Synthesis of bidentate pyridylazo and thiazoylazo reagents and the spectrophotometric determination of copper in a flow-injection system

1986 ◽  
Vol 181 ◽  
pp. 298
Author(s):  
K. Oshita ◽  
H. Wada ◽  
G. Nakagawa
Keyword(s):  
Spectrophotometric Determination ◽  
Flow Injection ◽  
Injection System ◽  
Flow Injection System ◽  
Determination Of Copper

Spectrophotometric determination of phosphite in fertilizers in a flow injection system with online sample preparation

2000 ◽  
Vol 12 (6) ◽  
pp. 286-290 ◽  
Author(s):  
Jos� Anchieta Gomes Neto ◽  
Helenice Akemi Ito ◽  
Kelly das Gra�as Fernandes ◽  
Mercedes de Moraes ◽  
Arnaldo Alves Cardoso
Keyword(s):  
Sample Preparation ◽  
Spectrophotometric Determination ◽  
Flow Injection ◽  
Injection System ◽  
Flow Injection System

Spectrophotometric determination of pKa values based on a pH gradient flow-injection system

2000 ◽  
Vol 408 (1-2) ◽  
pp. 135-143 ◽  
Author(s):  
Javier Saurina ◽  
Santiago Hernández-Cassou ◽  
Romà Tauler ◽  
Anna Izquierdo-Ridorsa
Keyword(s):  
Spectrophotometric Determination ◽  
Flow Injection ◽  
Gradient Flow ◽  
Ph Gradient ◽  
Injection System ◽  
Pka Values ◽  
Flow Injection System

scholarly journals Flow Injection Spectrophotometric Determination of Copper, Iron, Manganese, and Zinc in Animal Feeds Using a Common Manifold

2000 ◽  
Vol 83 (6) ◽  
pp. 1293-1298 ◽  
Author(s):  
Jing-Fu Liu ◽  
Gui-Bin Jiang ◽  
Ying-Di Feng
Keyword(s):  
Flow Injection ◽  
Simple Procedure ◽  
Xylenol Orange ◽  
Low Cost ◽  
Injection System ◽  
Animal Feeds ◽  
Flow Injection System ◽  
Iron Manganese ◽  
Determination Of Copper

Abstract A rapid and simple procedure was developed for the determination of copper, iron, manganese, and zinc in animal feeds using an identical flow injection spectrophotometric manifold but different chromogenic reagents and different detection wavelengths. Bis(cyclohexanone)oxalydihydrazone, formaldoxime, 1,10-phenanthroline, and xylenol orange were adopted as chromogenic reagents for Cu, Mn, Fe, and Zn, respectively. Detection conditions such as manifold parameters, buffer pH, reagent concentration, temperature, and acidity of sample solution were optimized. Analytical characteristics of the method and interference of metal ions commonly present in feeds were studied. By changing the reagents and detection wavelengths, which can be done quickly, the proposed low cost flow injection system can determine Cu, Fe, Mn, or Zn in the range of 0.5–10 mg/L with a sampling throughput of 120/h.

scholarly journals Spectrophotometric determination of phosphorus in iron alloys employing a flow injection system

2001 ◽  
Vol 12 (1) ◽  
pp. 81-86 ◽  
Author(s):  
Ana P. G. Gervasio ◽  
Carlos E. S. Miranda ◽  
Gilmara C. Luca ◽  
Cristiane A. Tumang ◽  
Luis F. P. Campos ◽  
...  
Keyword(s):  
Spectrophotometric Determination ◽  
Flow Injection ◽  
Iron Alloys ◽  
Injection System ◽  
Flow Injection System
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