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A study of some methods at present used for the determination of lignin

Published online by Cambridge University Press:  27 March 2009

Brynmor Thomas  and
D. G. Armstrong
Brynmor Thomas
Affiliation:
King's College, Newcastle upon Tyne
D. G. Armstrong
Affiliation:
King's College, Newcastle upon Tyne
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Extract

1. Methods for the determination of lignin which involve the use of 72% sulphuric acid have been reviewed.

2. Three methods in common use, viz. those of Norman & Jenkins (modified Common), Crampton & Maynard (modified Lancaster) and of Ellis, Matrone & Maynard were studied, and comparisons made of their relative effectiveness.

3. That of Crampton & Maynard was considered less satisfactory than the modified Norman & Jenkins procedure, on the grounds that it contains several sources of error, the most serious of which are the use of formaldehyde and the failure to remove pentosans.

4. The yields of lignin obtained with the method of Ellis, Matrone & Maynard are appreciably higher than those resulting from the modified method of Norman & Jenkins, by reason of the failure to use a protein correction factor. When such a correction is made, results from the two methods are comparable.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 39 , Issue 4 , October 1949 , pp. 335 - 346
Copyright
Copyright © Cambridge University Press 1949

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