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1963•Bulletin of the Chemical Society of JapanRequires access

The Spectrophotometric Determination of Aluminum with Xylenol Orange

Makoto Otomo

Open publisher page 25 citations

Abstract

Abstract Aluminum reacts with xylenol orange in a slightly acidic solution to form two red complexes which are in equilibrium with each other. At pH 3.4±0.1, Beer’s law is obeyed up to an aluminum concentration of 1.0 p.p.m. in 1 cm. absorption cells. The absorbance was measured at the isosbestic point of 536 mμ. The molar extinction coefficient was found to be 21100. This method seems to be the most favorable one for aluminum determination if the aluminum is first separated from any interfering ions. The composition of the complexes has also been discussed.

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Abstract Aluminum reacts with xylenol orange in a slightly acidic solution to form two red complexes which are in equilibrium with each other. At pH 3.4±0.1, Beer’s law is obeyed up to an aluminum concentration of 1.0 p.p.m. in 1 cm. absorption cells. The absorbance was measured at the isosbestic point of 536 mμ. The molar extinction coefficient was found to be 21100. This method seems to be the most favorable one for aluminum determination if the aluminum is first separated from any interfering ions. The composition of the complexes has also been discussed.

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Available abstract

Abstract Aluminum reacts with xylenol orange in a slightly acidic solution to form two red complexes which are in equilibrium with each other. At pH 3.4±0.1, Beer’s law is obeyed up to an aluminum concentration of 1.0 p.p.m. in 1 cm. absorption cells. The absorbance was measured at the isosbestic point of 536 mμ. The molar extinction coefficient was found to be 21100. This method seems to be the most favorable one for aluminum determination if the aluminum is first separated from any interfering ions. The composition of the complexes has also been discussed.

Key concepts: Chemistry, Xylenol orange, Orange (colour), Aluminium, Nuclear chemistry, Organic chemistry, Food science

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