Briefs The answer to your LC/MS interface problem! 31800 I
N
LC/MS Probe T
E
R
F
A
C
E
Direct Liquid Introduction
•Flow rates as high as δΟμί/ηηιη, with cryopump. • C a n be used with conventional or micro LC. • Uses existing vacuum lock a n d may be fitted to HP 5985B, Finnigan-MAT 3000 a n d 4000 series, Extranuclear a n d Nermag instruments. For further details ask for data sheet 31800 a n d send for our new, free 1984/85 catalog!
vacumetrics C o m m i t t e d to m a k i n g SCIENCE simpler! 2261 Palma Drive · Ventura, CA 93003-5789 (805) 644-7461 · Telex: 4991689 VACUX
Aids for Analytical Chemists Determination of Airborne Free Chlorine in the Presence of Ammonia by Capillary Column Gas Chromatography
1194
John M. Cheplen, Craig Barrow*, and Earl L. White, Analytical Services Unit, Department of General and Biochemical Toxicology, Chemical Industry Institute of Toxicology, P.O. Box 12137, Research Triangle Park, N.C. 27709 Anal. Chem.,56 (1984) Determination of Aluminum in Hemodialysis Concentrates by Electrothermal Atomic Absorption Spectrometry 1196 Pierre Allain*, Yves Mauras, and Francis Der Khatchadourian, Laboratoire de Pharmacologie, Centre Hospitalier Universitaire, 49036 Angers Cedex, France Anal. Chem.,56
(1984)
Dual Sample Injection for Gas Chromatographic Determination of Sulfur Species with Flame 1198 Photometric Detection Floyd A. Barbour*, Robert E. Cummings, and Frank D. Guffey, University of Wyoming Research Corporation, P.O. Box 3395, University Station, Laramie, Wyo. 82071 Anal. Chem.,56 (1984)
CIRCLE 218 ON READER SERVICE CARD
WIÎIGI-I ΤΙ-ΙΙΞ MERITS Cl= RI: AGENT ACIDS
Correction. Identification of Sulfonamide Drugs in Swine Liver by Collision-Induced Dissociation/Mass Analyzed Ion Kinetic Energy Spectrometry 1200
William C. Brumley*, Zhao Min, Jean E. Matusik, John A. G. Roach, Charlie J. Barnes, James A. Sphon, and Thomas Fazio, Division of Chemistry and Physics, Food and Drug Administration, Washington, D.C. 20204 Correction. Determination of Formaldehyde with an Enzyme-Coated Piezoelectric Crystal Detector 1200 George G. Guilbault, Laboratoire de Biologie et Technologie des membranes du CNRS, Université Claude Bernard Villeurbanne, France Correction. Models for Prediction of Retention in Nonsuppressed Ion Chromatography 1200
IN POLY CONTAINERS The scales tell it all...A case of Hydrochloric Acid (HCI) in 8-pint CCI DOT-approved poly containers weighs 42.4 lbs, but a case of the same HCI in six 5-pint glass bottles weighs 56.8 lbs.—14.4 lbs. more. With glass you pay unnecessary extra freight. In addition, the case of CCI poly bottles contains 40 lbs. of acid, but the case of glass bottles contains only 36 lbs. of acid. With CCI poly you get 4 extra lbs. of acid. And the savings are even more by the pallet load. Want more acid and pay less freight? Call us for prices on reagent and electronic grade acids, and the name of your nearest distributor. Columbus Chemical Industries, Columbus, Wl 53925 Tel: (414)623-2140.
CIRCLE 34 ON READER SERVICE CARD 778 A · ANALYTICAL CHEMISTRY, VOL. 56, NO. 7, JUNE 1984
Dennis R. Jenke and Gordon K. Pagenkopf*, Department of Chemistry, Montana State University, Bozeman, Mont. 59717
