scholarly journals Determination of Thiocyanate by Kinetic Spectrophotometric Flow Injection Analysis

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Mohsen Keyvanfard ◽  
Khadijeh Alizad ◽  
Parinaz Elahian
Keyword(s):  
Detection Limit ◽  
Hydrochloric Acid ◽  
Flow Injection ◽  
Flow Injection Analysis ◽  
Calibration Graph ◽  
Well Water ◽  
Janus Green ◽  
Rapid Flow ◽  
Kinetic Spectrophotometric

A simple and rapid flow injection spectrophotometric method has been developed for the determination of amount of thiocyanate in wastewaters and well water samples. It is based on the reaction of thiocyanate in hydrochloric acid with janus green and bromate. Reaction was monitored spectrophotometrically by measuring janus green absorbance atλmax=554 nm. The calibration graph was linear over the range 0.02–1.0 μg mL−1and the detection limit was 0.016μg mL−1(s/n=3). The throughput was 25 samples per hour.

scholarly journals Assessment of long distance chasing photometer (NAG-ADF-300-2) by estimating the drug atenolol with ammonium molybdate via continuous flow injection analysis

2020 ◽  
Vol 17 (1) ◽  
pp. 0078
Author(s):  
Elham N. Mezaal N. Mezaal
Keyword(s):  
Flow Injection ◽  
Flow Injection Analysis ◽  
Continuous Flow ◽  
Classical Method ◽  
Standard Addition ◽  
Calibration Graph ◽  
Ammonium Molybdate ◽  
Long Distance ◽  
Optimum Parameters

     Atenolol was used with ammonium molybdate to prove the efficiency, reliability and repeatability of the long distance chasing photometer (NAG-ADF-300-2) using continuous flow injection analysis. The method is based on reaction between atenolol and ammonium molybdate in an aqueous medium to obtain a dark brown precipitate. Optimum parameters was studied to increase the sensitivity for developed method. A linear range for calibration graph was 0.1-3.5 mmol/L for cell A and 0.3-3.5 mmol/L for cell B, and LOD 133.1680 ng/100 µL and 532.6720 ng/100 µL for cell A and cell B respectively with correlation coefficient (r) 0.9910 for cell A and 0.9901 for cell B, RSD% was lower than 1%, (n=8) for the determination of atenolol at concentration (0.5, 0.7 and 5) mmol/L respectively. The results were compared with classical method UV-Spectrophotometric at λ max=270 nm using the standard addition method via the use of t-test, at 95% confidence level. The comparison of data explain that long distance chasing photometer (NAG-ADF-300-2) is the choice with excellent extended detection and wide application.                                                                                                       

Competitive heterogeneous enzyme immunoassay for theophylline by flow-injection analysis with electrochemical detection of p-aminophenol

1990 ◽  
Vol 36 (4) ◽  
pp. 662-665 ◽  
Author(s):  
E P Gil ◽  
H T Tang ◽  
H B Halsall ◽  
W R Heineman ◽  
A S Misiego
Keyword(s):  
Alkaline Phosphatase ◽  
Detection Limit ◽  
Electrochemical Detection ◽  
Flow Injection ◽  
Flow Injection Analysis ◽  
General Procedure ◽  
Amperometric Detection ◽  
Enzyme Label ◽  
Commercial Kit

Abstract A competitive enzyme-linked immunoabsorbent assay based on the flow-injection amperometric detection of p-aminophenol has been investigated with use of the materials and general procedure of a commercial kit for the determination of theophylline in human serum. The antibody is immobilized on glass beads, and the enzyme label is alkaline phosphatase (EC 3.1.3.1). The high currents generated during the electrochemical detection allowed a rapid (35 min) and simple determination of theophylline throughout its therapeutic range (10-20 mg/L) and also in the subtherapeutic range (detection limit of about 80 micrograms/L).

scholarly journals Simultaneous Determination of Magnesium (Mg2+) and Ammonium (NH4+) by Flow Injection Analysis

2018 ◽  
Vol 19 (1) ◽  
pp. 1
Author(s):  
Mulik Kholifa ◽  
Tri Mulyono ◽  
Yeni Maulidah Muflihah
Keyword(s):  
Detection Limit ◽  
Simultaneous Determination ◽  
Flow Injection ◽  
Flow Injection Analysis ◽  
Limit Of Detection ◽  
Detection Sensitivity ◽  
Magnesium Ions ◽  
Ammonium Ions ◽  
Percent Recovery

An automatic method for the simultaneous determination of magnesium and ammoniun by flow injection analysis is described. This analysis used two detectors, potentiometry and spectrophotometry, for the determination of magnesium and ammonium simultaneously. Potentiometric detectors are used to detect ammonium ions, whereas spectrophotometer detectors are used to detect the presence of magnesium ions. The performance of the FIA system includes linear range linearity, limit of detection, sensitivity, reproducibility and recovery test. Spectrophotometry FIA showed good performance with several criteria of linearity with regression value of 0.9918, the detection limit of 0.06 ppm, a sensitivity of 0.0115, repeatability of less than 2% and the percent recovery of 91,6%. While potentiometric FIA showed th performance with several criteria of linearity with regression value of 0.9896, the detection limit of 0.17 ppm, a sensitivity of 40.747 mV per decade of concentration, repeatability of less than 2% and the percent recovery of 89,7%. Keywords: Flow Injection Analysis, spectrophotometry, potensiometry, simultaneous

scholarly journals Adaptation of a cold vapour mercury analyser to flow injection analysis

1988 ◽  
Vol 10 (4) ◽  
pp. 188-191 ◽  
Author(s):  
Celio Pasquini ◽  
Wilson F. Jardim ◽  
Lourival C. de Faria
Keyword(s):  
Detection Limit ◽  
Flow Injection ◽  
Flow Injection Analysis ◽  
Digestion Procedure ◽  
Cold Vapour

Minor modifications to a Coleman MAS-50A Mercury Analyser System allowed the determination of mercury by flow injection analysis. Using sample volumes of 600 μl it was possible to analyse up to 120 samples per hour, with a detection limit of 0.2 μg. l-1(120 pg) of mercury. The authors also report on a simple digestion procedure which replaces the time- and reagent-consuming EPA procedure, when the sample content permits.

scholarly journals Determination of Manganese in Feedstuffs by Flow Injection Spectrophotometry Based on Rapid Formation of Permanganate at Room Temperature

2001 ◽  
Vol 84 (4) ◽  
pp. 1011-1016 ◽  
Author(s):  
Jing-Fu Liu ◽  
Ying-Di Feng ◽  
Gui-Bin Jiang
Keyword(s):  
Standard Deviation ◽  
Detection Limit ◽  
Flow Injection ◽  
Room Temperature ◽  
Sampling Rate ◽  
Relative Standard ◽  
Rapid Flow ◽  
Rapid Formation ◽  
Optimized Conditions

Abstract A simple and rapid flow injection spectrophotometric procedure was developed for determination of manganese. In the presence of pyrophosphate and acetate, manganese was immediately oxidized to permanganate by periodate at room temperature in slightly alkaline medium. Under optimized conditions, the determination was made with a sampling rate of 120/h, a linear range of 0–30 mg/L Mn(II), a detection limit (S/N = 3) of 0.08 mg/L, and a relative standard deviation of 0.6% (n = 11) at 10 mg/L Mn(II). The proposed method was used to determine manganese in trace mineral premixes and feedstuffs. Results agreed well with those obtained by the standard atomic absorption spectroscopy method.

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