Weighing 2.1 (qravimetric analysis), this type of analysis done by taking samples coming to destroy the substances and want to know the weight of the weighing sample object, such as a reduction in soil moisture contents. How to find organic objects by burning or by taking a sample analysis may come to know substances extracted in quantities and then settling slurry. The substance and weight scales, such as bringing the soil Ca and then precipitate biting quarter with ammonium oxalate solution Ca, then remove the Calcium oxalate that sediment has to know the quantity weighed in Ca, etc.2.2 measuring volume or the Tai Te concentrate (volumetric analysis, or titrimetric analysis), this type of analysis is made by bringing an object to change the example to solvents or extraction of the desired substance. Note the quantity released is in aqueous solution and apply this chemical reaction has to do with the solution. The standard reaction at the appropriate volume should have a circular analysis of the treasure, as follows:
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