<i>Photothermal Spectroscopy Methods for Chemical Analysis</i>

Bialkowski, Stephen E.

doi:10.1063/1.2807813

Cited by 363 publications

(158 citation statements)

References 0 publications

Supporting

Mentioning

141

Contrasting

Unclassified

Order By: Relevance

“…(4)) reflecting thermooptical properties of solvents. 2 However, this approach can be used to predict the overall sensitivity (calibration slope) only and does not aid in estimating limits of detection and quantification, which depend on background fluctuations. A comparison of LODs or LOQs for a certain test substance in a pair of solvents (Eq.…”

Section: Comparison Of Media For Thermal Lensingmentioning

confidence: 99%

“…1,2 In practice, lensing of a single test sample usually comprises 50 -100 on-off pumping cycles. While constructing a calibration plot, a researcher takes the average of this series (Eq.…”

Section: Comparison Of Media For Thermal Lensingmentioning

confidence: 99%

“…to this parameter is much less significant than the medium nature, which becomes the most important factor. 2,3,[19][20][21] The RSDstab parameter can be used for estimating the background fluctuations in a given solvent; the comparison of ratios of RSDstab to E0 for a pair of solvents (RE, Eq. (6)) could be a good estimation of the expected ratio of LODs (Table 2).…”

Section: Comparison Of Media For Thermal Lensingmentioning

confidence: 99%

“…[1][2][3][4] Until now, a number of studies have dealt with surfactants as media modifiers in thermal lensing, but mainly in physicochemical studies. [5][6][7][8][9][10] The aims of this work were (1) to study the effect of an inert nonionic surfactant (Triton X-100) on performance characteristics of thermal lensing of iron(II)-1,10-phenanthroline and cobalt(III)-2-nitroso-1-naphthol as model systems and (2) to use the change in the thermooptical properties of water for the determination of the surfactant itself.…”

mentioning

confidence: 99%

See 3 more Smart Citations

The Use of Triton X-100 in Thermal Lensing of Aqueous Solutions

et al. 2000

View full text Add to dashboard Cite

Finely dispersed colloidal systems based on surfactants can be successfully used in thermal lens spectrometry: they change thermooptical parameters of water due to disturbance in the structure of hydrogen bonds resulting in an increase in the temperature gradient of refractive index and a decrease in the thermal conductivity. [1][2][3][4] Until now, a number of studies have dealt with surfactants as media modifiers in thermal lensing, but mainly in physicochemical studies. [5][6][7][8][9][10] The aims of this work were (1) to study the effect of an inert nonionic surfactant (Triton X-100) on performance characteristics of thermal lensing of iron(II)-1,10-phenanthroline and cobalt(III)-2-nitroso-1-naphthol as model systems and (2) to use the change in the thermooptical properties of water for the determination of the surfactant itself. Experimental ApparatusThe scheme of the parallel dual-beam thermal lens spectrometer was described in the previous paper. 11 A pump Ar + laser (Innova 90-6, Coherent, Palo Alto, CA 94303, USA) was operated at 514.5 nm; laser power in the cell was 40 mW (chopping rate 0.3 Hz). An SP-106-1 He-Ne laser (Spectra Physics, Eugene, OR 97402, USA; 10 mW, 632.8 nm) was exploited as a probe. Changes in intensity were measured in the central part (2 mm) of the probe beam by a single far-field photodiode detector connected to a DT-2801A ADC-DAC PC board (Data Translation Inc., Marlboro MA, USA; ADC conversion rate 27.5 kHz). The data were gathered and handled in a real-time mode by the software written in-house. 11 Spectrophotometric measurements were made using an SF-46 spectrophotometer (LOMO, St. Petersburg, Russia). Quartz cells (optical pathlength of 10 mm) were used throughout. Each pH value was measured by an EV-74 potentiometer (Gomel', Belarus) with the precision of ±5%. Solution densities were measured with a KLP Urometr GOST 1032-60 areometer kit (Russia). Refractive indices were measured with an RF-22 refractometer (Russia). All the solutions were homogenized prior to the measurements with a Branson 2510 ultrasonic bath (USA). Reagents and solventsThe following reagents were used throughout: analytical-grade ammonium iron(II) sulfate hexahydrate, 1,10-phenanthroline monohydrate, 2-nitroso-1-naphthol, sodium acetate, and acetic acid (99.7+%); chemically pure cobalt(II) sulfate hydrate, hydrochloric acid, and sodium hydroxide; biochemically pure ascorbic acid; a standard phosphate buffer solution, pH 6.9; and Triton X-100 (molecular biology product, 100%; from Sigma, St. Louis MO, USA). Unless otherwise stated, the reagents were from Reakhim (Moscow, Russia). Distilled and doubly distilled water and analytical-grade chloroform were used as solvents. Pre-synthesized chelates of cobalt(III) tris-(2-nitroso-1-naphtholate) 12 and iron(II) tris-(1,10-phenanthrolinate) 13 were prepared according to existing procedures.Characteristics of aqueous solutions of Triton X-100 are summarized in Table 1. The cloud point is not reached for the studied ranges of surfactant concentrations (1.5×10 ...

show abstract

Section: Comparison Of Media For Thermal Lensingmentioning

confidence: 99%

“…1,2 In practice, lensing of a single test sample usually comprises 50 -100 on-off pumping cycles. While constructing a calibration plot, a researcher takes the average of this series (Eq.…”

Section: Comparison Of Media For Thermal Lensingmentioning

confidence: 99%

Section: Comparison Of Media For Thermal Lensingmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

The Use of Triton X-100 in Thermal Lensing of Aqueous Solutions

et al. 2000

View full text Add to dashboard Cite

show abstract

“…The phase shift and amplitude damping depend on the thermal conductivity and specific heat capacity of the sample material. Thus, any differences in the structural density of the material-including those originating from impurities, dislocations, cracks, or density fluctuations due to compression or stretching-can be detected [7,8].…”

Section: Photothermal Analysismentioning

confidence: 99%

Weight-Optimized Bushingless Connecting Rods: Improving the Tribological Performance of a Gudgeon Pin/Connecting Rod System by Using the Triboconditioning® Process

Lundmark¹,

Zhmud²,

Brodmann³

et al. 2017

JMSE-A

View full text Add to dashboard Cite

Abstract:The risk of failures associated with a distressed pin/connecting rod bearing contact without forced pin oiling is exaggerated due to ever increasing power density and torque output of modern TSI (turbocharged straight injection) and TDI (turbocharged direct injection) engines, in combination with the introduction of low-viscosity low-SAPS (sulfated ash, phosphorus, sulfur) lubricants and general engine downsizing resulting in fewer cylinders to bear the load. This forces OEMs (original equipment manufacturer) to look for innovative cost-efficient solutions to promote bushingless connecting rods without impacting reliability. One such solution is the Triboconditioning® process. Triboconditioning is an industrial surface finishing process which attempts to carry out running-in of components during their manufacture. The present paper provides an in-depth analysis of the tribological effects of Triboconditioning® on the pin/conrod contact.

show abstract