Abstract:Matriks örneklerdeki (biyolojik, çevresel, gıda vb.) madde veya maddelerin kalitatif veya kantitatif tayinlerinde yüksek hassasiyetli analitik cihazlar geliştirilmesine rağmen, analitik cihaz çoğunlukla matriks ortamında tayinde başarısız olmaktadır. Bundan dolayı matriks ortamdan maddenin alınması (saflaştırma) ve deriştirilmesi (zenginleştirme) için genellikle ön işlem uygulanması gerekmektedir. Sıvı-sıvı ekstraksiyon (LLE) örnek hazırlamada yaygın bir şekilde kullanılmaktadır. Son yıllarda sıvı-sıvı ekstrak… Show more
“…Commonly used enrichment methods are ion exchange, adsorption enrichment, coprecipitation, volatilization and extraction. 19 One of the two main problems encountered in trace determination is whether the sensitivity of the used method is sufficient for the concentration of the analyte or not and the other is whether there are interference effects or not. One of the problems is that an enrichment process is necessary before the determination process, and the second is the necessity of the separation process.…”
Ultrasound-assisted cloud point microextraction (UA-CPME) was performed for certain preservatives (p-hydroxy benzoic acid and its alkyl esters, methyl, ethyl, propyl and butyl paraben). Then, an HPLC method was developed for...
“…Commonly used enrichment methods are ion exchange, adsorption enrichment, coprecipitation, volatilization and extraction. 19 One of the two main problems encountered in trace determination is whether the sensitivity of the used method is sufficient for the concentration of the analyte or not and the other is whether there are interference effects or not. One of the problems is that an enrichment process is necessary before the determination process, and the second is the necessity of the separation process.…”
Ultrasound-assisted cloud point microextraction (UA-CPME) was performed for certain preservatives (p-hydroxy benzoic acid and its alkyl esters, methyl, ethyl, propyl and butyl paraben). Then, an HPLC method was developed for...
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