ACID-INDUCED HOMOGENEOUS LIQUID PHASE MICROEXTRACTION FOLLOWED BY ONLINE-PHASE SEPARATION COUPLED TO HPLC FOR DETERMINATION OF CHLOROBENZENES

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EBRAHIMPOUR BEHNAM; YAMINI YADOLLAH

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Seminar Paper

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Seminar: IRANIAN SEMINAR OF ANALYTICAL CHEMISTRY
Year:2014 | Issue:20

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Title

ACID-INDUCED HOMOGENEOUS LIQUID PHASE MICROEXTRACTION FOLLOWED BY ONLINE-PHASE SEPARATION COUPLED TO HPLC FOR DETERMINATION OF CHLOROBENZENES

Author(s)

EBRAHIMPOUR BEHNAM | YAMINI YADOLLAH | Issue Writer Certificate

Keywords

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Abstract

CHLOROBENZENE COMPOUNDS ARE LISTED AS PRIORITY POLLUTANTS BY THE UNITED STATES ENVIRONMENTAL PROTECTION AGENCY (USEPA). A SIMPLE HOMOGENOUS LIQUID PHASE MICROEXTRACTION METHODOLOGY APPLYING OCTANOIC ACID AS EXTRACTION PHASE WAS INTRODUCED FOR DETERMINATION OF CHLOROBENZENES. IN THIS APPROACH, PHASE SEPARATION PHENOMENON OCCURRED BY CHANGING IN PH OF THE SOLUTION AND AN ACIDIC SOLUTION WAS USED AS PHASE SEPARATION REAGENT.THE EXTRACTION PHASE WAS SEPARATED BASED ON FILTRATION AGAINST OF CENTRIFUGATION FROM EMULSION AND IT INTRODUCED TO HPLC. TEN MILLILITER OF THE SAMPLE SOLUTION WAS POURED INTO A GLASS-VIAL. FORTY FIVE MICROLITER OF OCTANOIC ACID WAS SOLVED IN WATER SAMPLE BY ADJUSTING PH.BY RAPID ADDITION OF 120 ML OF CONCENTRATED HCL (PHASE SEPARATION REAGENT), A CLOUDY SOLUTION WAS OBTAINED. THEN, THE CLOUDY SOLUTION WAS PASSED THROUGH AN IN-LINE FILTER LOCATED IN A SUITABLE HOLDER [1] AND SEPARATED BASED ON EMULSION FILTRATION. BY CHANGING THE HPLC VALVE POSITION, FILTER WAS LAID IN THE MOBILE PHASE PASS AND EXTRACTION PHASE WAS ELUTED BY MOBILE PHASE AND INTRODUCED IN TO THE SEPARATION COLUMN FOR ANALYSIS. THIS METHOD WAS USED FOR EXTRACTION AND DETERMINATION OF FIVE CHLOROBENZENES IN WATER SAMPLES. EXPERIMENTAL DESIGN AND RESPONSE SURFACE METHODOLOGY WERE USED FOR OPTIMIZATION OF VARIOUS PARAMETERS INFLUENCING THE EXTRACTION EFFICIENCY OF THE METHOD [2]. UNDER OPTIMAL CONDITIONS, CHLOROBENZENES WERE EFFECTIVELY EXTRACTED AND PRECONCENTRATION FACTORS OF 237- 280 WERE OBTAINED. THE CALIBRATION CURVE WAS INVESTIGATED IN THE CONCENTRATION RANGE OF 1-200 MG L-1 AND GOOD LINEARITY WAS ACHIEVED WITH COEFFICIENT OF DETERMINATIONS BETTER THAN 0.995.DETECTION LIMITS WERE IN THE RANGE OF 0.3 AND 0.5 MG L-1 AND SUITABLE PRECISION WITH RSDS BETTER THAN 5.1 % (N=3) WERE ATTAINED. FINALLY, THE PROPOSED METHOD WAS APPLIED TO DETERMINE THE CONCENTRATION OF CHLOROBENZENES IN DIFFERENT WATER SAMPLES AND ACCEPTABLE RECOVERIES WERE GAINED.

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APA: Copy

EBRAHIMPOUR, BEHNAM, & YAMINI, YADOLLAH. (2014). ACID-INDUCED HOMOGENEOUS LIQUID PHASE MICROEXTRACTION FOLLOWED BY ONLINE-PHASE SEPARATION COUPLED TO HPLC FOR DETERMINATION OF CHLOROBENZENES. IRANIAN SEMINAR OF ANALYTICAL CHEMISTRY. SID. https://sid.ir/paper/912336/en

Vancouver: Copy

EBRAHIMPOUR BEHNAM, YAMINI YADOLLAH. ACID-INDUCED HOMOGENEOUS LIQUID PHASE MICROEXTRACTION FOLLOWED BY ONLINE-PHASE SEPARATION COUPLED TO HPLC FOR DETERMINATION OF CHLOROBENZENES. 2014. Available from: https://sid.ir/paper/912336/en

IEEE: Copy

BEHNAM EBRAHIMPOUR, and YADOLLAH YAMINI, “ACID-INDUCED HOMOGENEOUS LIQUID PHASE MICROEXTRACTION FOLLOWED BY ONLINE-PHASE SEPARATION COUPLED TO HPLC FOR DETERMINATION OF CHLOROBENZENES,” presented at the IRANIAN SEMINAR OF ANALYTICAL CHEMISTRY. 2014, [Online]. Available: https://sid.ir/paper/912336/en

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