Effectively simultaneous naked-eye detection of Cu(II), Pb(II), Al(III) and Fe(III) using cyanidin extracted from red cabbage as chelating agent
Type of Spiritual Experience
Cyanidin is a natural organic compound. It is a particular type of anthocyanidin (glycoside version called anthocyanins). It is a pigment found in many red berries including but not limited to grapes, bilberry, blackberry, blueberry, cherry, cranberry, elderberry, hawthorn, loganberry, açai berry and raspberry. It can also be found in other fruits such as apples and plums, and in red cabbage and red onion. It has a characteristic reddish-purple color, though this can change with pH; solutions of the compound are red at pH < 3, violet at pH 7-8, and blue at pH > 11. In certain fruits, the highest concentrations of cyanidin are found in the seeds and skin.
The paper simply proposes the colour be used as a test for metals, but the same chelating effect could be used to chelate soils and if the plants are healthy and ollutant free - to chelate us.
A description of the experience
Spectrochim Acta A Mol Biomol Spectrosc. 2014 May 21;126:98-104. doi: 10.1016/j.saa.2014.01.125. Epub 2014 Feb 15.
Effectively simultaneous naked-eye detection of Cu(II), Pb(II), Al(III) and Fe(III) using cyanidin extracted from red cabbage as chelating agent.
Khaodee W1, Aeungmaitrepirom W2, Tuntulani T1.
Simultaneous determination of Cu(II), Pb(II), Al(III) and Fe(III) using cyanidin as a chelating agent was investigated in terms of both quantitative and qualitative detections.
Cyanidin was extracted and purified from red cabbage which is a local plant in Thailand.
The selectivity of this method was examined by regulating the pH of cyanidin solution operated together with masking agents. It was found that Cu(II), Pb(II), Al(III) and Fe(III) simultaneously responded with the color change at pH 7, pH 6, pH 5 and pH 4, respectively. KF, DMG and the mixture of KF and DMG were used as masking agents for the determination of Fe(III), Al(III) and Pb(II), respectively. Results from naked-eye detection were evaluated by comparing with those of inductively coupled plasma (ICP), and there was no significant difference noticed.
Cyanidin using as a multianalyte reagent could be employed for simultaneous determination of Cu(II), Pb(II), Al(III) and Fe(III) at the lowest concentration at 50, 80, 50 and 200μM, respectively, by slightly varying pHs. Moreover, the proposed method could be potentially applied for real water samples with simplicity, rapidity, low cost and environmental safety.
Copyright © 2014 Elsevier B.V. All rights reserved.
Cyanidin; Metal detection; Naked-eye; Red cabbage; Water analysis
The source of the experiencePubMed
Concepts, symbols and science items
Activities and commonsteps
Onions and garlic