Determination of Aluminum Ion with Morin in a Medium Comprised by Ionic Liquid–Water Mixtures

Abstract

In this study we have employed two ionic liquids (ILs) as a new media for the analysis of aluminum in aqueous solutions by spectrofluorimetric method. ILs are liquid salts and they have no measurable vapor pressure up to their thermal decomposition point, >300 °C. This lack of vapor pressure makes these materials highly attractive for many studies as they can be used as clean solvents. Besides they are promising environments for analysis purposes and optical sensor designs. The results revealed that absorption, excitation and emission spectra of the morin-Al complex exhibited considerable changes in moieties. The morin-Al complex was stable at aluminum concentrations below 9.1 mg L(-1) in 25% 1-butyl-3-methylimidazolium bromide (IL-I)-water binary mixtures. The higher concentrations of IL (>25% by volume) was not suitable for the complex formation thus in pure IL media the complex formation even at high aluminum concentrations was not observed. The complex stoichiometry ratio of aluminum:morin was 2:1 in IL-I-water binary mixtures. The linear concentration range was 0.045-7.2 mg L(-1) with a correlation coefficient of r = 0.9909. The detection limit was found to be 0.036 mg L(-1). Cu(2+), Mn(2+) and PO (4) (3-) ions exhibited less interfering effect in presence of IL-I and the tolerance limit of Cu enhanced 10 times when compared with ethanol.

Suppression of interfering ions by using ionic liquid and micelle moieties in spectrofluorimetric analysis of manganese

“…17 There are also some studies indicating that ILs may constitute a new class of surfactants with special properties resulting in considerable enhancements in analytical response. 18,19 In recent years, it has also been shown that ILs supplied a stable and sensitive environment in some analytical applications. 20−22 There are increasing numbers of studies on the preconcentration or selective extraction of metal ions using ILs.…”

Supramolecular solvent based liquid–liquid microextraction of aluminum from water and hair samples prior to UV-visible spectrophotometric detection

“…[6][7][8] Due to both negative and positive aspects of aluminum, it is very important to develop analytical methods for the determination of aluminum at trace levels both in environmental and biological samples. 9,10 Analytical methods which are widely used for the determination of aluminum are chemiluminescence analysis, 11 electrothermal atomic absorption spectrometry (ETAAS), 12 inductively coupled plasma optical emission spectrometry (ICP-OES), 13 electroanalytical techniques 14 and high performance liquid chromatography (HPLC). 15 However, due to a lack of selectivity and sensitivity and interference effects of the matrix, the direct determination of Al(III) using these methods are not possible.…”

A new fluorescent probe for Al3+based on rhodamine 6G and its application to bioimaging

“…Recently, considerable attention has been focused on the development of selective and sensitive optical sensors that can detect biologically important ions by color and fluorescence responses. [26][27][28][29] Several fluorescent probes based on naphthalene, [30][31][32][33][34][35] tetrazole, 36 morin, 37,38 8-hydroxyquinoline, [39][40][41] coumarin 19,42,43 BODIPY 44 and Schiff base 45 have been designed and synthesized for determination of Al 3+ . Recently, rhodamine derivatives have been proven to be an ideal model to construct fluorescent probes because they possess excellent spectroscopic properties such as high fluorescence quantum yield, visible light excitation as well as long wavelength emission.…”