NEW BOOKS
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90% ARGON 10% METHANE For use as a f l o w g a s w i t h p r o p o r t i o n a l c o u n t e r s a n d as a carrier gas for x-ray Fluorescence S p e c t r o s c o p y .
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.
MATHIESOINI East Rutherford, N. J . Forest Park, Ga., Joliet, III., La Porte, Teicas, Newark, Caljl,
Matheson of Canada, Whitby, Ont. *or more— from Matheson Circle Ne. 142 on Readers' Service Card
Of the major food classes, there are chapters on Fat and Fat Products; Carbohydrates—Sugar and Sugar Prod ucts; Cereals; Milk and Milk Prod ucts; Meat and Meat Products. The discussion on fat and fat products is ex cellent and, by far, the best and most up-to-date. The other chapters arc es sentially stock treatments as given by others earlier. Other chapters cover Food Laws and Standards; sampling and proximate analysis; Food Contamination, Deteri oration and Preservation; Food Colors; and Food Flavors. Flavors are pri marily equated to the natural spices and vanilla. There is almost no indica tion of the great impact that gas chro matography has had in the flavor field. There is a serious error in the data given for the heat inactivation of a botulinum toxin. Although the cita tion of 30 seconds to 5 minutes at 176° F. may be adequate for Type A strain, 30 minutes may be required at this temperature for the toxins of other botulinum strains. While this text is suitable for a course on food composition and analy sis, one must question whether there is a need for a new text which does not significantly update those already in print.
Specify
spec tra-...
quality ACETONE U.V. Cut-off 330 m M Evap, residue Moisture Fluorescence
.0005% max. .05% max. 0.5 ppb as quinine base max.
A powerful solvent that finds many diverse applications. Miscible in all proportions with water and numerous organic solvents among which are alcohol, dimethylformamide, chloroform, ether and most oils. A solvent for fats, oils, waxes, resins, rubber plastics, lacquers and varnishes. Used in extractions which lead to the ulti mate identification and assay of essential oils, chlorophyll, fats, oils, grease and resins.
Division of The Matheson Co., inc. Norwood (Cincinnati) O., East Rutherford, N. J. Circle No. 143 on Readers' Service Card
Inorganic Ultramicroanalysis.
I. P.
WATER DETERMINATIONS
Alimarin, M. N. Petrikova. xv + 151 pages. Macmillan Co.. 60 Fifth Ave., New York. IL N. Y. 1964. $6This book is a translation made by M. G. Hell from the authors' original book entitled Ncorganichcskii ul'tramikroanaliz, published in Moscow in 1960 by the Academy of Sciences. The book contains, essentially, a description of the technique and experimental method used on the ultramicro scale. The main purpose of the work is to help the anah'tical chemist to acquire the experimental technique of ultra microanalysis in work on the micro scope stage with the aid of microma nipulators.
In 10 Minutes or Less U s i n g L / I ' s Karl Fischer A q u a m e t r y A p p a r a t u s , water c o n t e n t of m o s t c h e m i c a l s , d r u g s , f e e d s a n d f o o d s c a n be deter m i n e d precisely in A to 10 minutes. No false e n d p o i n t s are possible
with
L / I ' s c o l o r - c o d e d electrode indicator.
A
t w o - l a m b d a excess of K-F reagent in a 100 m l m e t h a n o l reaction is d e t e c t a b l e . L/I's a p p a r a t u s is odorless a n d m o i s t u r e proof.
Uses original K-F reagent bottle
as reservoir.
I n c l u d e s 1 a n d 25 m l d u a l
b u r e t f o r high accuracy over wide range X l X t h I n t e r n a t i o n a l Congress o f P u r e and Applied Chemistry. IUPAC.
ν + 468 pages. Butterworth, Inc., 7235 Wisconsin Ave. Washington 14. D. C. 1964. $14.50. This book contains lectures given at the X l X t h Congress in the organic chemistry, inorganic chemistry, and analytical chemistry sections. Titles in the analytical chemistry section are: "Variation of the Half-Wave Potential of Organic Compounds with p H " by P. J. Elving, "Modern Progress and Problems in the Determination of
without changing burets. Price: $225.
Delivery stock, satisfaction
guaranteed.
For d e t a i l e d d a t a o n t h i s
i n s t r u m e n t a n d L / I ' s i n e x p e n s i v e auto m a t i c d i l u t o r s a n d REPIPETS ( R e p e t i t i v e Pipets) please write t o
LABINDUSTRIES 1 7 4 0 University A v e n u e Berkeley 3 , California Phone TH 3 - 0 2 2 0 Circle No. 19 on Readers' Service Card VOL.
3 6 , N O . 7 , JUNE 1 9 6 4 ·
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