm, 100mL
Item number 4400-100PPM613-100
67.00 67.0 USD
Dilution, Tin (Sn) 10ppm, 100mL
Item number 4400-10PPM613-100
67.00 67.0 USD