COLEMAN
J
Coleman automation of Dumas method speeds nitrogen determinations Automating each operation in the Dumas procedure, the Coleman Model 2 9 Nitrogen Analyzer adapts the time-proven method to rapid, exact analysis of an almost unlimited r a n g e of materials. Highly successful tests have been made on experimental substances as well as on routine materials. In addition, many substances formerly analyzed by the Kjeldahl method have yielded to C o l e m a n - i n s t r u m e n t e d analysis with thoroughly satisfactory results — tobacco, leather products, plastic resins, cereals, dog food, fabrics and fertilizers. Combustion times, temperatures and flow rates—all manipulations required in the Dumas p r o c e d u r e — a r e precisely pro-
grammed into the instrument, allowing it to accommodate almost any material dissociable at temperatures under 1100° C. Programming makes analysis simple and straightforward . . . operator technique is eliminated as a source of analytical variability. The instrument determines nitrogen in substances containing from as little as 0 . 0 1 % nitrogen to more than 7 5 % . At the 10% level, it achieves an accuracy of better than ± 0 . 1 5 % . A complete determination takes only eight minutes from sample input to final readout on the digital counter . . . there's no need to wait several hours to get the answer you need right now.
Write for Bulletin C B - 2 5 8 A .
O/ufou wdtaim^tetitims me ifeflhttTatfyd IMOCML witty C O L E M A N
20
C&EN
I N S T R U M E N T S ,
INC.,
M A Y W O O D ,
eftoysefaw
I L L I N O I S
