PURCHASED BY THE EPA.
S&S No. 1HY and uniformity in size, weight and strength. Pure borosilicate glass microfibers permit chemical analysis of trace pollutants with a minimum of interfer ence or background.
The U.S. Environmental Protection Agency has renewed their contract for these ultra-pure glass fiber filters for high-volume air sampling. It's official. We will continue to supply EPA with our No. 1HV filters for use in the National Air Surveillance Network. This igjhejecond year in a row they've selected our filter. It makes sense. We designed and developed No. 1HV for that purpose. We made it tough enough to satisfy the strict requirements that EPA set for high volume air sampling. It combines exceptional purity with consistency,
Every No. 1HV filter is serially pre-numbered for positive sample identification, and can be folded easily without cracking. Sheets are 8" χ 10" and packaged 50 to a box. For a descriptive brochure and two sample sheets, write to us on your letterhead. Schleicher & Schuell, Inc., 543 Wash ington Street, Keene, N.H. 03431. Phone (603) 352-3810.
Schleicher& Schuell Schleicher & Schuell, Inc. Keene, New Hampshire 03431 Schleicher & Schull GmbH, D-3354, Dassel, West Germany Schleicher & Schull AG, 8714, Feldbach ZH, Switzerland ANALYTICAL CHEMISTRY, VOL. 52, NO. 6, MAY 1980 · 589 A
