The invention discloses a
sodium carbonate alkali melting method for measuring multiple elements of soil or
sediment, which comprises the following steps: selecting
anhydrous sodium carbonate as a flux, putting the flux and a substance to be measured into a
platinum crucible, transferring into a
muffle furnace for heating, taking out, rotating, shaking and shaping, putting into
tap water at
room temperature for cooling, adding deionized water, heating for
pyrolysis, and filtering to obtain a filtrate; soaking overnight for 24 hours, fully stirring with a plastic rod, washing with deionized water, dropwise adding 2ml of diluted
hydrochloric acid, heating at low temperature,
mashing fallen substances, stirring, adding
nitric acid-
hydrochloric acid mixed acid, dissolving, transferring, fixing the volume, uniformly shaking, filtering, directly measuring the
boron element, and detecting on a
machine after measuring that other elements are diluted by a proper multiple.