Boron determination in plant tissue by the azomethine H method
- 1 January 1979
- journal article
- research article
- Published by Taylor & Francis in Communications in Soil Science and Plant Analysis
- Vol. 10 (8) , 1099-1108
- https://doi.org/10.1080/00103627909366965
Abstract
A colorimetric method using the azomethine H reagent is described for determining B in an acid extract of plant tissue ash. The method consistently gave the certified value of 33 .+-. 3 ppm B for NBS [National Bureau of Standards, USA] orchard leaf reference material No. 1571 with 3.2% coefficient of variation. Samples were dry ashed and the ash extracted in 10 ml 0.36 N H2SO4 for 1 h at room temperature. Several acidic extractants and extracting conditions were compared which gave the certified value, but involved heating and readjusting the final volume.Keywords
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