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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


Internal Standard for 6020 CLP-M
Item number 4400-010041
215.00 215.0 USD
Dilution, Lead (Pb), 50ppm, HNO3, 100mL
Item number 4400-50PPM281-100
67.00 67.0 USD
Dilution, Potassium (K), 250PPM, 100mL, HNO3
Item number 4400-250PPM411-100
67.00 67.0 USD
Dilution, Zirconium (Zr), 100PPM, 100mL, HNO3
Item number 4400-100PPM691-100
67.00 67.0 USD
Dilution, Indium (In), 100ppm, HNO3, 100mL
Item number 4400-100PPM241-100
76.00 76.0 USD
Dilution, Mercury (Hg), 100ppm, 2% HNO3, 250mL
Item number 4400-100PPM331-250
101.00 101.0 USD
Dilution, Sulfur (S), 50PPM, 250mL, H20
Item number 4400-50PPM544-250
101.00 101.0 USD
Dilution, Barium (Ba) 50 PPM 100ML
Item number 4400-50PPM41-100
67.00 67.0 USD
Dilution, Bismuth (Bi) 20 PPB, 100mL
Item number 4400-20PPB61-100
67.00 67.0 USD
Dilution, Gold (Au), 25PPM, 1L (4x250mL), HCL
Item number 4400-25PPM212-1L (4 X 250)
286.00 286.0 USD
Dilution, Mercury, 1ppm 2% HNO3 250mL
Item number 4400-1PPM331-250
128.00 128.0 USD
Dilution, Silver (Ag), 5PPM, 250mL, HNO3
Item number 4400-5PPM511-250
101.00 101.0 USD
Dilution, Scandium (Sc), 100PPM, 100mL
Item number 4400-100PPM481-100
97.00 97.0 USD
Dilution, Lead (Pb), 15PPB, 500mL, HNO3
Item number 4400-15PPB281-500
145.00 145.0 USD
Dilution, Platinum (Pt), 150PPM, 250mL, HNO3
Item number 4400-150PPM402-250
129.00 129.0 USD
Dilution, Platinum (Pt), 50PPM, 250mL, HCL
Item number 4400-50PPM402-250
101.00 101.0 USD
Dilution, Iron(Fe), 5PPM, 500mL
Item number 4400-5PPM261-500
145.00 145.0 USD
Instrument Check Standard #2
Item number 4400-CALMX2-100
137.00 137.0 USD
Dilution, Mercury (Hg), 2ppm, HNO3, 500mL
Item number 4400-2PPM331-500
145.00 145.0 USD
Dilution, NO2, 2ppm, 500mL
Item number 4400-2PPMNO2-500
145.00 145.0 USD