EMAIL THIS PAGE TO A FRIEND

Rapid communications in mass spectrometry : RCM

A reactor for high-temperature pyrolysis and oxygen isotopic analysis of cellulose via induction heating.


PMID 18543377

Abstract

A reactor for converting cellulose into carbon monoxide for subsequent oxygen isotopic analysis via continuous flow isotope ratio mass spectrometry is described. The system employs an induction heater to produce temperatures >or=1500 degrees C within a molybdenum foil crucible positioned by boron nitride (BN) spacers within a quartz outer sleeve. For samples of a homogeneous working standard cellulose between 300 and 400 microg in size, the blank/signal ratio is <5%, and the long-term precision is 0.30 per thousand (N = 232). For samples of 30 to 100 microg in size, a gas pressure sintered silicon nitride (Si(3)N(4)) outer sleeve replaces the quartz sleeve, the BN spacers are not used, and 6.0-grade carrier He must be used to minimize the blank signal. With these modifications a blank/sample ratio of <5% and long-term precision of 0.30 per thousand (N = 144) are obtained. These results are similar to those achieved using standard high-temperature furnaces, but the reactor is simpler to pack, the system is more economical to run, and samples as small as 30 microg cellulose may be measured. For both reactors memory is significant in the subsequent sample and is believed to be due to exchange with reactor oxygen at temperatures above 1000 degrees C. Further applications might include online preparation of other materials requiring temperatures of 1500-2600 degrees C.

Related Materials

Product #

Image

Description

Molecular Formula

Add to Cart

GF42672427
Molybdenum, foil, not light tested, 25x25mm, thickness 0.003mm, 99.9%
Mo
GF11484750
Molybdenum, foil, not light tested, 25x25mm, thickness 0.01mm, 99.9%
Mo
GF81739457
Molybdenum, foil, not light tested, 50x50mm, thickness 0.003mm, 99.9%
Mo
GF30193781
Molybdenum, foil, not light tested, 50x50mm, thickness 0.0125mm, 99.9%
Mo
GF66431606
Molybdenum, foil, not light tested, 25x25mm, thickness 0.006mm, 99.9%
Mo
GF23412383
Molybdenum, foil, not light tested, 25x25mm, thickness 0.008mm, 99.9%
Mo
GF90888788
Molybdenum, foil, not light tested, 25x25mm, thickness 0.0125mm, 99.9%
Mo
GF98811355
Molybdenum, foil, not light tested, 25x25mm, thickness 0.01mm, annealed, 99.9%
Mo
GF26098027
Molybdenum, foil, not light tested, 50x50mm, thickness 0.001mm, 99.9%
Mo
GF63646218
Molybdenum, foil, not light tested, 50x50mm, thickness 0.0025mm, 99.9%
Mo
GF20045786
Molybdenum, foil, not light tested, 50x50mm, thickness 0.002mm, 99.9%
Mo
GF47495975
Molybdenum, foil, not light tested, 50x50mm, thickness 0.004mm, 99.9%
Mo
GF48792628
Molybdenum, foil, not light tested, 50x50mm, thickness 0.005mm, 99.9%
Mo
GF74350267
Molybdenum, foil, not light tested, 50x50mm, thickness 0.006mm, 99.9%
Mo
GF37145358
Molybdenum, foil, not light tested, 50x50mm, thickness 0.007mm, 99.9%
Mo
GF95631419
Molybdenum, foil, not light tested, 50x50mm, thickness 0.008mm, 99.9%
Mo
GF41758768
Molybdenum, foil, not light tested, 50x50mm, thickness 0.009mm, 99.9%
Mo
GF99294968
Molybdenum, foil, not light tested, 50x50mm, thickness 0.01mm, 99.9%
Mo
GF42252016
Molybdenum, foil, not light tested, 50x50mm, thickness 0.01mm, annealed, 99.9%
Mo
GF61564552
Molybdenum, foil, 100x100mm, thickness 0.5mm, annealed, 99.9%
Mo
GF91334213
Molybdenum, foil, 100x100mm, thickness 2.0mm, annealed, 99.9%
Mo
GF69690291
Molybdenum, foil, 150x150mm, thickness 0.25mm, annealed, 99.9%
Mo
GF60494799
Molybdenum, foil, 250x300mm, thickness 0.1mm, annealed, 99.9%
Mo
GF79159023
Molybdenum, foil, 25x25mm, thickness 0.30mm, annealed, 99.9%
Mo
GF11286345
Molybdenum, foil, 300x300mm, thickness 0.25mm, annealed, 99.9%
Mo
GF04107620
Molybdenum, foil, 50x50mm, thickness 0.20mm, annealed, 99.9%
Mo
GF09623471
Molybdenum, foil, 50x50mm, thickness 0.75mm, annealed, 99.9%
Mo
GF52486780
Molybdenum, foil, 0.2m coil, thickness 0.0125mm, 99.9%
Mo
GF72844386
Molybdenum, foil, 4mm disks, thickness 0.01mm, annealed, 99.9%
Mo
GF94854099
Molybdenum, foil, 4mm disks, thickness 0.125mm, annealed, 99.9%
Mo