REPORT complete or joint jurisdiction over a group of standards. Committees working alone or jointly are con stantly seeking to develop new standards and improve existing ones. Committees are organized within the division into five groups: Technical Services, Nonfibrous R a w Materials, Paper and Paperboard, Pulping, and Converted Products and Structural Materials. The Technical Service Group committees—Chemical Methods, Microscopy, Optical Properties, and Physical Methods—have joint gen eral jurisdiction over standards with the committees of the other groups. These other committees are organized in such areas as adhesives testing, pulp testing, paper testing, and container testing. Roland G o h l k e , Dow Chemical C o m p a n y engineer, using Bendix Mass Spectrometer to i d e n t i f y compounds e m e r g i n g f r o m a g a s c h r o m a t o g r a p h .
NOW BENDIX* TIME-OF-FLIGHT MASS SPECTROMETER RECORDS MASS SPECTRA T h e ability to record either mass spectra or mass ratios further widens the versatility of the Bendix Mass Spectrometer. The speed and ease of using this new Analog O u t p u t System are illustrated by the following example: During a recent routine analysis performed at our Research Labora tories Division, one h u n d r e d mass spectra were recorded on a direct writing r e c o r d e r in less t h a n two hours. These were the mass spectra
APPLICATIONS
• Molecular b e a m analysis, includ ing solids' analysis a n d high t e m p e r a t u r e research. Fast r e a c t i o n studies such rocket exhaust analysis.
> N e g a t i v e ion studies. 1
Simple, r a p i d analysis.
Ontario.
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RUGGED—The D o w C h e m i c a l C o m p a n y e x p e r i e n c e d only Ά o f one percent downtime f o r mainte nance during the first six months of o p e r a t i o n . F A S T — 1 0 , 0 0 0 mass spectra p e r second.
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HIGH RESOLUTION — U s a b l e a d j a c e n t mass resolution b e y o n d 5 0 0 a.m.u.
WIDE MASS RANGE —Each spectrum covers 1 through 4 0 0 0 a.m.u.
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VARIOUS OUTPUTS—Oscillo scope used a l o n e o r in c o m b i n a tion with ion pulse counting or recording outputs.
SIMPLE, OPEN C O N S T R U C T I O N — Permits easy modification f o r special problems.
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A L U M I N U M GASKETS, HIGH TEMPERATURE FEEDTHROUGHS— Permit effective b a k e o u t .
outside
CINCINNATI, OHIO Circle No. 24 on Readers' Service Card ANALYTICAL
ATOMIC MASS UNITS Oscillogram of xenon spectrum.
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Cincinnati Division 26 A
«TRADEMARK
FEATURES
ι C h r o m a t o g r a p h output i d e n t i f i c a tion.
> Analysis o f ions c r e a t e d the mass spectrometer.
of the eluted components of a mixture being separated by a gas chromato graph a n d fed continuously into the Bendix Spectrometer for identification. For complete details contact the Cincinnati Division, Dept. C8, 3130 Wasson Road, Cincinnati 8, Ohio. Export Sales: Bendix International Division, 205 E. 42nd St., New York 17, N.Y. Canada: Computing Devices of Canada, Ltd., Box 508, Ottawa 4,
CHEMISTRY
Birth of α Standard
Let us examine how a typical T A P P I Standard would be devel oped, using "Acid-Insoluble Lignin in Wood P u l p , " Τ 222 m-54 as an example. This standard is under the joint jurisdiction of t h e Chem ical Methods Committee and the Pulp Testing Committee. T h e Τ indicates t h a t it is under jurisdic tion of the Testing Division, m t h a t it is a testing method, and δ4 the year of issue. I t s history, as with all T A P P I standards, is printed in the upper right-hand corner of the loose-leaf page as follows: Tentative standard March 1943 Corrected September 1949 Corrected August 1950 Corrected December 1952 Official standard March 1954 Under the present divisional or ganization, this is how the standard came into being. T h e Chemical Methods Committee, wishing to es tablish a method for determining the minimal values for the lignin content of chemical wood pulp, dis cussed this procedure at several meetings and had it evaluated bj· committee members. Members of the Pulp Testing Committe cooper ated and when substantial agree ment was reached within the two groups, a mail ballot was sent with a copy of the method to all mem bers of both groups. After an affirming vote was received from the membership, and indicated cor rections were made, the method was approved by the Testing Division
