APPLIED SCIENCE... * The namns in blocks arn t r a d e m a r k s oî A p p l i e d Science.
A Reputation built o n SO years of Innovative Chromatography t Products. Send for our iatest Catalogs!
APPLIED SCIENCE A p p l i e d Science Division Milton Roy Company P.O. Box 4 4 0 , State College. PA 16801 Phone: 8 1 4 - 4 6 6 - 6 2 0 2
Leaders
in Chromatography Supplies and GC . . LC » . TJLC . . Chemicals
Accessories
CIRCLE 5 ON READER SERVICE CARD
FIELD PROVEN TOXIC GAS MONITORS Measure Ozone, Chlorine, Fluorine, Bromine, Iodine at OSHAct TLV levels.
CONVENIENT LOW COST CALIBRATION DEVICES Provide trace gas standards and low air flow determination Continuous, direct reading Sen us 724/727 monitors arc ideal for both survey work and permanent installation Ovei 200(1 units now m the field. • Ranges from 0 - 0 . 1 to 0 • 10 ppm.-vol. • AC or DC portable and AC on-line models available with alarms, recorders and NbMA enclosures. Series 822 and 823 calibration devices provide convenient, low cost methods of trace gas generation and lira air flow determination. Models 823 1 and 823 2 Buhhlo flowmeters automatically time bubble travel through precision bore fluw tubes. Determine pumping rates of 2 cc/min. to 5 liters. Model 822-1 calibration system generates precise calibration standards using permeation tubes. Automatically maintains temperature and diluent flow. Write for complete catalog.
MAST DEVELOPMENT CO.
AIR MONITORING DIVISION 2212 East 12th Street, Davenport, ΙΑ 52803 >„, Phone: 319/326-0141 Telex: 468444 f'ib} Â
(a) UV Photometric Ozone Monitor 'W Permeation Tube Calibration System ( c j Amperonietric Oxidant [ozone and halogen) Monitor Έ i d ) NEMA 4X Instrument Enclosure (e) Automatic Bubble Flowmeter
CIRCLE 137 ON READER SERVICE CARD 302 A • ANALYTICAL CHEMISTRY, VOL. 53, NO. 2, FEBRUARY 1981
