Binary & Multicomponent gas mixtures

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Binary and Multicomponent Calibration Gas Mixtures

Tighter operation controls have been placed on the hydrocarbon industry to optimize production, conform to more stringent environmental and personal safety regulations, and adopt higher levels of system automation. All of these factors have tightened the specifications for calibration standards used for process stream monitoring, impurity analysis and control, environmental compliance, health and safety monitoring, and basic research:

One of Matheson's specialties is engineering, manufacturing and analyzing both binary and multicomponent mixtures. Matheson is able to supply a variety of hydrocarbon mixtures including:

Standard hydrocarbon Blends
Sulfur and alcohol Blends
Mixtures blended in inert background (Nitrogen, Helium, Hydrogen, and Air)
Mixtures blended in hydrocarbon background
Low ppm or ppb concentration impurities in pure alkanes and alkenes
Liquid hydrocarbon blends
Gas-liquid mixtures in piston cylinders
Mixtures for Permissible Exposure Limits (PEL monitors)

We provide a number of minor components from many different functional groups in binary and multicomponent mixtures. We have arranged our components in both alphabetical and functional group orders in order to ease your search in finding the correct mixture component for your needs.

Alphabetical Listing
Functional Group
Aldehydes & Ketones
Organic Nitro Compounds
Organic Sulfur Compounds
Alkanes
Alkenes
Cyclo-Alkanes
Cyclo-Alkenes
Isotopes
Inert and Rare Gases
Aromatics
Amines
Alcohols
Chemical Gases
Miscellaneous Organic Compounds

The following table represents Matheson's existing capabilities for calibration mixtures. The grade availability for each individual component may vary depending on its reactivity, stability, certification capabilities and traceability

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

How to Order Calibration Gas Mixtures

Step 1. Specify the grade of mixture desired (see previous table for specifications of each grade): Matheson Reference; Primary Plus; Primary; Certified Plus; Certified; Gravimetric Unanalyzed

Step 2. Specify the number of cylinders desired (see Step 4)

Step 3. Specify the cylinder size (see Step 4)

Step 4. If you are not sure of the size of quantity of cylinders you need, specify the number of cubic feet, cubic meters, or other volume measurements you require and we will determine the number and size of cylinders for you.

Step 5. Concentrations should be specified for each component in either percentages or ppm. Gases are usually prepared based on volume percent unless you specify otherwise. This chart provides a simple conversion from ppm to percent.

1 ppm	=	0.0001%
10 ppm	=	0.0010%
100 ppm	=	0.0100%
1,000 ppm	=	0.1000%
10,000 ppm	=	1.0000%

Step 6. Specify preparation tolerances–unless otherwise noted. Prep tolerance will be designated by the 7 major categories from Step 1.

Often the preparation tolerance is not important but an absolute maximum or minimum is required, particularly when the mixture is to be used as an upscale or zero reference. Knowing these requirements will help us satisfy your needs.

Step 7. Identify any special mixture requirements you have, i.e., specific impurity analysis, maximum concentration, etc.

Step 8. Specify each component by chemical name. Do not use chemical symbols, as this can lead to errors.

Step 9. Identify desired delivery date.

Step 10. Identify special shipping or billing instructions.

Please refer to BR-69/8-98 and TB-361 for more information.