Flow injection determination of free fatty acids in vegetable oils using capacitively coupled contactless conductivity detection

Makahleh, Ahmad; Saad, Bahruddin

doi:10.1016/j.aca.2011.03.033

Cited by 18 publications

(12 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Applications of C 4 D without electrophoretic or chromatographic separation include flow injection analysis (FIA) , SI analysis , and other methods operating with liquid or even gaseous flows. FIA was also used in the testing of C 4 D on a microfluidic device using simple salt solutions at different concentrations .…”

Section: C4d In Other Flow‐through Methodsmentioning

confidence: 99%

“…A recent review article by Connolly et al [5] gives a comprehensive overview of the applications of scanning C 4 D in the characterization of various capillary columns. Applications of C 4 D without electrophoretic or chromatographic separation include flow injection analysis (FIA) [103][104][105], SI analysis [106], and other methods operating with liquid [107,108] or even gaseous [109] flows. FIA was also used in the testing of C 4 D on a microfluidic device using simple salt solutions at different concentrations [110].…”

Section: D In Other Flow-through Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Contactless conductivity detection for analytical techniques: Developments from 2010 to 2012

Kubáň

Hauser

2012

Electrophoresis

View full text Add to dashboard Cite

The developments in the field of capacitively coupled contactless conductivity detection in the approximate period from July 2010 to June 2012 are traced. Few reports concerning fundamental studies or new detector designs have appeared. On the other hand, applications in standard CZE are flourishing and contactless conductivity measurements are increasingly being employed as part of novel or more sophisticated experimental systems. Work on the lab-on-chip devices integrating contactless conductivity detection is continuing. A range of reports on the use of the simple yet powerful detection technique of contactless conductivity measurements in chromatographic separation as well as for analytical methods not including a separation step have also appeared.

show abstract

Section: C4d In Other Flow‐through Methodsmentioning

confidence: 99%

Section: D In Other Flow-through Methodsmentioning

confidence: 99%

Contactless conductivity detection for analytical techniques: Developments from 2010 to 2012

Kubáň

Hauser

2012

Electrophoresis

View full text Add to dashboard Cite

show abstract

“…The instrumental determination of individual FFA is carried out usually by gas chromatography (GC), high performance liquid chromatography (HPLC) or capillary electrophoresis (CE), where the sample is subjected to pre-treatments such as liquid-liquid extraction (LLE) or solid-phase extraction and derivatization [7,8]. Such treatments are necessary either to increase the volatility of the analytes for GC or improve the sensitivity of analytes for HPLC and CE methods.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach for Determination of Free Fatty Acids in Vegetable Oils by a Flow Injection System with Manual Injection

Ayyıldız¹,

Kara²,

Sherazi³

2011

Lipids

View full text Add to dashboard Cite

A non-aqueous flow injection method for determining free fatty acid (FFA) content in corn and sunflower oil samples was developed. A single-line manifold system was built by modification of an HPLC for flow injection analysis (FIA). Without pre-treatment, oil samples were injected into a n-propanol solution containing KOH and phenolphthalein (PHP). The main parameters, such as flow rate of carrier phase, length, geometry, inner diameters of the coils and reagent concentration were all optimized. The proposed FIA method was validated for precision, accuracy, linear region, limit of detection (LOD) and limit of quantification (LOQ). The intra- and inter-day measurements of the precision of the method were found to be within the limits of acceptance criteria (RSD < 1%), and were rugged when the method was performed by a different analyst. The linear concentration range was calculated as 0.09-1.50 and 0.07-1.40 FFA% for corn and sunflower oils, correspondingly. The LOD and LOQ were found to be 7.53 × 10(-4)-2.28 × 10(-3) oleic acid % and 7.11 × 10(-4)-2.23 × 10(-3) oleic acid % for corn and sunflower oils, respectively. The results were compared with those obtained by the AOCS (Ca-5a-40) method using statistical t and F tests, and a significant difference was not observed between the methods at a 95% confidence level. The proposed method is suitable for quality control of routine applications due to its simplicity, high sample throughput, and economy of solvents and sample, offering considerable promise as a low cost analytical system that needs minimum human intervention over long periods of time.

show abstract

“…The classic method for olive oil acidity determination is alkaline volumetric titration (AVT) (European Commission Regulation, 1991;Mariotti and Mascini, 2001). However, other analytical approaches have been used, such as flow injection analysis in automated systems (Nouros et al, 1997;Mariotti and Mascini, 2001), flow-reversal injection liquid-liquid extraction (Zhi et al, 1996), voltammetric reduction of quinones (Takamura et al, 1999), infrared and near infrared spectroscopy (Lai et al, 1995;Cayuela et al, 2009), Raman spectroscopy (Aparicio and Baeten, 1998), flow injection analysis (FIA) (Makahleh and Saad, 2011) and gas chromatography (Lercker and Rodriguz-Estrada, 2000;Kanya et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Rapid Separation of Free Fatty Acids in Vegetable Oils by Capillary Zone Electrophoresis

et al. 2014

View full text Add to dashboard Cite

show abstract

Flow injection determination of free fatty acids in vegetable oils using capacitively coupled contactless conductivity detection

Cited by 18 publications

References 21 publications

Contactless conductivity detection for analytical techniques: Developments from 2010 to 2012

Contactless conductivity detection for analytical techniques: Developments from 2010 to 2012

A Novel Approach for Determination of Free Fatty Acids in Vegetable Oils by a Flow Injection System with Manual Injection

Rapid Separation of Free Fatty Acids in Vegetable Oils by Capillary Zone Electrophoresis

Contact Info

Product

Resources

About