Fluorometric Determination of Zinc in Biologic Fluids

Abstract The 8-quinolinol complexes of zinc at pH 8.0 (in universal buffer) are stabilized by gum arabic and demonstrate a marked fluorescence at 517 mµ when excited at 375 mµ. Under these conditions only zinc—not magnesium or calcium at physiologic concentrations—can be determined in plasma and urine. Adult plasma has 94 ± 7 µg. zinc per 100 ml. while the plasma of children contains 108 ± 15g./100 ml.

Download Full-text

Fatigue and Stress Studies: An Improved Semi-automated Procedure for Fluorometric Determination of Plasma Catecholamines

PsycEXTRA Dataset ◽

10.1037/e735732011-001 ◽

1966 ◽

Author(s):

Vincent Fiorica

Keyword(s):

Plasma Catecholamines ◽

Fluorometric Determination ◽

Stress Studies

Download Full-text

Fluorometric determination of ascorbic acid in the absence of the oxidant in juices of common citrus

Planta Medica ◽

10.1055/s-0030-1264834 ◽

2010 ◽

Vol 76 (12) ◽

Author(s):

A Copra-Janicijevic ◽

E Sofic ◽

L Klepo ◽

A Topcagic ◽

I Tahirovic ◽

...

Keyword(s):

Ascorbic Acid ◽

Fluorometric Determination

Download Full-text

Fluorometric Determination of Tryptamine in Urine with the Zeiss Ultraviolet Spectrophotometer-Fluorometer

Scandinavian Journal of Clinical and Laboratory Investigation ◽

10.3109/00365516109137300 ◽

1961 ◽

Vol 13 (3) ◽

pp. 390-395 ◽

Cited By ~ 4

Author(s):

L. -G. Allgén ◽

K. E. Funke ◽

B. Nauckhoff

Keyword(s):

Fluorometric Determination ◽

Ultraviolet Spectrophotometer

Download Full-text

THE FLUOROMETRIC DETERMINATION OF MALIC ACID

Journal of Biological Chemistry ◽

10.1016/s0021-9258(19)51235-2 ◽

1949 ◽

Vol 180 (3) ◽

pp. 1225-1228

Author(s):

J.P. Hummel

Keyword(s):

Malic Acid ◽

Fluorometric Determination

Download Full-text

FLUOROMETRIC DETERMINATION OF KYNURENIC ACID AND XANTHURENIC ACID IN HUMAN URINE

Journal of Biological Chemistry ◽

10.1016/s0021-9258(18)70500-0 ◽

1958 ◽

Vol 230 (2) ◽

pp. 781-789 ◽

Cited By ~ 2

Author(s):

Kiyoo Satoh ◽

J.M. Price

Keyword(s):

Human Urine ◽

Kynurenic Acid ◽

Xanthurenic Acid ◽

Fluorometric Determination

Download Full-text

Sensitive Fluorometric Determination of Gold in Geological Samples using Fire Assay Pre- Concentration Coupled with Microfluidic Paper- Based Analytical Device

Microchemical Journal ◽

10.1016/j.microc.2021.105923 ◽

2021 ◽

pp. 105923

Author(s):

Akram Hajinia ◽

Tahereh Heidari

Keyword(s):

Geological Samples ◽

Fluorometric Determination ◽

Fire Assay ◽

Analytical Device

Download Full-text

Tyrosinase coupled with boron-doped carbon nanodots for fluorometric determination of dithiocarbamate fungicide ziram

Microchemical Journal ◽

10.1016/j.microc.2021.106241 ◽

2021 ◽

pp. 106241

Author(s):

Dongwei Wang ◽

Donghui Liu. Zhiqiang Zhou ◽

Peng Wang

Keyword(s):

Carbon Nanodots ◽

Fluorometric Determination ◽

Boron Doped

Download Full-text

Fluorometric Determination of Chlortetracycline in Mixed Feeds

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/47.2.203 ◽

1964 ◽

Vol 47 (2) ◽

pp. 203-208

Author(s):

Stanley E Katz ◽

Joseph Spock

Keyword(s):

Ion Exchange ◽

Exchange Resin ◽

Ammonium Hydroxide ◽

Solvent System ◽

Ion Exchange Resin ◽

Alkaline Degradation ◽

Fluorometric Determination ◽

Mixed Feeds ◽

Microbiological Assays

Abstract The fluorometric procedure for chlortetracycline in mixed feeds is based upon the degradation of chlortetracycline in alkaline solution to isochlortetracycline. The fluorescence of the isochlortetracycline is directly proportional to the concentration of chlortetracycline present prior to alkaline degradation. Chlortetracycline is extracted from mixed feeds with an acidmethanol solvent system, separated from the feed extract by adsorption on a Dowex 50 ion exchange resin, and eluted from the resin by ammonium hydroxide after conversion to isochlortetracycline. The isochlortetracycline is measured fluorometrically. Recoveries from known feeds are generally greater than 90% and agreements with microbiological assays are very close.

Download Full-text