Automatic determination of insolubles in lubricating oils by flow injection analysis employing an LED-photometer detector

Pignalosa, Gustavo; Sixto, Alexandra; Knochen, Moisés

doi:10.1016/j.talanta.2007.05.017

Cited by 8 publications

(7 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The traditional way to introduce oil samples into ICP is directly diluting with an appropriate organic solvent. [13][14][15][16] This procedure does not minimize the problems associated with the high organic load, and necessarily requires the use of expensive and unstable organometallic standards for calibration. Besides, the manipulation of toxic organic solvents makes the procedure very harmful for the analysts.…”

Section: Introductionmentioning

confidence: 99%

Extraction induced by emulsion breaking as a tool for simultaneous multi-element determination in used lubricating oils by ICP-MS

Zhao

Zhou

et al. 2015

Anal. Methods

View full text Add to dashboard Cite

This paper reports, for the first time, rapid simultaneous multi-element determination of Mg, Cr, Ni, Cu and Pb in used lubricating oils after their extraction/preconcentration from samples using the novel extraction induced by emulsion breaking. The quantification of the metals of interest in the extracts was performed by ICP-MS using rhodium as an internal standard. First, in order to make it possible to prepare the emulsion, 4 mL of each oil sample was mixed with 1 mL of toluene. Then the diluted oil sample was emulsified with 1 mL of Triton X-114 acid solution. Once the extraction of the metals was completed, the emulsion was broken by centrifugation for 10 min at 6000 rpm. After that, the lower aqueous phase, containing the analytes that were extracted from oil, was collected for the determination by ICP-MS. Several parameters affecting the extraction efficiency of the procedure were investigated including the nature and concentration of the solvent used for sample dilution, the type and concentration of the surfactant, the concentration of HNO 3 , and the other operational conditions (extraction time, collection time and centrifugal speed). The limits of detection for Mg, Cr, Ni, Cu and Pb were 0.126, 0.058, 0.028, 0.078 and 0.009 mg L À1 , respectively. The accuracy of the method was checked by application of a recovery test, by an analysis of standard reference materials (SRM 1084a and 1085b) and by comparison with the microwave digestion method.

show abstract

Section: Introductionmentioning

confidence: 99%

Extraction induced by emulsion breaking as a tool for simultaneous multi-element determination in used lubricating oils by ICP-MS

Zhao

Zhou

et al. 2015

Anal. Methods

View full text Add to dashboard Cite

show abstract

“…However, these methods have drawbacks including high cost, complexity analysis, low sample throughput, and need for sample pretreatment (acidic extraction of iron, emul-sication or saponication of the oil). [18][19][20][21][22] In the present study, the feasibility of using a FBA system to determine Fe(III) in edible oils without external pretreatment is demonstrated. The automatic method is based on the reaction of this ion with thiocyanate in organic medium and on the photometric measurements of the formed [Fe(SCN)] 2+ complex, which has a maximum absorbance at 510 nm.…”

Section: Introductionmentioning

confidence: 87%

“…Table 5 presents selected analytical features of the proposed FBA, sequential injection analysis (SIA), 1 ow injection analysis (FIA), 15,22 and multicommuted ow analysis 23 systems for the determination of Fe(III) in edible and lubricating oils. In general, the proposed FBA (compared to other procedures) presents satisfactory parameters, such as the limit of detection, working range and sampling rate.…”

Section: Analytical Methods Papermentioning

confidence: 99%

“…Moreover, it does not use carrier uid, and does not present dispersion problems, such as loss of sensitivity, as in other automatic ow systems. 1,15,22,23…”

Section: Analytical Methods Papermentioning

confidence: 99%

“…Also, another objective of this study is to demonstrate that analytical features can be improved when compared with previous automatic ow methods. 1,15,22,23 2 Experimental…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Using a flow-batch analyzer for photometric determination of Fe(iii) in edible and lubricating oils without external pretreatment

et al. 2013

View full text Add to dashboard Cite

Optimization of the multivariate calibration of a Vis–NIR sensor for the on-line monitoring of marine diesel engine lubricating oil by variable selection methods

Villar

Fernandez

Gorritxategi³

et al. 2014

Chemometrics and Intelligent Laboratory Systems

View full text Add to dashboard Cite

Automatic determination of insolubles in lubricating oils by flow injection analysis employing an LED-photometer detector

Cited by 8 publications

References 3 publications

Extraction induced by emulsion breaking as a tool for simultaneous multi-element determination in used lubricating oils by ICP-MS

Extraction induced by emulsion breaking as a tool for simultaneous multi-element determination in used lubricating oils by ICP-MS

Using a flow-batch analyzer for photometric determination of Fe(iii) in edible and lubricating oils without external pretreatment

Optimization of the multivariate calibration of a Vis–NIR sensor for the on-line monitoring of marine diesel engine lubricating oil by variable selection methods

Contact Info

Product

Resources

About