Sensitive determination of mercury in tap water by cloud point extraction pre-concentration and flow injection-cold vapor-inductively coupled plasma optical emission spectrometry

Wuilloud, Jorgelina C. A. de; Wuilloud, Rodolfo G.; Silva, María Fernanda; Olsina, Roberto A.; Martínez, Luis D.

doi:10.1016/s0584-8547(01)00393-7

Cited by 152 publications

(60 citation statements)

References 27 publications

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“…Among all reported methods, the lowest detection limit was obtained by using CV-AFS 6 and the more sophisticated instruments such as ICP-MS. 8 In contrast to the proposed AgNP protocol, however, CV-AFS and most of these ICP methods have used initial preconcentration steps of up to 200 times concentration-factor to increase the detection limit. 39,40 Therefore, the detection limit of the proposed AgNP method could be improved by applying a preconcentration step as an initial procedure. [41][42][43] In addition to enriching the concentration of an analyte in final solution, initial preconcentration steps are also useful to remove the high matrix content in samples (e.g.…”

Section: Colorimetric Detection Of Mercury and Analytical Performancementioning

confidence: 99%

Colorimetric Detection of Mercury(II) Ion in Aqueous Solution Using Silver Nanoparticles

et al. 2017

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Novel green-chemistry synthesis of silver nanoparticles (AgNPs) is introduced as a low-cost, rapid and easy-to-use analytical method for mercury ion detection. Aqueous fruit extract of water apple (Syzygium aqueum) was used for the first time as bioreductant to synthesize stable AgNPs. The prepared AgNPs have a yellowish-brown color with a surface plasmon resonance peak at 420 nm. The addition of Hg(II) ions then changes the AgNPs color to colorless. The color change was in proportion to the concentration of Hg(II) ions. The presence of other metal ions in the system was also evaluated. The proposed method shows good selectivity and sensitivity towards Hg(II) ions. Using UV-visible spectrophotometry, the detection limit of the developed method was 8.5 × 10 -7 M. The proposed method has been successfully applied for determination of Hg(II) ions in tap and lake water samples with precision better than 5%.

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Section: Colorimetric Detection Of Mercury and Analytical Performancementioning

confidence: 99%

Colorimetric Detection of Mercury(II) Ion in Aqueous Solution Using Silver Nanoparticles

et al. 2017

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“…metal ions after reaction with a suitable hydrophobic ligand) may be extracted from the initial solution and may also be pre-concentrated. 15 In the previous studies, 3,10,[20][21][22][23][24][25][26][27][28][29][30][31][32] the detection of an analyte in the surfactant-rich phase was carried out without removing water from the final diluted surfactant-rich phase. It seems that drying the surfactant rich-phase and applying pure methanol (without water) as a diluent enhances the absorbance signal of the analyte in the extracted phase, which in turn gives an increase in the enhancement factor and sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Sensitive and Simple Cloud-point Preconcentration Atomic Absorption Spectrometry: Application to the Determination of Cobalt in Urine Samples

Manzoori

Karim‐Nezhad

2003

ANAL. SCI.

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A new approach for developing a cloud-point extraction-flame atomic absorption spectrometric method has been described and used for the determination of cobalt. In this approach, water was removed from the final diluted surfactant rich phase obtained in cloud-point extraction procedure. The results indicated that removing water from this phase increased the enhancement factor by 4-fold. 1-(2-Pyridylazo)-2-naphthol (PAN) and octylphenoxypolyethoxyethanol (Triton X-114) were used as a hydrophobic ligand and a nonionic surfactant, respectively. The chemical variables affecting the preconcentration step were optimized. The effect of the water concentration in the final diluted methanolic surfactant solution on the analytical signal was investigated. The results showed that the analytical signal decreased by 30% and 52% in 15% and 25% water concentrations in methanol, respectively. An enhancement factor of 115 was obtained for cobalt extracted from only 10 ml of a sample. The detection limit obtained under the optimal condition was 0.38 µg l -1 . The proposed procedure was applied to the determination of cobalt in urine samples.

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“…For determination of chemical species or elements in water, there are various techniques such as atomic absorption spectroscopy (AAP), inductively coupled plasma optical emission spectroscopy (ICP-OES), laser induced breakdown spectroscopy (LIBS), fiber optic evanescent wave spectroscopy (FEWS), laser induced fluorescence spectroscopy (LIFS), etc. [2][3][4][5][6]. Detection of trace elements was studied by using several aforementioned techniques but FLRD technique was utilized the first time with bare single mode fiber without any additional treatment such as coating the sensor head, or any additional optical devices such as optical spectrum analyzer.…”

Section: Introductionmentioning

confidence: 99%

Detection of trace elements in DI water and comparison of several water solutions by using EF-FLRD chemical sensors

Kaya

Wang

2017

AIP Conference Proceedings

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Abstract. Detection of trace elements in DI water and comparison of several types of water respons such as DI water, tap water, and ocean water were studied by using EF-FLRD chemical sensors. Solutions of Mg, Fe, P, and Cd elements with a concentration of 1000 μg/ml (1 mg/ml) which corresponds to 1000 ppm by weight were tested. DI water, tap water, and real ocean water were utilized as medium to observe refractive index difference of solutions. The EF sensing technique which is based on the EF scattering effect was employed for the detection of trace chemicals and recording of solution responses. Due to the refractive index differences between solutions, optical loss of the sensor was different when the sensor head was immersed into solutions of approximately 10 ml each. The differences of the refractive indices are presented by recording ringdown times when the sensor head was immersed into the solutions. Fast response (~1s), high sensitive, and reproducible EF-FLRD chemical sensors were fabricated and tested in laboratory conditions. High sensitivity of the sensors due to being capability of detecting smaller differences between measurands without any additional components or treatment makes the EF-FLRD sensors more attractive. Enhanced sensitivity of the EF-FLRD chemical sensors as a result of the multi-pass nature of the FLRD technique has potential application in detecting of trace elements in monitoring of water quality.

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Sensitive determination of mercury in tap water by cloud point extraction pre-concentration and flow injection-cold vapor-inductively coupled plasma optical emission spectrometry

Cited by 152 publications

References 27 publications

Colorimetric Detection of Mercury(II) Ion in Aqueous Solution Using Silver Nanoparticles

Colorimetric Detection of Mercury(II) Ion in Aqueous Solution Using Silver Nanoparticles

Sensitive and Simple Cloud-point Preconcentration Atomic Absorption Spectrometry: Application to the Determination of Cobalt in Urine Samples

Detection of trace elements in DI water and comparison of several water solutions by using EF-FLRD chemical sensors

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