کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1201178 | 1493513 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chemometric-based determination of polycyclic aromatic hydrocarbons in aqueous samples using ultrasound-assisted emulsification microextraction combined to gas chromatography-mass spectrometry
ترجمه فارسی عنوان
تعیین شیمیدایی هیدروکربن های آروماتیک چند حلقه ای در نمونه های آبی با استفاده از میکرو اکسیژن امولسیون با کمک سونوگرافی همراه با طیف سنجی جرم کروماتوگرافی گاز
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کلمات کلیدی
هیدروکربن های آروماتیک چند حلقه، میکرو اکستاشاسیون امولسیاس با کمک سونوگرافی، طراحی کامپوزیت مرکزی، طیف سنجی جرم کروماتوگرافی گاز، رزولوشن منحنی چند متغیره - حداقل مربعات متناوب،
Multivariate curve resolution-alternating least squares - رزولوشن منحنی چند متغیره - حداقل مربعات متناوبCentral composite design - طراحی مرکب مرکزیgas chromatography–mass spectrometry - طیف سنجی جرم کروماتوگرافی گازUltrasound-assisted emulsification microextraction - میکرو اکستراسیون امولسیون با کمک سونوگرافیPolycyclic aromatic hydrocarbons - هیدروکربن آروماتیک چندحلقهای
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
In the present research, ultrasonic-assisted emulsification-microextraction (USAEME) coupled with gas chromatography-mass spectrometry (GC-MS) has been proposed for analysis of thirteen environmental protection agency (EPA) polycyclic aromatic hydrocarbons (PAHs) in aqueous samples. Tetrachloroethylene was selected as extraction solvent. The main parameters of USAEME affecting the efficiency of the method were modeled and optimized using a central composite design (CCD). Under the optimum conditions (9 μL for extraction solvent, 1.15% (w/v) NaCl (salt concentration) and 10 min for ultrasonication time), preconcentration factor (PF) of the PAHs was in the range of 500-950. In order to have a comprehensive analysis, multivariate curve resolution-alternating least squares (MCR-ALS) as a second-order calibration algorithm was used for resolution, identification and quantification of the target PAHs in the presence of uncalibrated interferences. The regression coefficients and relative errors (REs, %) of calibration curves of the PAHs were in the satisfactory range of 0.9971-0.9999 and 1.17-6.59%, respectively. Furthermore, analytical figures of merit (AFOM) for univariate and second-order calibrations were obtained and compared. As an instance, the limit of detections (LODs) of target PAHs were in the range of 1.87-18.9 and 0.89-6.49 ng mLâ1 for univariate and second-order calibration, respectively. Finally, the proposed strategy was used for determination of target PAHs in real water samples (tap and hookah waters). The relative recoveries (RR) and the relative standard deviations (RSDs) were 68.4-109.80% and 2.15-6.93%, respectively. It was concluded that combination of multivariate chemometric methods with USAEME-GC-MS can be considered as a new insight for the analysis of target analytes in complex sample matrices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1413, 25 September 2015, Pages 117-126
Journal: Journal of Chromatography A - Volume 1413, 25 September 2015, Pages 117-126
نویسندگان
Mohammad Ahmadvand, Hassan Sereshti, Hadi Parastar,