Application of thermal lens spectrometric detection to the determination of heavy metals by ion chromatography

Šikovec, Mateja; Novič, Milko; Franko, Mladen

doi:10.1016/0021-9673(96)00054-4

Cited by 30 publications

(8 citation statements)

References 13 publications

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“…The LOD of such a TLS system is comparable to that of other dual-beam TLS instruments, and it can be used to analyze samples with up to six different components. For determination of various inorganic species (heavy metals, inorganic anions) in the visible region, coloring reagents and ligands such as 1,10-phenanthroline (Divjak et al, 1998), pyridine-2,6-dicarboxylic acid ( Sikovec et al, 1995( Sikovec et al, , 2001, 1,5-diphenylcarbazide (Mad zgalj et al, 2008;Sikovec et al, 1995Sikovec et al, , 2001, and 4-(2-pyridylazo) resorcinol ( Sikovec et al, 1996) were used for derivatization. However, derivatization is sometimes difficult to perform, especially for small molecules.…”

Section: Improvements Of Specificitymentioning

confidence: 99%

Progress in Thermal Lens Spectrometry and Its Applications in Microscale Analytical Devices

Liu

Franko

2014

Critical Reviews in Analytical Chemistry

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Development of thermal lens spectrometry (TLS) as a micro space-compatible photothermal technique and its applications for analysis of different chemical compounds in micro space and particularly in microfluidic systems are reviewed. Theoretical treatment of TLS in micro space has evolved from simply following conventional theory and predictions in macro space to employing a more accurate theory where impacts of the excitation source (Gaussian laser, top-hat incoherent light source, beam divergence, power density), detection scheme (probe beam waist, mode-mismatching degree), sample flow, and sample cell (top/bottom layers, side wall) on the TL signal are included. Noise sources (light sources, sample status, detector) in TLS systems have been analyzed, and optimum pinhole-to-beam radius ratio is suggested for the maximum signal-to-noise ratio. With different excitation light sources from ultraviolet, to visible, to near-infrared regions and coupled with microfluidic devices, these TLS instruments with good temporal and spatial resolution have found many applications for highly sensitive and/or high-throughput detection of chemical or biochemical analytes, for cell imaging or single particle/molecule detection, and for characterization of molecular diffusion in single- or two-phase systems. Prospects and challenges of TLS for future applications in microchemical analysis are discussed.

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Section: Improvements Of Specificitymentioning

confidence: 99%

Progress in Thermal Lens Spectrometry and Its Applications in Microscale Analytical Devices

Liu

Franko

2014

Critical Reviews in Analytical Chemistry

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“…These metals can be essential or toxic for the organism. Sikovec et al 19 have evaluated the applicability and limitations of dual-beam thermal lens spectrometry (TLS) detection in ion chromatography separations of different heavy metal ions (Cu 2+ , Ni 2+ , Co 2+ , Zn 2+ , Cd 2+ , Pb 2+ , Fe 2+ , and Fe 3+ ) and they have investigated the influence of experimental parameters such as excitation laser power on the TLS signal. As a result, in the case of Cu 2+ and Co 2+ TLS detection at 514.5 nm was found to be advantageous compared with UV-visible detection at 520 nm (λ max = 520 nm), in the case of Zn 2+ and Ni 2+ the detection limits of the two techniques were comparable.…”

Section: Determination Of Other Metalsmentioning

confidence: 99%

Thermal Lens Spectrometry as Analytical Tool

Navas¹,

Jiménez²

2003

Critical Reviews in Analytical Chemistry

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“…Such assessments would need to be carried out either in fields or immediately after collecting samples, because Fe 2+ tends to rapidly oxidize and become Fe 3+ . There are numerous analytical techniques used for iron speciation, such as ion chromatography, [4][5][6][7][8][9] flow-based analysis, [10][11][12][13][14][15] solvent extraction and flame atomic absorption spectrometry (AAS), 16 voltammetry, [17][18][19] and fluorescence spectrophotometry. 20 However, apart from some flow-based analysis systems, these techniques are infrequently used in field work due to the instrument size and a non-portable nature.…”

Section: Introductionmentioning

confidence: 99%

Double-sided Microfluidic Device for Speciation Analysis of Iron in Water Samples: Towards Greener Analytical Chemistry

et al. 2015

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Microfluidics minimize the amounts of reagents and generate less waste. While microdevices are commonly single-sided, producing a substrate with microchannels on multiple surfaces would increase their usefulness. Herein, a polymethymethacrylate substrate incorporating microchannel structures on two sides was sandwiched between two polydimethylsiloxane sheets to create a multi-analysis device, which was used for the spectrophotometric analysis of the ferrous ion (Fe 2+ ) and the ferric ion (Fe 3+ ), by utilizing colorimetric detection. To monitor the signals from both channel networks, dual optical sensors were integrated into the system. The linear ranges for Fe 2+ and Fe 3+ analyses were 0.1 -20 mg L -1 (R 2 = 0.9988) and 1.0 -40 mg L -1 (R 2 = 0.9974), respectively. The detection limits for Fe 2+ and Fe 3+ were 0.1 and 0.5 mg L -1 , respectively. The percent recoveries of Fe 2+ and Fe 3+ were 93.5 -104.3 with an RSD < 8%. The microdevice demonstrated capabilities for simultaneous analysis, low waste generation (7.2 mL h -1 ), and high sample throughput (180 h -1 ), making it ideal for greener analytical chemistry applications.

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Application of thermal lens spectrometric detection to the determination of heavy metals by ion chromatography

Cited by 30 publications

References 13 publications

Progress in Thermal Lens Spectrometry and Its Applications in Microscale Analytical Devices

Progress in Thermal Lens Spectrometry and Its Applications in Microscale Analytical Devices

Thermal Lens Spectrometry as Analytical Tool

Double-sided Microfluidic Device for Speciation Analysis of Iron in Water Samples: Towards Greener Analytical Chemistry

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