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Water determination in silages by Karl Fischer titration
Author(s) -
Galletti Guido C.,
Piccaglia Roberta
Publication year - 1988
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740430102
Subject(s) - titration , chemistry , silage , fermentation , dry matter , chromatography , water content , food science , pulp and paper industry , botany , organic chemistry , biology , engineering , geotechnical engineering
Karl Fischer titration was applied to water determination in a series of silages including agro‐industrial by‐products. The results were compared with those obtained by oven drying at 105°C, with and without Dulphy and Demarquilly correction for the loss of fermentation products during oven drying. The corresponding dry matter (DM) was significantly higher by the Karl Fischer method than by oven drying, whereas non‐significant differences were observed when the Dulphy and Demarquilly correction was adopted. Accuracy of Karl Fischer titration was proved by comparison with oven drying on rehydrated silage. The Dulphy and Demarquilly equation was satisfactory for the correction of the DM determined by oven drying even in unusual feedstuffs, but required the separate determination of the fermentation products. Such time‐consuming determinations are avoided in the Karl Fischer method, which is simple, rapid and accurate.