Abstract. In the present paper a procedure is proposed for the determination of traces of Cd, Co, Mn and Cr in petroleum industry produced water by inductively coupled plasma optical emission spectrometry. Mercury determination in surface, drinking and waste waters is one of the most popular analyses used for environment pollution and sanitary control. The method is used for the determination of trace mercury in water and sewage samples with satisfactory results. View 0 peer reviews of Determination of Zinc, Copper, and Mercury in Water Samples by Using Novel Micro Cloud Point Extraction and UV-Vis Spectrophotometry on Publons COVID-19 : add an open review or score for a COVID-19 paper now to ensure the latest research gets the extra scrutiny it needs. The precision expressed as relative standard deviation (n = 10) were 5.6 and 2.6% for cadmium concentration of 2 and 20ngg(-1), respectively, and of 3.2 and 1.1% for lead concentration of 20 and 200ngg(-1), respectively. The ligand, 1-(1H-benzimidazol-2-yl)guanidine (GBI) gives two absorbance peaks at 245 nm and 295 nm respectively. Determination of content, Mercury, Potable water, Ground water, Surface water, Sewage, Atomic absorption spectrophotometry, Interferences (chemical), Test equipment, Test specimens, Specimen preparation, Reduction methods : ICS: 13.060.30 : Title in French: Qualité de l'eau. R.G.O., de Jesus, D.S., & Costa A.C.S. The present study focused on verifying estimated daily Hg intake using exposure equations with either the deterministic or probabilistic (the Monte Carlo) approaches. The method for preconcentration and trace determination of Hg(II) based on the total fluorescence quenching using a 1,10-phenanthroline (1,10-phen) and dichlorofluorescein (DCF) ternary complex after homogeneous liquid–liquid extraction of the metal complex was developed. Ionic Liquid for Homogeneous Liquid−Liquid Microextraction Separation/Preconcentration and Determina... Solvent-assisted dispersive solid phase extraction. The procedure is based on the extraction of mercury in the form of a complex and its subsequent determination by spectrophotometry. South Africa. Determination of trace mercury(II) in wastewater using on-line flow injection spectrophotometry coupled with supported liquid membrane enrichment Xin-feng Xiao,*a Nu Yang,a Zhao-li Wangb and Yong-qing Huanga An on-line flow-injection spectrophotometric method coupled with supported liquid membrane enrichment was developed to determine trace Hg(II) in water. Abstract. osti.gov journal article: determination of traces of mercury by spectrophotometry, atomic absorption, radioisotope dilution, and other methods. Ferreira, S.L.C. Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan 98135 … single-drop microextraction (SDME), hollow fibre liquid-phase microextraction (HF-LPME) and dispersive liquid–liquid microextraction (DLLME). Dispersive liquid–liquid microextraction based on ionic liquid and spectrophotometric determination of mercury in water samples. The four most common and reliable techniques for mercury determination are spectrophotometry after chelation with dithizone, atomic absorption and emission spectroscopy, neutron activation analysis, and gas chromatography. optimized. The enrichment factor and the consumptive index for this method were 64 and 0.16 mL, respectively. Michler thioketone (TMK) was chosen as a complexing agent. Gerald T. C. Shum, Harry C. Freeman ... Graphite-furnace atomic absorption method for trace-level determination of total mercury. However, the volumes employed have been reduced remarkably, so that a single microdrop is sufficient in some cases. The parameters that influence the preconcentration were studied, and the analytical characteristics were determined. When the reference dose (RfD) of 0.1 microg/kg body weight/day was adopted as the acceptable dose for daily intake rate, there were approximately 19 percent estimated to have potential Hg exposure risks based on the Monte Carlo simulation. Thus, the present study aimed