University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Commercial product -> lotion -> eye

Citations 2

"Flow Injection Spectrophotometric Determination Of Boron With D-sorbitol Using Methyl Orange As An Indicator"
Analyst 1991 Volume 116, Issue 7 Pages 711-714
Kazuko Nose and Michio Zenki

Abstract: Sample solution was injected into a carrier stream (1 mL min-1) of water or aqueous 0.6% NaCl (for seawater) and mixed with a stream (1 mL min-1) of 0.2 mM methyl orange (C.I. Acid Orange 45) in 1.25 M D-sorbitol. The mixture was passed through a reaction coil (4 m x 0.5 mm) and the absorbance was measured at 520 nm. The calibration graph was almost rectilinear up to 1.2 mg L-1 of B and the detection limit was 20 µg l-1. The coefficient of variation was 0.3 and 0.5% for 0.5 and 1.2 mg L-1 of B, respectively. The sampling rate was ~20 h-1. The method was applied to eye lotions and seawater; recoveries were 98 to 102% and 96 to 104%, respectively.
Boron Spectrophotometry

"Determination Of Boron By Spectrophotometric FIA Using Azomethine H"
Bunseki Kagaku 1993 Volume 42, Issue 6 Pages 351-355
Nose, K.;Zenki, M.;Shimoishi, Y.

Abstract: A sample solution containing 1 ppm B was injected into a carrier stream of water and mixed with a reagent stream of 0.25% azomethine H, 1% asorbic acid, 1% EDTA and 0.8 M (NH4)2HPO4 buffer (pH 7.2) in a reaction tube (10 m x 0.5 mm) at 0.9 mL min-1. Absorbance was measured at 425 nm. The calibration curve was rectilinear from 0.1 to 1 ppm B with coefficient of variation (n = 15) of 0.6% and 0.2% for 0.2 and 0.8 ppm B, respectively. The method was used for the determination of B in eye lotions.
Boron Spectrophotometry EDTA