Matheson Mixtures Grades

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Due to a large increase in unique mixture specification requests, Matheson revamped our entire mixture product line in 1998. We refined the specifications for our existing grades, and filled in the gaps with new mixture grades. By expanding and improving our Mixture Grades, Matheson has become the best gas mixture manufacturer in the industry. We are committed to providing only our unbeatable Gold Standard in Calibration Mixtures. The Mixture Grade Table represents the Blend, Certification and Traceability specifications for each grade.

Mixture Grade Table
Mixture Grade	Blend Technique	Blend Tolerance		Certification Accuracy	Certification	NIST Traceability
Matheson Reference Standard	Gravimetric	5%50	±1	1%	Dual	SRM, NTRM, NMI, Weight
		500 ppm5%	±2
		1ppm500 ppm	±5
Primary Plus Standard	Gravimetric	5%50%	±1%	1%	Dual	NIST Direct and NIST Indirect, Weight
		500 ppm5%	±2%
		1 ppm500 ppm	±5%
Primary Standard	Gravimetric	5%50%	±1%	1%or 0.02% absolute	Single or Dual	Weights or Traceable Lab Standards
		500 ppm5%	±2%
		1 ppm<500 ppm	±5%
Certified Plus Standard	Gravimetric or Partial Pressure	5%50%	±2%	2%	Single	Weights, Traceable Lab Standards or Titrimetrics
		500 ppm5%	±5%
		5 ppm500 ppm	±10%
		<5 ppm	±20%
Certified Standard	Gravimetric or Partial Pressure	5%50%	±2%	50ppm-50% ±2% 5ppm-50ppm ±5%	Single	Weights, Traceable Lab Standards or Titrimetrics
		500 ppm5%	±5%
		5 ppm500 ppm	±10%
		<5 ppm	±20%
Gravimetric Standard	Gravimetric	2%		2%	Single	Weight
Unanalyzed Standard	Gravimetric or Partial Pressure	10%		None	None	None
Custom Standard	Gravimetric	Varies with component and Concentrations		Varies	Single	Varies
Please refer to brochure BR-69/8-98 for more information. Click here