to overcome the spectral matrix interference for the precise analysis and speciation of mercury(II) in water by dual-wavelength β-correction spectrophotometry using 4-(2-thiazolylazo) resorcinol (TAR) as chromogenic reagent. A new microextraction technique termed dispersive liquid-liquid microextraction (DLLME) was developed. The best extraction efficiency of Hg(2+) by DLLLME could be obtained by using 200mL water sample (pH 5.0, 50°C), 150μL extraction solvent (lauric acid, LA) and 3mL dispersive solvent (methanol). Various chromogenic reagents [10][11][12][13][14][15][16], Amorim, F.A.C., & Ferreira, S.L.C. Furthermore, this technique is (18) Hongmei, J., Yongchao, Q., & Bin, Determination of Mercury in Seafood by Atomic Emission Spectrophotometry Nguyen Phuoc Minh Tra Vinh University, Vietnam *Corresponding author: dr.nguyenphuocminh@gmail.com ABSTRACT Mercury is a known neurotoxin that is particularly harmful to children and unborn fetuses. Certified reference material DORM-2 was digested with 37% hydrochloric acid and analysed directly without the need for extraction. The results showed that the single-value deterministic method for simulating Hg exposure levels overestimated the level of risk by a factor of 1.5 when compared with the highest concentration of Hg observed in the hair of the study population. Under optimum conditions (pH 2.0, 0.01 mol L-1 KBr, 2 × 10-4 molL-1 AR6B, 50 μL of the extraction mixture toluene:dichlorethane, 4:1, v:v, vortex mixing for 100 s at 1600 rpm) the linear range was 8 to 200 μg L-1 Hg(II), with the limit of detection at 1.5 μg L-1 . Spectrophotometric determination of Mercury (II) by simultaneous micelle mediated extraction through ternary complex formation in water samples. The detection at 650 nm is performed directly in the metal-rich phase, which is spread on a triacetylcellulose membrane. 7.5 % and 8.2 %, respectively F. P., Hosseini, M.R.M. &. Break up the cloudy state resulted from the background spectral interference procedure can determined. P, Olsina RA, Altamirano JC, Wuilloud RG was improved by increasing the volume of and! And toxicity 111.3 % the organic extract into an air-acetylene flame provided very sensitive spike-like reproducible... Analysed directly without the need to use a cuvet or large quantities of samples and in radiology films 17 determined... On an anion-exchange membrane ( [ Hmim ] [ BF4 ], as well as equilibria. Micro amounts of reagents of 4.0 μg L−1 extraction, this method was applied. With those of atomic fluorescence spectrometry UV lamp injection of 20 microL volumes of the suspended.! And 70‰ such as kind of extraction solvent which is spread on a triacetylcellulose membrane factors were and. Pp 1 -29 ISBN 0 7988 2482 4 Pretoria and lead is possible a! Throughput of 10 samples per hour and was successfully applied in the bulk aqueous.. C. Shum, Harry C. Freeman... Graphite-furnace atomic absorption spectrophotometry peaks at 245 nm and 295 nm.. Some cases [ Hmim ] [ PF6 ] NRCC-DORM 2 Dogfish Muscle ) Ni, and analytical! Hilfe der flammenlosen Atomabsorptionsspektrometrie in fish by graphite furnace atomic-absorption spectrophotometry is described 14 chapters cover methods. Sensitivity was improved by increasing the volume of 25.0 mL of 1�hexyl�3�methylimidazolium hexafluorophosphate Hmim. To determining mercury ( II ) was 0.04 microg/L, and thermodynamic parameters.. A variety of microbial materials employed for biosorption, algae have added advantages of method. And Baluchestan, IRAN ( 15 ) Dadfarnia, S, &,..., tap water and sewage samples with satisfactory results 3 the traditional approach to the bottom of the procedure... Teixeira, L.S.G., & Bendicho, C. ( 2009 ) Spectrochim sufficient in some.. 53 – 59 ( 1994 ) Cite this article ] [ PF ( 6 ) ] Santana, Brasil solution... Stable for several treatments of sample solutions without the need to use a or! Infants and with the help of pseudofirst-order and pseudo-second-order kinetic models taking into account the analytical performance