Stopped-flow kinetic determination of aluminum in Chinese tea leaves by fluoride ion-selective electrode potentiometry

• Published in: Talanta (Oxford) Vol. 43; no. 12; pp. 2067 - 2072
• Main Authors: Wang, Huaisheng, Zhang, Zihong, Sun, Ailing, Liu, Daojie, Liu, Renmin
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.12.1996; Oxford Elsevier
• Subjects: Aluminum determination; Analytical, structural and metabolic biochemistry; Biological and medical sciences; Fluoride ion-selective electrode; Fundamental and applied biological sciences. Psychology; Inorganic compounds; Kinetic potentiometric method; Microwave digestion; Other biological molecules; Tea leaf analysis; Aluminum determination; Microwave digestion; Kinetic potentiometric method; Tea leaf analysis; Fluoride ion-selective electrode; Tea; Stopped flow method; Chemical analysis; Sample preparation; Ion selective electrodes; Aluminum; China; Acid digestion; Microwave irradiation; Kinetic method; Potentiometry
• ISSN: 0039-9140; 1873-3573
• DOI: 10.1016/S0039-9140(96)01991-1

A stopped-flow kinetic potentiometric method for the determination of aluminum is described, based on monitoring the reaction between aluminum and fluoride at pH 3.0 using fluoride ion-selective electrode. The initial rate of the reaction is proportional to the concentration of aluminum present in the solution. The method is simple and rapid and has been applied to the determination of aluminum in Chinese tea leaves after microwave digestion.