scholarly journals Determination of Copper, Magnesium, Zinc, Cadmium, Aluminium, Bismuth, Iron, Manganese, Nickel, Cobalt, Titanium, Uranium, Thorium, Lead ahd Calcium by Means of So-called Oxine Method. (Studies on Gravimetric Analysis by Means of the Thermobalance. XV.)

1932 ◽  
Vol 53 (6) ◽  
pp. 566-573
Author(s):  
Saburo ISHIMARU
Keyword(s):  
Gravimetric Analysis ◽  
Nickel Cobalt ◽  
Zinc Cadmium ◽  
Iron Manganese ◽  
Determination Of Copper

scholarly journals A Double-Line Sequential Injection System for the Spectrophotometric Determination of Copper, Iron, Manganese, and Zinc in Waters

2005 ◽  
Vol 88 (2) ◽  
pp. 639-644 ◽  
Author(s):  
Inês P A Morais ◽  
M Renata S Souto ◽  
António O S S Rangel
Keyword(s):  
Metal Ions ◽  
Spectrophotometric Determination ◽  
Absorption Spectrometry ◽  
Injection System ◽  
Sequential Injection ◽  
Double Line ◽  
Relative Standard ◽  
Iron Manganese ◽  
Determination Of Copper

Abstract A double-line sequential injection system was developed for the spectrophotometric determination of several metal ions in waters. The proposed double-line configuration was used to enable adding sample and chromogenic reagents as merging zones. The methodology was applied to the spectrophotometric determination of copper, iron, manganese, and zinc in samples of diverse origins at the range of 0.15–5.00, 0.10–10.0, 0.48–4.00, and 0.11–5.00 mg/L, respectively. Different chromogenic reagents and detection wavelengths were used. The chromogenic reagents for iron and manganese were 1,10-phenanthroline and formaldoxime, respectively. Copper and zinc were both determined using the analytical reagent zincon. Analytical characteristics of the methodology, such as manifold parameters, buffer pH, and reagent concentrations were optimized, and interference of some of the metal ions commonly present in water sample was assessed. Results of the analysis were in agreement with those obtained by atomic absorption spectrometry. Repeatability, expressed as the relative standard deviation for 10 consecutive injections of water samples, was lower than 6%. The determination rate was approximately 36/h.

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.

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