Biomedical subjects
Publications and source records attributed to J V Lengerken.
Nitrate-sensitive PVC matrix membrane electrodes produced in the German Democratic Republic are suited for determining nitrates in feeds and plants if the different causative parameters are taken into account. A rational determining method is presented. Comparisons with the o-cresol method showed statistically confirmed agreement.
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On the basis of a study of methods for the determination of vitamin A in mixed feeds, it is shown that both the vitamin A determination according to CARR and PRICE and the determination of anhydro-vitamin A yield valid results. With regard to accuracy, easy performance and productivity, the determination of anhydro-vitamin A is the better suited method.
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Explore the source record for details and available documents.
Explore the source record for details and available documents.