The pollution you want is the pollution you get.
Pollution standards that aren't standard can give you a lot of trouble. So to save you a lot of trouble (and us lost business), we do a lot of things to make sure you get the exact pollution mixture you want. We use the best calibration equipment there is. And the calibration techniques we use are based on those specified in the preparation of Standard Reference Materials supplied by the National Bureau of Standards Not everybody does that. The gas we put in the cylinder is accurate to within fractional parts per million
when you get it. And to make sure it stays that way as you use it—for years and not just weeks—we developed Spectra-Seal™ aluminum cylinders. They eliminate chemical reactions between gas mixtures and the cylinder walls, so that changes in concentration (if they occur at all) are less than one part per million. For specifics, call or write Hank Grieco, Airco Industrial Gases, 575 Mountain Avenue, Murray Hill, New Jersey 07974.(201)464-8100. He'll tell you how to get exactly what you want.
AIRCO Industrial Gases CIRCLE 4 O N READER SERVICE CARD A N A L Y T I C A L CHEMISTRY, V O L . 4 8 , NO. 12, OCTOBER
1976 ·
947 A
