1. Reaction of known chemical reaction occurs.2. Reaction can happen quickly.3. Reaction that can indicate the end point.4. Reaction has a specific to the desired high analysis compound5. Not reversible reaction.2.3 analysis tool instrumental analysis) this type of analysis relies on the physical properties of ารมา use discrimination and enter quantity. Physical properties, such as absorption of electromagnetic waves. Release electromagnetic wave, the change of electrical conductivity changes in chemistry. And the movement speed on the media, etc. at present, the tools used in the chemical analysis are various such as
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