Cost-effective flow injection analysis systems for acetic acid

Grudpan, Kate; Sritharathikhun, Piyanete; Jakmunee, Jaroon

doi:10.1002/1098-2728(2000)12:3<129::aid-lra2>3.0.co;2-p

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…Many methods have been linked to achieve greener coupling with, for examples, the flow injection analysis (FIA) titration method. [1][2][3] However, batch-wise titration has still been widely used in general, especially in remote areas, due to simplicity and cost-efficiency. Previously, some studies on micro-batchwise titration have been reported.…”

Section: Introductionmentioning

confidence: 99%

Towards Green Titration: Batchwise Titration with Reusable Solid Sorbed Indicators

et al. 2018

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We propose the creation of reusable indicator-sorbed-solids, using anion-exchange resins or kaolin as supports, with the aim to reduce chemical use towards green analytical chemistry. Indicators (phenolphthalein, thymol blue and butterfly pea flower extract as a natural indicator) sorbed on a solid support, were employed in acid-base titration, in both homogenous aqueous and heterogenous aqueous organic phases. Applications of the developed techniques to some real samples, such as vinegar, colored fruit juice and vegetable oil, have been demonstrated.

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Section: Introductionmentioning

confidence: 99%

Towards Green Titration: Batchwise Titration with Reusable Solid Sorbed Indicators

et al. 2018

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“…A laboratory-designed photometer using an LED red light source has been reported for phosphate measurements [9,15,16]. Fernandes and Reis [6] also proposed similar photo detectors for simultaneous measurement of ammonia and orthophosphate in natural waters.…”

Section: Introductionmentioning

confidence: 99%

Determination of trace amounts of phosphate by flow-injection photometry

Karthikeyan

Hashigaya

Kajiya

et al. 2004

Analytical and Bioanalytical Chemistry

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This paper describes a simple and rapid procedure for determination of traces of phosphate by means of molybdenum blue chemistry. The use of a cost-effective home-made flow cell with a long path length in combination with a light emitting diode (LED) and a photodiode (PD) is demonstrated as a simple absorbance detector for flow-injection analysis. In this method, a sample is injected into the carrier stream through an injection valve and mixed online with mixed reagent (a mixture of molybdate, bismuth, and ascorbic acid in sulfuric acid). The color intensity of the resulting association complex, molybdenum blue, is measured photometrically ( lambda(max) 875 nm). The proposed method can be used to detect phosphate in the range 0.02-4.0 mg x L(-1) and the precision of the proposed procedure is less than 5% at 0.1 mg x L(-1) phosphorus as phosphate. The method has been successfully applied to a variety of natural water samples.

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