New Books
your system is no better than your pump!
METERING
PUMPS Peristaltic Action and Reciprocating Piston
Models
if a metering pump is p a r t of y o u r s y s t e m , m a k e sure t h e p u m p matches the high per formance standards of your other instruments. When you choose an a d v a n c e d e s i g n Buchler pump with uniformly adjustable flow rates, you have that assurance. Write for complete in formation.
POLYSTALTIC* PUMP^
* Peristaltic Action through 4 veins * Flow capacity from 2.5 to 1000 m l / h r / v e i n
i n p u a n v a i vin
^ U E I l H B I H b l l b
•*•••• η l-MI¥if»
• Used in column chromatography, aminoacid analyzers, liquid transfer to 10 different locations and infusion of animals • Peristaltic Action through 10 veins • Flow capacity from 1.5 to 650 m I / h r / v e i n
MICROPUMP^
* Liquid in contact with glass. Teflon* or Kel-F** only * Pumps against 20 psi. * Flow rate of each chamber can be set i n d e p e n d e n t l y * Trade Mark E. I. DuPont De Nemours, Inc ** Trade Mark Minnesota Mining & Mfg. Co.
BUCHLER INSTRUMENTS DIVISION NUCLEAR-CHICAGO CORP. A SUBSIDIARY OF G.
The following may be ordered prepaid from the Superintendent of Documents, U. S. Government Printing Office, Washington, D. C. 20402, or prepaid from the National Technical Informa tion Service, Springfield, Va. 22151. (Foreign remittances must be in U. S. exchange and should include an addi tional one-fourth of the publication price to cover mailing costs.)
D.
Nine symposium papers focus atten tion on recent trends and needs in the field of thermal analysis. The contents can be classified under the following principal topics: (a) discussions of the importance of experimental parameters for obtaining information from dta; (b) evaluation of errors of classical calorimetric measurements; (c) review of progress in developing standards for temperature calibration based on dy namic measurements; (d) providing a representative sample of thermal analy sis applications—in high temperature measurements and in studies of bio chemical, polymer, and explosive ma terials; (e) evaluation of errors in dif ferential scanning calorimetry; and (f) modifications of thermogravimetric ap paratus for kinetic studies. Publications of the National Bureau of Standards 1968-69. B. L. Oberholtzer, National Bureau of Standards Special Publication 305, Supplement 1,497 pages. $4.50
• Meters organic solvents through chromatographic columns at preset rates
INSTRUMENTS
U. S. Government Publications
Status of Thermal Analysis: Proceed ings of a Symposium held at Gaithersburg, Md., April 21-22, 1970. Oscar Menis, Ed. NBS Special Pub lication 338. 189 pages. Paperbound. $1
* Pumps liquids and gases in many applications including column chromatography and automatic analyzers
BUCHLER
lytical calorimctry arc analyzed. This book contains valuable reports on biopolymers ; explanations of new thermal analytical methods ; and even some new information on the study of Apollo 11 moon rocks.
SEARLE
&
CO.
1327 SIXTEENTH STREET, FORT LEE, NEW JERSEY, 07024 Circle No. 24 on Readers' Service Card
86 A · ANALYTICAL CHEMISTRY, VOL. 43, NO. 4, APRIL 1971
All publications of the years 1968 to '69 by NBS staff members, whether in the periodical or nonperiodical media of the Bureau or in outside journals and books, are listed with complete bibli ographic citation and accompanied by an abstract that generally runs from 50 to 100 words. Also, full citations, in cluding titles and authors of papers, are now given for the growing number of ''state-of-the-art" conferences, spon sored and cosponsored by NBS, cover ing areas of national or worldwide sci entific and technological interest. There are author and kev word indexes.
