University of North Florida
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Contact Info

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

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Jing Fan

Abbrev:
Fan, J.
Other Names:
Address:
Department of Chemistry, Henan Normal University, Xinxiang, Henan 453002, China
Phone:
Fax:
+86-373-3383145

Citations 2

"Flow Injection Kinetic Spectrophotometric Determination Of Ascorbic Acid Based On An Inhibiting Effect"
Talanta 1999 Volume 50, Issue 4 Pages 893-898
Jing Fan, Cunling Ye, Suling Feng, Guien Zhang and Jianji Wang

Abstract: A rapid and sensitive flow injection kinetic spectrophotometric method is proposed for the determination of ascorbic acid. The procedure is based on the inhibiting effect of ascorbic acid on the enhancing effect of oxalate on the potassium dichromate-potassium iodide/rhodamine 6G system. The detection limit and linear ranges are 0.08 and 0.10-4.00 µg/ml, respectively. The relative standard deviation of 11 replicate measurements is less than 2.0%. This method has been successfully used to determine ascorbic acid in pharmaceuticals, tomatoes and oranges.
Ascorbic acid

"Determination Of Total Phenols Using On-line Separation Flow Injection-Spectrophotometry"
Fenxi Huaxue 2003 Volume 31, Issue 10 Pages 1199-1201
Fan Jing, Feng Suling, Lu Huixiong, Ye Cunling

Abstract: A new procedure for the on-line separation, pre-concentration and determination of phenols in industrial waste water has been established by flow injection technique it was based on the coupling reaction of phenols with diazotisation products between sulfanilic acid and sodium nitrite in hydrochloric acid medium. The experimental conditions were optimized by using the controlled and weighted centroid simplex method. Linear range of the determination is 0.1 - 20 mg/L, the sampling frequency is 36 samples per hour and the detection limit is 0.02 mg/L. The proposed method has been applied for the determination of trace phenols in industrial waste water, and compared well with 4-aminoantipyrine method.