Spectrofluorometric method for determination of the total mercury content in environmental samples — Waste waters

Balint, L.; Vedrina‐Dragojević, Irena; Šebečić, Blaženka; Momirovic-Culjat, J.; Horvatić, Marija

doi:10.1007/bf01243165

Cited by 13 publications

(6 citation statements)

References 22 publications

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“…Rhodamine B (RhB) belongs to the group of xanthene dyes that are commonly used in FRET systems as the excited state energy acceptor because of its many advantages, such as good solubility, excellent photostability, high extinction coefficient and high uorescence quantum yields. 26,27 It had been utilized in FRET systems to detect DNA, metal ions, small molecules, and other analytes. 4,5,28,29 In the present work, the FRET effect between CQDs and RhB was observed and used for a uorescence probe to detect Fe 3+ ions.…”

Section: Introductionmentioning

confidence: 99%

Enhanced performance of Fe³⁺ detection via fluorescence resonance energy transfer between carbon quantum dots and Rhodamine B

Zhao

Chang

et al. 2014

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Enhanced performance of Fe³⁺ detection via fluorescence resonance energy transfer between carbon quantum dots and Rhodamine B

Zhao

Chang

et al. 2014

RSC Adv.

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“…The relative standard deviation was 1.63%, obtained from a series of 11 standards, each containing 10 µg L -1 of mercury. According to the reported literature, a notorious number of fluorometric methods are based on the quenching effect of Hg(II) on the fluorescence of a reagent, such as rhodamine B, 28 bathophenanthrolinedisulfonate, 24 meso-tetrakis(4-trimethylammoniumphenyl)porphyrin 26 or binaphthyl-based amphiphiles. 9 Mercury methods based on increasing fluorescence intensity measurements are based on one of the following approaches: the effect of the Hg(II) on the oxidation of a reagent to yield a fluorescent derivative, 6,13 the formation of ion-association complex with a fluorescent reagent and extraction to an organic phase, 2,15,16 and the selective formation of a fluorescent complex of mercury.…”

Section: Analytical Characteristicsmentioning

confidence: 99%

“…By using the cold vapor technique after atomizing Hg(II) at room temperature with SnCl2, this is the most widely used method for the determination of mercury at low concentrations. 28,29 In this paper, based on this method, 28,29 we made some improvements: 10 ml of 10% SnCl2 and 5 ml of a 1:1 sulfuric acid solutions were added to the sample solution in the distillation flask (200 cm 3 ). Then, 0.1 ml of potassium permanganate (2 × 10 -2 mol L -1 ) and 0.5 ml of sulfuric acid solutions (1.0 mol L -1 ) were taken into the receiver.…”

Section: Separation Of Mercury By Distillationmentioning

confidence: 99%

Highly Sensitive Spectrofluorometric Determination of Trace Amounts of Mercury with a New Fluorescent Reagent, 2-Hydroxy-1-naphthaldehydene-8-aminoquinoline

Jiang

2006

ANAL. SCI.

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The principalship of chemical analysis, especially in environmental sciences, is the determination and quantification of harmful substances. The determination of mercury in this type of sample is one of the problems, but, as already acknowledged, is a very important one. Firstly, there is the inherent toxicity of the element at low concentrations (water with a content of over 1 µg L -1 is considered to be contaminated). Secondly, there is the ease with which mercury is biologically transformed into alkyl-mercury compounds, which are longer lasting and more dangerous toxins, 1,2 which can result in death or severe damage to the brain. 3 In recent years, due to its involvement in poisoning incidents, its use in industry has somewhat declined. Despite this, it is still widely used, and is the most ubiquitous of all heavy metals, because it is the only metal that can exist as a liquid and as a volatile form at ambient temperature. It is thus necessary to monitor the mercury levels in products for human consumption and environmental samples.Molecular fluorescence is attracting a great deal of interest in environmental monitoring, since it is inherently more sensitive than spectrophotometry, 31 and thus it can be used for the analysis of very low trace concentrations. As far as mercury is concerned, only a few methods have been described so far for its fluorometric determination. [5][6][7][8][9][10][11][12][13][14] Moreover, the majority of these methods present problems of sensitivity, selectivity, reaction time or procedure complexity. In addition, mercury methods based on increasing fluorescence intensity measurements are scarce, of course, which is the more selective one. 2,4,6,7,10,12,15,16 Previously, several hydrazones, of which salicylaldehyde and 2-hydroxy-1-naphthaldehydene were parent substances, were synthesized in our laboratory. They were used as spectrofluorometric reagents for the determination of aluminum, 17,18 strontium, 19 copper, 20 molybdenum, 21 lead 22 and chromium. 23 In order to increase the degree of molecular conjugation and the coplanar effect of a particular complex, it is necessary to design the molecular structure. In the present work, a new fluorescent reagent, 2-hydroxy-1-naphthaldehydene-8-aminoquinoline (HNAAQ), was synthesized, and its complex with mercury was studied. The fluorescent intensity of the complex was obviously increased by a coplanar effect, and the degree of molecular conjugation, owing to the presence of a naphthalene ring and a quinoline ring at both ends of the reagent's structure. Moreover, according to the Lewis "Hard and Soft Acids and Bases Rules", Hg 2+ is a soft acid and -N=CH-and the pyridine ring are borderline bases. It is therefore very possible and easy that Hg 2+ and N of "-N=CH-" and N of the pyridine ring can be complexed with each other. They formed a steady structure, probably as follows:Based on this complexation, a new spectrofluorometric method with high sensitivity was developed for the determination of mercury. After a concentration step for th...

