SPECTROPHOTOMETRIC DETERMINATION OF YTTRIUM OR LANTHANUM WITH METHYLTHYMOL BLUE (in Japanese)
Journal Article
·
· Bunseki Kagaku (Japan)
Yttrium or lanthanum forms a stable, blue complex with methylthymol blue (MTB) at about pH 6 or above, which is supposed to have a one to one composition. At pH 6.4 MTB has an absorption maximum at about 440 m mu and its complex has a maximum at 610 m mu . Beer's law is obeyed over a range of 0 to 120 m mu of yttrium or lanthanum in 25 ml, and the molar extinction coefficient of the complex at 610 m mu is 2.60 x 10/sup 4/ for yttrium or 2.54 x 10/sup 4/ for lanthanum. Some heavy metal ions and large amounts of citrate, fluoride, phosphate, and tartrate ions decrease the absorbance considerably. (auth)
- Research Organization:
- Originating Research Org. not identified
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-18-003688
- OSTI ID:
- 4131220
- Journal Information:
- Bunseki Kagaku (Japan), Journal Name: Bunseki Kagaku (Japan) Vol. Vol: 12; ISSN BNSKA
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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