All-in-One Flow Injection Spectrophotometric System for Field Testing

2018 ◽  
Vol 879 ◽  
pp. 206-211
Author(s):  
Sirirat Panich ◽  
Lerpong Pisnui
Keyword(s):  
Flow Injection ◽  
Field Testing ◽  
Light Emitting ◽  
Analytical Instruments ◽  
Portable Detection ◽  
Continuous Stream ◽  
Carrier Stream ◽  
Flow Through ◽  
Chemical Testing ◽  
Product Solution

To date one of the most significant innovative trends in chemical analysis is to develop analytical instruments that have processed to analyze on-site. Such an apparatus should minimize problems related to sample transports, sample handlings and sample storages. Currently, a traditional wet analysis in laboratories has been replaced with a portable device designed to minimize problems from sending samples to the lab. One of the practical chemical methods which can be developed as the mobile device is flow injection analysis (FIA) because the scaled-down FIA manifolds have been already presented. Regarding the detection, the rapid progress in material science and electronic technology consents the construction of portable detection devices, particularly light-emitting-diodes (LEDs) based-spectrometers. In this work, the FIA analyzer integrated with a built-in detector was designed for on-site chemical testing. A double syringes pump was assembled for transporting of the reagent carrier which were merged at the first mixing coil. A plug of a sample solution was inserted automatically by using a six-port-valve and was mixed with the carrier stream at the second mixing coil before directed to the detector. The heart of the developed analyzer is the built-in spectrophotometric sensor, made of the LEDs as a light source and a photodiode as a detector. The continuous stream of the final product was pushed into a quartz flow-through cuvette and then was exposed to the LED light. Finally, the absorbance of the product solution was calculated according to the Beer-Lambert law.

scholarly journals Flow-through Chemiluminescence Sensor Using Immobilized Oxidases for the Selective Determination of L-Glutamate in a Flow-Injection System.

2001 ◽  
Vol 17 (8) ◽  
pp. 929-933 ◽  
Author(s):  
Nobutoshi KIBA ◽  
Seiji ITO ◽  
Masaki TACHIBANA ◽  
Kazue TANI ◽  
Hitoshi KOIZUMI
Keyword(s):  
Flow Injection ◽  
Injection System ◽  
Selective Determination ◽  
Flow Injection System ◽  
Flow Through

Towards flow-through/flow injection electronic tongue for the analysis of pharmaceuticals

2015 ◽  
Vol 207 ◽  
pp. 1087-1094 ◽  
Author(s):  
Patrycja Ciosek ◽  
Małgorzata Wesoły ◽  
Marcin Zabadaj ◽  
Joanna Lisiecka ◽  
Krzysztof Sołłohub ◽  
...  
Keyword(s):  
Flow Injection ◽  
Electronic Tongue ◽  
Through Flow ◽  
Flow Through

scholarly journals Design and implementation of water purification system based on deep ultraviolet light emitting diodes and a multi-pass geometry reactor

2020 ◽  
Vol 18 (3) ◽  
pp. 306-313
Author(s):  
Pallabi Pramanik ◽  
Shaswati Das ◽  
Arghya Adhikary ◽  
Chirasree Roy Chaudhuri ◽  
Anirban Bhattacharyya
Keyword(s):  
Ultraviolet Light ◽  
Water Purification ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Water Purification System ◽  
Purification System ◽  
Flow Through ◽  
Deep Ultraviolet ◽  
Ultraviolet Light Emitting Diodes ◽  
Photon Recycling

Abstract A novel reactor was designed and implemented for water purification using deep ultraviolet light emitting diodes (LEDs). The focus was on minimizing the number of LEDs required for effective germicidal action. Simulation studies were carried out on the flow of water as well as the irradiance of UV. Variation was made in the beam divergence of the UV sources and reflectivity of optical coatings used for photon recycling. Based on optimized reactor designs, water purification was carried out both in the static and flow-through configuration. Water from various sources was spiked with a known bacterial strain, exposure studies were carried out and germicidal effect was determined. Our results indicate that under optimal design, a 3 mL volume of water shows a three order inactivation using a single UV-LED in a static reactor in 180 s. For a flow-through geometry, only three LEDs were used in the reactor implementation, and a multi-pass procedure was used to purify 150 mL of water from an Escherichia coli CFU count of 4.3 × 104/mL to 12/mL. While slow, this process requires less than 2 W, and can be powered from rechargeable sources. Faster processes can be implanted using multiple such reactor units in parallel, and can be optimized to the requirement and power levels.

scholarly journals Flow-injection spectrophotometric determination of dipyrone in pharmaceutical formulations using a solid-phase reactor with copper(II) phosphate

2013 ◽  
Vol 11 (11) ◽  
pp. 1830-1836 ◽  
Author(s):  
Viviane Bonifácio ◽  
Orlando Filho ◽  
Luiz Marcolino-Júnior
Keyword(s):  
Flow Injection ◽  
Solid Phase ◽  
Pharmaceutical Formulations ◽  
Calibration Graph ◽  
Deionized Water ◽  
Alizarin Red ◽  
Relative Standard ◽  
Solid Phase Reactor ◽  
Carrier Stream ◽  
Continuous Use

AbstractIn this work, a flow-injection spectrophotometric method for dipyrone determination in pharmaceutical formulations was developed. Dipyrone sample solutions were injected into a carrier stream of deionized water and the reaction was carried out in a solid-phase reactor (12 cm, 2.0 mm i.d.) packed with Cu3(PO4)2(s) entrapped in a matrix of polyester resin. The Cu(II) ions were released from the solid phase reactor by the formation of Cu(II)-(dipyrone)n complex. When the complex is released, it reacts with 0.02% m/v alizarin red S in deionized water to produce a Cu(VABO3)3 complex whose absorbance was monitored at 540 nm. The calibration graph was linear over the range 5.0×10−5–4.0×10−4 mol L−1 with a detection limit of 2.0×10−5 mol L−1 and relative standard deviation for 10 successive determinations of 1.5% (2.0×10−4 mol L−1 dipyrone solution). The calculated sample throughput was 60 h−1. The column was stable for at least 8 h of continuous use (500 injections) at 25°C. Pharmaceutical formulations were analyzed and the results from an official procedure measurement were compared with those from the proposed FIA method in order to validate the latter method.

Photometric flow-injection measurements with flow-cell employing light emitting diodes

1984 ◽  
Vol 83 (1-2) ◽  
pp. 17-25 ◽  
Author(s):  
M. Trojanowicz ◽  
W. Augustyniak ◽  
A. Hulanicki
Keyword(s):  
Flow Injection ◽  
Light Emitting Diodes ◽  
Flow Cell ◽  
Light Emitting
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