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“…[5][6][7] Due to its interesting physical and chemical properties mercury has been used in various industrial sectors like catalysis, amalgams, electrodes, lamps, batteries, thermometers, fungicides and pigments. 8 Other sources of mercury include coal mining, gold production, non-ferrous metal production, cement production, waste disposal, human crematoria, caustic soda production, pig iron and steel production. 8 Industrial processes tend to release geologically bound mercury from mercury reservoirs into the atmosphere as elemental mercury.…”

Section: Introductionmentioning

confidence: 99%

“…8 Other sources of mercury include coal mining, gold production, non-ferrous metal production, cement production, waste disposal, human crematoria, caustic soda production, pig iron and steel production. 8 Industrial processes tend to release geologically bound mercury from mercury reservoirs into the atmosphere as elemental mercury. 9 Once introduced into the environment this ion takes part in many transformations, transportation and bioassimilation processes.…”

Section: Introductionmentioning

confidence: 99%

Micellar mediated trace level mercury quantification through the rhodamine B hydrazide spirolactam ring opening process

Malingappa

Kumar

2011

Anal. Methods

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The micellar mediated trace level estimation of mercury in industrial effluent sample by the rhodamine B hydrazide spirolactam ring opening process is described. The catalytic reaction of mercuric ion with colorless rhodamine B hydrazide to form pink colored rhodamine B through amide bond cleavage at pH 5 forms the basis of this reaction. The dye obtained was extracted from the aqueous phase into nonionic surfactant using Triton X-114 through cloud point formation and its absorbance was measured at 556 nm. The reaction conditions such as concentrations of rhodamine B hydrazide and Triton X-114, effect of NaCl concentration on cloud point temperature and the efficiency of extraction were optimized. The selectivity of the method towards mercury in the presence of various ions was studied. The validity of the method was examined by spiking real samples with known amounts of mercury and carrying out recovery studies. The results obtained by the proposed method were compared with the standard dithiazone method. The preconcentration and enrichment factors were found to be 5 and 12 respectively. The limit of detection and the linear range were found to be 1.4 ng ml À1 and 10-100 ng ml À1respectively. The relative standard deviation was found to be 0.35% at 20 ng ml À1.

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Spectrofluorometric method for determination of the total mercury content in environmental samples — Waste waters

Cited by 13 publications

References 22 publications

Enhanced performance of Fe³⁺ detection via fluorescence resonance energy transfer between carbon quantum dots and Rhodamine B

Enhanced performance of Fe³⁺ detection via fluorescence resonance energy transfer between carbon quantum dots and Rhodamine B

Highly Sensitive Spectrofluorometric Determination of Trace Amounts of Mercury with a New Fluorescent Reagent, 2-Hydroxy-1-naphthaldehydene-8-aminoquinoline

Micellar mediated trace level mercury quantification through the rhodamine B hydrazide spirolactam ring opening process

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Spectrofluorometric method for determination of the total mercury content in environmental samples — Waste waters

Cited by 13 publications

References 22 publications

Enhanced performance of Fe3+ detection via fluorescence resonance energy transfer between carbon quantum dots and Rhodamine B

Enhanced performance of Fe3+ detection via fluorescence resonance energy transfer between carbon quantum dots and Rhodamine B

Highly Sensitive Spectrofluorometric Determination of Trace Amounts of Mercury with a New Fluorescent Reagent, 2-Hydroxy-1-naphthaldehydene-8-aminoquinoline

Micellar mediated trace level mercury quantification through the rhodamine B hydrazide spirolactam ring opening process

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Enhanced performance of Fe³⁺ detection via fluorescence resonance energy transfer between carbon quantum dots and Rhodamine B

Enhanced performance of Fe³⁺ detection via fluorescence resonance energy transfer between carbon quantum dots and Rhodamine B