Chromium Monitoring in Water by Colorimetry Using Optimised 1,5-Diphenylcarbazide Method

Annija Lace, David Ryan, Mark Bowkett and John Cleary
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Annija Lace: EnviroCORE, Department of Science and Health, Institute of Technology Carlow, Kilkenny Road, Co. Carlow R93 V960, Ireland
David Ryan: EnviroCORE, Department of Science and Health, Institute of Technology Carlow, Kilkenny Road, Co. Carlow R93 V960, Ireland
Mark Bowkett: TE Laboratories Ltd. (TelLab), Loughmartin Business Park, Tullow, Co. Carlow R93 N529, Ireland
John Cleary: EnviroCORE, Department of Science and Health, Institute of Technology Carlow, Kilkenny Road, Co. Carlow R93 V960, Ireland

IJERPH, 2019, vol. 16, issue 10, 1-15

Abstract: Chromium contamination of drinking water has become a global problem due to its extensive use in industry. The most commonly used methods for chromium detection in water are laboratory-based methods, such as atomic absorption spectroscopy and mass spectroscopy. Although these methods are highly selective and sensitive, they require expensive maintenance and highly trained staff. Therefore, there is a growing demand for cost effective and portable detection methods that would meet the demand for mass monitoring. Microfluidic detection systems based on optical detection have great potential for onsite monitoring applications. Furthermore, their small size enables rapid sample throughput and minimises both reagent consumption and waste generation. In contrast to standard laboratory methods, there is also no requirement for sample transport and storage. The aim of this study is to optimise a colorimetric method based on 1,5-diphenylcarbazide dye for incorporation into a microfluidic detection system. Rapid colour development was observed after the addition of the dye and samples were measured at 543 nm. Beer’s law was obeyed in the range between 0.03–3 mg·L −1 . The detection limit and quantitation limit were found to be 0.023 and 0.076 mg·L −1 , respectively.

Keywords: chromium; colorimetric methods; environmental monitoring; 1,5-diphenylcarbazide; microfluidics (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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