Separation and determination of eleven environmental protection agency priority phenols by reversed-phase capillary high-performance liquid chromatography with indirect fluorophotometric detection and solid phase extraction

Chung, Yoo Seung; Lee, Kangwoo

doi:10.1016/s0026-265x(01)00074-1

Cited by 7 publications

(1 citation statement)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The determination of phenol and its derivative compounds (such as aminophenol) is of significant importance because these species are toxic [1,2] and are involved in many industrial processes [3][4][5]. For example, according to environmental legislation, the maximum concentration limit for the total phenol concentration in bodies of water is between 3.5 and 10 g L −1 [6,7].…”

Section: Introductionmentioning

confidence: 99%

Aqueous two-phase systems: a new approach for the determination of p-aminophenol

Rodrigues

Lemos

Patrício

et al. 2011

Journal of Hazardous Materials

View full text Add to dashboard Cite

A new method has been developed for the spectrophotometric determination of p-aminophenol (PAP) in water, paracetamol formulations and human urine samples with a recovery rate between 94.9 and 101%. This method exploits an aqueous two-phase system (ATPS) liquid-liquid extraction technique with the reaction of PAP, sodium nitroprusside and hydroxylamine hydrochloride in pH 12.0, which produces the [Fe(2)(CN)(10)](10-) anion complex that spontaneously concentrates in the top phase of the ATPS ([Formula in text]). The ATPS does not require an organic solvent, which is a safer and cleaner liquid-liquid extraction technique for the determination of PAP. The linear range of detection was from 5.00 to 500 μg kg(-1) (R ≥ 0.9990; n=8) with a coefficient of variation of 2.11% (n=5). The method exhibited a detection limit of 2.40 μg kg(-1) and a quantification limit of 8.00 μg kg(-1). The ATPS method showed a recovery that ranged between 96.4 and 103% for the determination of PAP in natural water and wastewater samples, which was in excellent agreement with the results of the standard 4-aminoantipyrine method that was performed on the same samples.

show abstract

Section: Introductionmentioning

confidence: 99%

Aqueous two-phase systems: a new approach for the determination of p-aminophenol

Rodrigues

Lemos

Patrício

et al. 2011

Journal of Hazardous Materials

View full text Add to dashboard Cite

show abstract

Synthesis and applications of adsorbents containing cyclodextrins

Crini¹,

2002

View full text Add to dashboard Cite

Synthesis and applications of adsorbents containing cyclodextrinsCyclodextrins (CDs), which possess a hydrophobic cavity, have a remarkable capacity to form inclusion complexes with various molecules through host-guest interactions. It is well known that the usefulness of CDs is due to the combination of the inclusion properties and structural features of these molecules. CDs are used extensively in separation science because CD-complexation phenomena offer a procedure of choice for separation of compounds and extraction processes, and provide a useful and versatile tool for protecting the environment. The present review shows the advantages accruing from the use of adsorbents containing cyclodextrins, in particular in chromatographic separations and in waste water treatment. The main goal of this review is to provide a summary of the information concerning the synthesis of materials containing CDs and to give a general overview of the different possible applications of CDs as sorbents in the field of separation techniques. Recent and continuing interest in these adsorbents is evident from the number of papers that appear each year in the literature.

show abstract

Development of a membrane‐less dynamic field gradient focusing device for the separation of low‐molecular‐weight molecules

Burke¹,

Smith²,

Ivory³

2010

Electrophoresis

View full text Add to dashboard Cite

Dynamic field gradient focusing uses an electric field gradient generated by controlling the voltage profile of an electrode array to separate and concentrate charged analytes according to their individual electrophoretic mobilities. This study describes a new instrument in which the electrodes have been placed within the separation channel. The major challenge faced with this device is that when applied voltages to the electrodes are larger than the redox potential of water, electrolysis will occur, producing hydrogen ions (H + ) plus oxygen gas on the anodes and hydroxide (OH − ) plus hydrogen gas on the cathodes. The resulting gas bubbles and pH excursions can cause problems with system performance and reproducibility. An on-column, degassing system that can remove gas bubbles "on-the-fly" is described. In addition, the use of a high capacity, low-conductivity buffer to address the problem of the pH shift that occurs due to the production of H + on the anodes is illustrated. Finally, the successful separation of three, lowmolecular-weight dyes (amaranth, bromophenol blue and methyl red) is described.

show abstract

Separation and determination of eleven environmental protection agency priority phenols by reversed-phase capillary high-performance liquid chromatography with indirect fluorophotometric detection and solid phase extraction

Cited by 7 publications

References 14 publications

Aqueous two-phase systems: a new approach for the determination of p-aminophenol

Aqueous two-phase systems: a new approach for the determination of p-aminophenol

Synthesis and applications of adsorbents containing cyclodextrins

Development of a membrane‐less dynamic field gradient focusing device for the separation of low‐molecular‐weight molecules

Contact Info

Product

Resources

About