Determination of Trace Amounts of Chromium(III) in Water Samples Using Online Flow Injection Catalytic Spectrophotometry

2017 ◽  
Vol 83 (6) ◽  
pp. 1084-1088 ◽  
Author(s):  
Z. X. Zhao ◽  
X. S. Zhang
Keyword(s):  
Flow Injection ◽  
Water Samples ◽  
Catalytic Spectrophotometry

A method of high sensitivity and in situ determination of trace cobalt(II) in water samples with salicyl fluorone

2014 ◽  
Vol 70 (7) ◽  
pp. 1182-1187 ◽  
Author(s):  
Zhe Chen ◽  
Hua Li
Keyword(s):  
Flow Injection ◽  
Water Samples ◽  
High Sensitivity ◽  
Basic Solution ◽  
Optimum Conditions ◽  
Cetylpyridinium Bromide ◽  
Test Conditions ◽  
Relative Standard

Based on the sensitive reaction of Co(II) and salicyl fluorone with the presence of cetylpyridinium bromide in basic solution, a new method of flow injection micelle-solubilized spectrophotometry was developed for the determination of cobalt. The reaction was monitored for the absorbance of Co(II) at 540 nm. The reagents, flow injection variables and effects of foreign ions were investigated and the optimum conditions were established. At the optimum test conditions, the developed method provides a linearity range of 3–40 μg L−1 with a detection limit of 0.1 μg L−1 at about 60 h−1 sampling frequency. Relative standard deviation of 0.91, 0.95 and 0.89% were obtained for the determination of 3, 15 and 30 μg L−1 Co(II) solution. The proposed method has been successfully applied for analysis of trace amounts of cobalt in water samples.

A multisyringe flow injection method for the determination of thorium in water samples using spectrophotometric detection

2011 ◽  
Vol 289 (1) ◽  
pp. 67-73 ◽  
Author(s):  
Jorge L. Guzmán-Mar ◽  
Aracely Hernández-Ramírez ◽  
Ulrico J. López-Chuken ◽  
Pedro L. López-de-Alba ◽  
Víctor Cerdà
Keyword(s):  
Flow Injection ◽  
Water Samples ◽  
Spectrophotometric Detection ◽  
Injection Method
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