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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, Mercury (Hg), 1ppm, HCl, 100mL
Item number 4400-1PPM332-100
67.00 67.0 USD
Dilution, Manganese (Mn), 100ppm, 2% HNO3, 100mL
Item number 4400-100PPM321-100
67.00 67.0 USD
Dilution, Lead (Pb), 20ppb, 250mL, HNO3
Item number 4400-20PPB281-250
103.00 103.0 USD
Dilution, Iron (Fe), 10PPM, 100mL
Item number: 4400-10PPM261-100
67.00 67.0 USD
Dilution, Indium (In), 10PPM, 100mL
Item number 4400-10PPM241-100
67.00 67.0 USD
Dilution, Holmium (Ho), 100PPM, HNO3
Item number 4400-100PPM231-100
138.00 138.0 USD
Dilution, Gold (Au), 250PPB, 500mL, HCL
Item number 4400-250PPB212-500
145.00 145.0 USD
Dilution, Gold (Au), 20ppm, HCl, 500mL
Item number 4400-20PPM212-500
188.00 188.0 USD
Dilution, Gold (Au) 100ppm, 5% HCl, 100mL
Item number 4400-100PPM212-100
67.00 67.0 USD
Dilution, Flouride (F), 10PPM, 100mL
Item number 4400-10PPMF-100
67.00 67.0 USD
Dilution, Copper (Cu), 10ppm, HNO3, 100mL
Item number 4400-10PPM141-100
67.00 67.0 USD
Dilution, Chromium 6+ (Cr6+), H2O, 100mL
Item number 4400-50PPM127-100
67.00 67.0 USD
Dilution, Chromium (Cr+6), 100PPM, H20, 100mL
Item number 4400-100PPM127-100
141.00 141.0 USD
Dilution, Chromium (Cr), 5PPB, 100mL, HNO3
Item number 4400-5PPB121-100
67.00 67.0 USD
Dilution, Arsenic (As), HNO3, 100ug/mL, 100mL
Item number 4400-100PPM31-100
67.00 67.0 USD
Dilution Strontium (Sr), 100PPM, 100mL, HNO3
Item number 4400-100PPM531-100
67.00 67.0 USD
Dilution, Phosphorus (P-PO4), 50PPM, 1L, H20
Item number 4400-50PPM391-1000
25.00 25.0 USD
635.00 635.0 USD
Initial Calibration Verification (ICV) Standard 1
Choose from 100 mL and 500 mL volumes.
0.0 USD
Dilution, Cerium (Ce), 100ppm, 2% HNO3, 100mL
Item number 4400-100PPM101-100
60.00 60.0 USD