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	NIST-Traceable to SRM 3100 Series	Certificate of Analysis and MSDS
	18-month accuracy and stability guarantee	99.999% certified accuracy to ±0.3% on single element standards
	Single and multi-element blends shipped from stock (within 2 business days, most same day)	Custom blends prepared element by element to your specifications and shipped within 7 business days)

Certified Quality

	All CPI International Standards are prepared from high-purity starting material, sub-boiling distilled acids and 48-megaohm de-ionized water. We only use Class A volumetric labware calibrated under NIST guidelines.
	Starting materials are weighed to ± 0.1mg on analytical balances calibrated by NIST-traceble Class F weights. The acids and de-ionized water are regularly tested by ICP-MS to ensure purity. Each Standard's packed in an HDPE (LDPE when applicable) Passport IP2 bottle, pre-leached and secured with a heat-shrink seal.
	Every standard is certified gravimetrically or instrumentally against NIST SRM 3100 Series spectrometric solutions. A Certificate of Analysis and a Material Safety Data Sheet are shipped with every Standard. CPI International guarantees the accuracy of single element standards to ±0.3% for 18 months from date of shipment.