A compact multi-parameter detection system based on hydrodynamic sequential injection for sensitive determination of phosphate, nitrite, and nitrate in water samples

2020 ◽  
Vol 12 (6) ◽  
pp. 855-864 ◽  
Author(s):  
Wanpen Khongpet ◽  
Pattama Yanu ◽  
Somkid Pencharee ◽  
Chanida Puangpila ◽  
Supaporn Kradtap Hartwell ◽  
...  
Keyword(s):  
Performance Improvement ◽  
Water Samples ◽  
Detection System ◽  
Colorimetric Detection ◽  
Injection System ◽  
Sequential Injection ◽  
Molybdenum Blue ◽  
Sensitive Determination

A miniaturized microfluidic hydrodynamic sequential injection system for sensitive colorimetric detection was developed for performance improvement in the measurement of phosphate, nitrite, and nitrate based on molybdenum blue and Griess methods.

scholarly journals Electrochemical Flow-ELISA for Rapid and Sensitive Determination of Microcystin-LR Using Automated Sequential Injection System

Sensors ◽  
2017 ◽  
Vol 17 (7) ◽  
pp. 1639 ◽  
Author(s):  
Lesedi Lebogang ◽  
Jongjit Jantra ◽  
Martin Hedström ◽  
Bo Mattiasson
Keyword(s):  
Injection System ◽  
Sequential Injection ◽  
Sensitive Determination

scholarly journals Sequential-Injection Procedure for Determination of Iodide in Pharmaceutical and Drinking Water Samples by Catalytic Reaction with Spectrophotometric Detection

2001 ◽  
Vol 84 (2) ◽  
pp. 337-341 ◽  
Author(s):  
José Antonio Erustes ◽  
Rarel Forteza ◽  
Victor Cerdà
Keyword(s):  
Drinking Water ◽  
Water Samples ◽  
Catalytic Effect ◽  
Kinetic Method ◽  
Injection System ◽  
Sequential Injection ◽  
Spectrophotometric Detection ◽  
Low Concentrations ◽  
Drinking Water Samples

Abstract A novel sequential-injection system was developed for determination of iodide at very low concentrations by using a kinetic method. The method is based on the catalytic effect of iodide on the redox reaction between Ce4+ and As3+ first described by Sandell and Kolthoff. The calibration curve is constructed by measuring the decrease of Ce4+ absorbance versus iodide concentration with a delay time of 30 s. The detection limit is 1.5 μg/L, the working temperature is 45°C, and the working range is 0.002–0.5 mg/L. Reasonable agreement was obtained when the method was applied to pharmaceutical and drinking water samples. The method has a sample throughput of approximately 15/h.

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