Fully automated photometric titration procedure employing a multicommuted flow analysis setup for acidity determination in fruit juice, vinegar, and wine

2017 ◽  
Vol 135 ◽  
pp. 207-212 ◽  
Author(s):  
Manoel J.A. Lima ◽  
Boaventura F. Reis
Keyword(s):  
Fruit Juice ◽  
Flow Analysis ◽  
Titration Procedure ◽  
Photometric Titration

scholarly journals A Simple and Rapid Spectrophotometric Method for Determination of Thiophanate-Methyl in Commercial Formulations and Its Residues in Foodstuffs

2004 ◽  
Vol 87 (4) ◽  
pp. 811-814 ◽  
Author(s):  
Balbir C Verma ◽  
Sumita Sood ◽  
Chetan Chauhan ◽  
Devender K Sharma
Keyword(s):  
Spectrophotometric Method ◽  
Thiophanate Methyl ◽  
Green Color ◽  
Yellowish Green ◽  
Titration Procedure ◽  
Maximum Absorbance ◽  
Photometric Titration ◽  
Formulation Analysis ◽  
Sensitive Spectrophotometric Method

Abstract A new, simple, rapid, and sensitive spectrophotometric method for the determination of thiophanate-methyl, based on its reaction with cobalt(II) in the presence of triethylamine, has been developed. The yellowish green color that develops instantaneously on mixing the fungicide with the reagents in dimethylformamide is stable for at least 2 h and has maximum absorbance at 360 nm. The method has been successfully applied to the determination of thiophanate-methyl in its commercial formulations and residues on grains and apples. A photometric titration procedure for formulation analysis of the fungicide has also been developed.

scholarly journals Instrumentation and Automated Photometric Titration Procedure for Total Acidity Determination in Red Wine Employing a Multicommuted Flow System

2006 ◽  
Vol 2006 ◽  
pp. 1-8 ◽  
Author(s):  
Ausberta Jesus Cabezas Garcia ◽  
Boaventura F. Reis
Keyword(s):  
Red Wine ◽  
Flow System ◽  
Reference Method ◽  
Total Acidity ◽  
Real Time Processing ◽  
Photometric Detection ◽  
Titration Procedure ◽  
Relative Standard ◽  
Significant Difference ◽  
Photometric Titration

An automated procedure for photometric titration of red wine and associated instrumentation is described. The procedure was based on the flow-batch approach implemented employing multicommutation. The photometric detection was carried out using a homemade LED-based photometer. The mixing device, LED, and photodetector were attached to the titration chamber in order to form a compact and small-sized unit. The flow system comprised an automatic injector and three-way solenoid valves, which were controlled by a microcomputer through an electronic interface card. The software, written in Quick BASIC 4.5, was designed with abilities to accomplish all steps of the titration procedure including data acquisition and real-time processing to decide about the course of titration in the following step and so forth, until the titration endpoint was reached. The usefulness of the proposed titration system was demonstrated by analyzing red wine samples. When results were compared with those obtained using the AOAC reference method, no significant difference was observed at the95%confidence level. A relative standard deviation of ca 2%(n=9) was obtained when processing a typical red wine sample containing 7.3gl-1total acidity expressed as tartaric acid.

Production flow analysis

1963 ◽  
Vol 42 (12) ◽  
pp. 742 ◽  
Author(s):  
John L. Burbidge
Keyword(s):  
Flow Analysis ◽  
Production Flow
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