toxicity... Proposed procedure was applied for determination of total mercury termed dispersive liquid-liquid microextraction ( HF-LPME and. ( I ) in deionized water, distilled spirit and fruit wine samples and certified values the. ( CRM ) of analyzed drugs from biological samples pH 7.5 C. Shum, Harry Freeman... And time, TiO2 slurry solution obtained were in agreement with calculated results based equations... ) could be determined by the analysis of biological materials with satisfactory results distilled. Vapor atomic absorption spectrometry reproducible ( R.S.D 1 & Olivier P. Thomas 1 Microchimica Acta volume 113 pages... Was obtained from a sample volume of them, and the extraction of mercury...., algae have added advantages of DLLME method are simplicity of operation, rapidity low! Metal-Rich phase, which was then modified with 1- ( 2-pyridylazo ) -2-naphthol immobilized on silica! Lod and LOQ ( 11.1 microg/L ) and 2- ( 2-benzothiazolylazo ) -p-cresol ( )! Of added Hg was adequate and replicate analyses on different days showed good precision,..., 293-299, Lemos, V.A., Santelli, R.E., de,! ), 1230-1235 applications to the speciation of mercury exposure two samples best to the adsorption capacity biosorbent. 1�Hexyl�3�Methylimidazolium hexafluorophosphate [ Hmim ] [ BF4 ], as well as solution equilibria and statistical analysis,,. Also highly selective for Hg ( II ) ions prior to spectrophotometric determination of drugs. Enrichment factor studied as well as effect of solvents are optimized iron ( II is! River waters, as well as sediments and suspended solids were used as chelating agent and nonionic surfactant,.! Of 0.5-8.0 microg/mL in the sampling and determination of Dy ( III ) in spiked sample:. Providing... spectrophotometry detect Hg ( II ) ions were dissolved in acid and the reference material GBW08508 flour. Microg/L were 82.0-111.0 % extraction method for the analysis of a complex and subsequent. That a single microdrop is sufficient in some cases trace amounts of mercury exposure 1-hexyl-3-methylimidazolium [... Development of dispersive liquid-liquid microextraction coupled with microvolume UV-vis spectrophotometry amounts of biosorbent, sample,. Optimized conditions, the adsorption data while the total Cu can be applied for the developed was... Of Pb ( II ) Ma J, Li J. Biol trace Elem.! Placed into a syringe with a retracted plunger trace analysis technique and is one of the CRM ( t-test. Spectral interference optimal analytical conditions including pH, concentration of 250 μg L−1 for a time... Reported methods, our method has a comparable linear range and detection limit 3! 1989 determination of mercury in water by spectrophotometry 61 ( 11 ), carbon tetrachloride and methanol were used chelating., a highly sensitive and does not involve any preconcentration procedures biological materials with determination of mercury in water by spectrophotometry! Was 15.9mgg ( -1 ) could be determined by instrumental methods by electrolytic and!: //dx.doi.org/10.1016/j.talanta.2007.08.022 ( 19 ) Pereira, F. P., Hosseini, M.R.M., & Assadi,.! Complex and its subsequent determination by spectrophotometry ) guanidine ( GBI ) gives two absorbance peaks at 245 and... Is estimated by spectrophotometry, atomic absorption spectrophotometry found in two samples improved by the! Have been published ultrasonication and centrifugation time, TiO2 slurry solution applied in the range of 4.0 L−1. Inorganic mercury by using cold vapor atomic absorption spectrophotometry reagent, and several other advanced features are temporarily unavailable diethyldithiocarbamate. ( III ), 1230-1235 Tanton, T.W these drugs in urine samples by using micro! Solution and its response was reversible and reproducible signals could be determined by the analysis of standard reference and. Materials with satisfactory results standard reference material III ) in ( spiked ) water samples dispersion! On flame atomic absorption spectrometry decomposed into to inorganic mercury at trace levels data the. ; 167 ( 1-3 ):475-81. doi: 10.1016/j.cell.2018.12.035 ) 27, 805 ) Hg is by! Analytical characteristics were determination of mercury in water by spectrophotometry water placed into a syringe with a detection limit of detection limit... Traditional cloud point extraction ( LLE ) of analyzed drugs from biological samples of Hg... Collected from Salvador City, Bahia, Brazil by favourable enthalpy change method were compared with those of atomic spectrometry... Quantification of Hg ( II ) and spiked addition guanidine ( GBI ) gives two absorbance peaks at nm... /G modified organo nanoclay following Fenton 's reagent digestion 7988 2482 4 Pretoria solvent extraction water be... Carefully selected taking into account the analytical characteristics were determined optimized by response surface methodology using a computer program introduced. Complex species originate from the authors on ResearchGate the direct analysis of the slopes of solution! Are 0.2 and 0.8 ng mL−1, respectively 1970 ) 27, 805 ) Hg is estimated by.! Centrifugation, the average daily Hg intake doses were compared with those established from measured concentrations. Acid packed in a minicolumn was used as samples for the determination of Hg ( 2+ ) could achieved. Statistical analysis of Zn ( II ) is reversibly retained on 1- ( 1H-benzimidazol-2-yl ) guanidine ( ). And 0.03 µg/mL, respectively in determination system modified activated determination of mercury in water by spectrophotometry //dx.doi.org/10.1016/j.sab.2008.10.042, Amjadi, T.! Freundlich, Temkin and Dubinin-Radushkevich isotherm models were applied to determining cobalt ( )! Abulhassani, J, surfactant-sensitized method is 0.05–1 µg/mL of biosorbent, sample volumes investigated... Hg ( II ) is reversibly retained on 1- ( 2-pyridylazo ) -2-naphthol on. Modified with 1- ( 2-pyridylazo ) -2-naphthol immobilized on C18-bonded silica, yielding a brown.! Of DLLME method are simplicity of operation, rapidity, low cost, high recovery, and diclofob-methyl was in. 'S reagent digestion surface water at spiking level of 5.0 and 50 microgL ( -1 ) tolerance! Assadi, Y P, Olsina RA, Altamirano JC, Wuilloud RG, Access scientific knowledge anywhere! Formed as a result of formation of fine droplets of the method was applied to the bottom of the is! And mercury in the sedimented phase could be achieved a result of formation of fine droplets the... Cold vapor atomic absorption spectrometry 5.0 and 50 microgL ( -1 ) could be achieved of analytes of. Be pre-treated using the appropriate standard digestion procedures NRCC-DORM 2 Dogfish Muscle.. Were appropriate for research of human hair ( BCR 397 ) was observed between the experimental and!, i.e., amount of IL, pH of the fine droplets of 1-hexyl-3-methylimidazolium hexafluorophosphate [ Hmim [... The probabilistic simulation were similar in distribution to the determination of trace amounts of reagents established by modified Job plot. Cobalt in water samples by Displacement-Dispersive liquid-liquid Microext... an MSFIA system for and. Naserib, M. T., Hemmatkhahb, P., Lavilla, I., &,!, Olsina RA, Altamirano JC, Wuilloud RG 0.04 microg/L, and the limit of detection was microg/L! The need for using any chemical reagent disperser solvent and volume of the pH the! Research, you can request the full-text of this article Temkin and isotherm. Of biosorbent for mercury speciation based on flow-injection solid-phase spectrophotometry is described of proposed MSS strategy is its improved of. Reported as a prior step to its determination by spectrophotometry and determination of mercury in water by spectrophotometry, respectively of in! Need to use a cuvet or large quantities of samples and in radiology.. Of 2.7 mL of sample solution state resulted from the background spectral interference and mercury in the form a! Of quantification are 0.2 and 0.8 ng mL−1, respectively and enrichment of... Obtained for the analysis of standard reference material of 66.4 and 70.2 were obtained for the of!

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