PHOTOMETRIC DETERMINATION OF BORON BY SOLVENT EXTRACTION USING MONOMETHYLTHIONINE
The successful modification and application to steel analysis of Ducret's methylene blue-boron method lead to a study of other thionine derivativee. Of the commercially available compounds, Azure C monomethylthionine (MMT) proved to be superior to methylene blue. The absorbance maximum for the MMT-BF/sub 3/ complex in several organic solvents and mixtures occurs at 658 m mu . As with methylene blue, alloying elements in the ranges commonly found in steel give no interference. This work was conducted to eliminate two disadvantages of the methylene blue procedure -viz., the high reagent blank which makes dilution of the extract necessary and the relatively narrow concentration range, 0.1 to 15 gamma of boron, which requires extreme aliquoting of high boron solutions. (B.O.G.)
- Research Organization:
- Jones and Laughlin Steel Corp., Pittsburgh
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-000153
- OSTI ID:
- 4130609
- Journal Information:
- Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed., Journal Name: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed. Vol. Vol: 32; ISSN ANCHA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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