English
中文
Determination of Significance：
Available potassium is a kind of potassium easily absorbed by plants, and one of important indexes to characterize soil potassium supply. It is important to measure soil available potassium content changes for cultivated land fertility evaluation and application of potassium fertilizer.
Measurement Principle：
Potassium ion in the soil interacts with sodium tetraphenylboron to form potassium tetraphenylborate insoluble white precipitate. The turbidity is proportional to the concentration of potassium ion in a certain range, and available potassium content can be calculated by measuring absorbance of 420 nm.
Self Provided：
Spectrophotometer/microplate reader, centrifuge, transferpettor, oscillator, micro glass cuvette/96 well flat-bottom plate, mortar, 30-50 mesh sieve, formaldehyde and distilled water.
Note：Product information may be optimized and upgraded. Please refer to the actual label information for accuracy.
