Analytical Chart

Blend and Analytical Component Analysis guidelines in accordance to Grade of Mixture.
ALL BLENDS ARE PREPARED IN ACCORDANCE TO NIST.

The customer must request the NIST SRM OR NIST WEIGHT. All values which meet NIST SRM requirements are supplied with the Analysis Label, located on the cylinder


REFERENCES | GLOSSARY | CHARTS | MIXTURES | PURE GAS

Minor
Component

Range
Grade Mixture
Primary Standard EGI Blend Certified Unanalyzed
Blend Tolerance
--10 ppb to 999 ppb--
0.1 ppm to 9.9 ppm
10 ppm to 9999 ppm
--1.0% to 1.90% percent
2.0% to 49.0% percent
+/- 25% of each minor component -------- ----- Cannot be specified
+/- 10% of each minor component +/- 0% of each minor component +/- 20% of each minor component
+/- 5% of each minor component +/- 0% of each minor component +/- 10% of each minor component
+/- 2% of each minor component +/- 0% of each minor component +/- 5% of each minor component
+/- 1% of each minoe component +/- 0% of each minor component +/- 2% of each minoe component
Analytical Tolerance
--10 ppb to 999 ppb--
0.1 ppm to 9.9 ppm
10 ppm to 9999 ppm
--1.0% to 1.90% percent
2.0% to 49.0% percent
+/- 10% of each minor component -------- ----- Mixtures are not analyzed
+/- 2% of each minor component +/- 2% of each minor component +/- 5% of each minor component
+/- 1% of each minor component +/- 1% of each minor component +/- 2% of each minor component
+/- 1% of each minor component +/- 1% of each minor component +/- 2% of each minor component
+/- 1% of each minoe component +/- 1% of each minor component +/- 2% of each minoe component

*CERTIFIED - Means a Standard which has been adopted by NIST and is reflected to blend and perform analysis within accepted industry standards.

Example: If you request a product contain 1% Methane in Air and request a Certified NIST Standard, the chart reflects that the Blend Tolerance will be 5% +/-, and the Analytical Tolerance will be 2% +/-.

*PRIMARY - Means a Standard which is much more restrictive in this chart.

*EGI - This is a Standard adopted by our company which is much more rigid than either of the NIST Standards.

LAST UPDATED: 00 JAN 10
Contact: cfc@c-f-c.com