| 摘要 |
PROBLEM TO BE SOLVED: To provide a practical titrimetric analysis device capable of easily and precisely detecting the neutralization point of a sample from color change of an indicator by titration. SOLUTION: This device for performing acid concentration analysis of a sample with methyl orange added thereto as the indicator by titrating sodium hydroxide comprises a light source (ultraviolet ray emitting diode) emitting an ultraviolet ray of 400 nm band to irradiate the sample therewith; a photoelectric sensor provided oppositely to the light source to detect the intensity of the ultraviolet ray transmitted by the sample; and an analysis means detecting as the neutralization point a serious change point of transmittance according to the discoloration of the indicator from the change in light receiving intensity of the ultraviolet ray detected by the photoelectric sensor. COPYRIGHT: (C)2005,JPO&NCIPI
|
