Maintain an independent manufacturing and distribution network for critical gas standards and specialty gases to supply independent gas distributors. We are a wholesale only specialty gas producer only that does not market or sell its products directly to the end user market.
Certified Standard – unless specified in the purchase order, Certified Mixture concentrations are reported utilizing the gravimetric result when the cylinder(s) are filled. Typically are not analyzed with other laboratory equipment unless they have a reactive constituent or it is requested at the time of order.
Primary Standard – Mixture is blended gravimetrically and analyzed utilizing appropriate methods for the gas constituents.
EPA Protocol – Mixture is blended and results are reported per EPA 600/R-12/531.
ISO 17025 – Mixture blend is analyzed and reported per 17025 guidelines and is NIST traceable.
| Concentration Range of Smallest Component | Certified Standard | Primary Standard | EPA Protocol | ISO 17025:2017 | ||||
|---|---|---|---|---|---|---|---|---|
| Blend Tolerance | Analytical Tolerance | Blend Tolerance | Analytical Tolerance | Blend Tolerance | Analytical Tolerance | Blend Tolerance | Analytical Tolerance | |
| 0.1 - 10ppm | +/- 20% | +/- 10% | +/- 10% | +/- 10% | +/- 20% | U < 1% | +/- 10% | +/- 2% |
| 10 - 999ppm | +/- 10% | +/- 5% | +/- 5% | +/- 1% | +/- 10% | U < 1% | +/- 5% | U < 1% |
| 0.1 - 50% | +/- 5% | +/- 2% | +/- 1% | +/- 1% | +/- 5% | U < 1% | +/- 1% | U < 1% |
If there is a question regarding which mix type is suitable for your customer’s application please do not hesitate to call.