NEW
BOOKS
for convenience, an alphabetical list of suppliers with addresses is given at the end of the descriptive sections on stand ard samples and high-purity materials.
1 9 6 4 Book of ASTM Standards. Parts.
American
and Materials,
32
Society for Testing
1916 Race St.. Phila
delphia, Pa. 19103.
*
This publication was first announced
STERILIZING MIXTURES Five s t a n d a r d m i x t u r e s are a v a i l a b l e for s y s t e m s u t i l i z i n g e t h y l e n e o x i d e sterilization.
on page 81 A of the March 1964 issue of
ANALYTICAL
CHEMISTRY.
following p a r t i are now available as of λ lav 1W4:
Part 3 0 .
General Testing Methods;
Quality
Control;
Appearance
Tests; Temperature
Measurement;
Effect of Temperature. Matheson is the world's leading supplier of high purity gas mixtures. Custom and stock mixtures of 95 gases available from mixing laboratories in 5 plants. Write for catalog.
7S standards.
East Rutherford, N. J.
668 pages.
$11; to ASTM
mem
bers, S7.T0. Part
31.
Metallography;
structive
MATHESON
Fifteen
parts were available at t h a t time. The
and
Testing;
Radiation
Chemicals;
Nonde
Radioisotopes
Effects;
Emission,
Industrial
Absorption,
Forest Park, Ga , Joliet, I I I , La Porte, Texas, Newark, Calif
and Mass Spectroscopy.
Matheson of Canada, Whitby, Ont. *or more from Matheson
66 standards.
696 pages.
$12: to ASTM
mem
bers. SS.40.
Circle No. 182 on Readers' Service Card Part
Specify SPECTROQUAUTY
BUTYL ETHER U.V. Cut-off 210 m,u Evap. residue Moisture Fluorescence
.0005% max. .05% max. .5 ppb as quinine base max. Butyl ether is an excellent extradant because of its stability, high boiling point and ease of recovery from aqueous solutions. It is widely used as an extractant for hormones and thioglycolic acid, an intermediate used in hairwaving preparations. Water solubility is 0.03% by weight at 20s C. Miscible with most common organic solvents. Solvent for many resins, alkaloids, oils, esters and organic acids. Used with butyl phosphoric acids as a solvent system to separate zirconium from niobium; and niobium from tantalum, and yttrium group elements from lanthanum group elements.'•Used as a solvent in the spectrophotometry de termination of blood salicylates* and barbituates'^ in the U.V. region. 1. Anal. Chem., 25, 1602-4(1953) 2. U.S. Patent 2,753,240 (1956) 3. Anal. Chem., 32, 1522,(1960) 4. Ibid. 33, 1375,(1961) 5. Ibid. 33, 1902,(1961) Comparative tests prove MC&B Spectroquality Solvents are the highest quality most complete line of solvents for spectrophotometry and fluorometry. Write for wall chart showing UV, 1R, and NIR transmittance of 40 Spectroquality solvents.
32.
Chemical
Metals.
$14 : to ASTM
Bibliography dex.
on
P.
of
standards.
$9.80.
Analytical
Vols. I, II. for
60
members.
Spectroscopy with Society
Analysis
S70 pages,
Flame
Punch-Card In
R.
Mavrodineanu.
Applied
Spectroscopy.
O. Box 7164, Baltimore
IS, Md.
Vol. I. $15; Vol. II, $15; Set of both volumes. $25. Volume I of the Bibliography conTains 925 entries 1848-1956. period 766
covering
Volume
1956-March,
entries.
employing
II
the period covers
The punch-card
the
the
1959, and totals
Peek-a-Boo
index,
principle,
will enable one to search the Bibliog raphy for any subject of subjects
or combination
in a few minutes
without
special equipment of any kind.
can be obtained
the Office of Technical
from
Services,
U. S.
Dept. of Commerce. Washington,
D. C.
Development of Tritium Labeling of
Division of The Matheson Co., inc. Norwood (Cincinnati) Q., East Rutherford, Ν. Υ.
Materials.
Circle No. 183 on Readers' Service Card ·
ANALYTICAL CHEMISTRY
Consolidation
Coal Co. for U. S. Atomic Commission.
Energy
1963. 97 pages.
der NYO 10.178. 82.
78 A
AUTOMATIC SYRINGE ATTACHMENT AT YOUR LABORATORY SUPPLY DEALER
Wê 30.
Organic
. . -the important function of our Automatic Syringe Attachments. Now, any standard syringe becomes an automatic pipette for accurate, repeated delivery of predetermined quantities. And —we've added adapters that (a) fit the lOcc attachment for 10, 50 and 100 microliter syringes; (b) fit the 2cc attachment for l / 4 c c Tuberculin syringes; (c) f i t the lOcc attachment for l c c Tuberculin syringes. • When used in Gas Chromatography, the Attachment prevents gas pressure backflow from forcing plunger out of syringe. For speed, ease, convenience and unlimited reproducibility, you'll do well to look into the
U. S. Government Publications The following
UNLIMITED reproducibi ity
Or-
another
Quality product
of
Scientific Industries INC. Dept. AC664, 220-05 97th AVENUE QUEENS VILLAGE 29, NEW YORK Circle Να. 128 on Readers' Service Card
