Direct and Selective Flow-Injection Method for the Simultaneous Spectrophotometric Determination of Calcium and Magnesium in Red and White Wines Using Online Dilution Based on “Zone Sampling”

2001 ◽  
Vol 49 (11) ◽  
pp. 5152-5155 ◽  
Author(s):  
Demetrius G. Themelis ◽  
Paraskevas D. Tzanavaras ◽  
Anastasios V. Trellopoulos ◽  
Michael C. Sofoniou
Keyword(s):  
Spectrophotometric Determination ◽  
Flow Injection ◽  
White Wines ◽  
Injection Method ◽  
Calcium And Magnesium ◽  
Zone Sampling

scholarly journals Spectrophotometric determination of peroxydisulphate with o-dianisidine by flow injection

1990 ◽  
Vol 68 (10) ◽  
pp. 1750-1756 ◽  
Author(s):  
Paul M. Shiundu ◽  
Adrian P. Wade ◽  
S. B. Jonnalagadda
Keyword(s):  
Spectrophotometric Determination ◽  
Flow Injection ◽  
Spectrophotometric Method ◽  
Ion Concentration ◽  
Injection Method ◽  
Absorbance Maximum ◽  
Accurate Knowledge ◽  
Stable Product

Precise and accurate knowledge of peroxydisulfate ion concentration is critical in industrial polymer production, where it is extensively used as an activator. Its ability to oxidize in either acidic, neutral, or alkali media also makes it widely applicable in many other areas of chemistry.In this paper we present an optimized spectrophotometric flow injection method for determination of peroxydisulfate. The analyte oxidizes o-dianisidine to form a stable product which has a convenient absorbance maximum at 450 nm. This provides a simple and sensitive alternative to present methods which are more costly, tedious, or complex. Keywords: spectrophotometric method, peroxydisulphate.

Simple flow injection method for simultaneous spectrophotometric determination of Fe(II) and Fe(III)

2011 ◽  
Vol 702 (2) ◽  
pp. 213-217 ◽  
Author(s):  
J. Kozak ◽  
N. Jodłowska ◽  
M. Kozak ◽  
P. Kościelniak
Keyword(s):  
Spectrophotometric Determination ◽  
Flow Injection ◽  
Injection Method ◽  
Simple Flow
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