Rapid gravimetric determination of Si in rice straw

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Abstract
The Si content of rice straw is used as a measure of the Si status of rice plants, the growth and grain production of which are reduced when plant Si is low. Straw Si often is determined gravimetrically following digestion of plant tissue. A new, rapid gravimetric procedure has been developed for determining Si in rice straw. The straw is oxidized, washed free of various components, and SiO2is developed and weighed in fritted glass Gooche crucibles. The rapid method reduces the analysis time, reduces glassware requirements, and eliminates analyte transfers.

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