USE OF A MICROTITRE PLATE READER IN SOIL-PHOSPHORUS ANALYSIS

A technique is described for using microtitre plates and plate reader in soil phosphorus analysis. The molybdate-vanadate method of phosphorus analysis was modified to use a reduced volume of reagents and each sample was read at 405 nm instead of 420 nm. Using standard microtitre plates instead of test tubes, the volume of reagent was reduced 20 X and as many as 96 samples could be read in a total of two minutes.