Electromembrane surrounded solid phase microextraction: A novel approach for efficient extraction from complicated matrices

2013 ◽  
Vol 1280 ◽  
pp. 16-22 ◽  
Author(s):  
Maryam Rezazadeh ◽  
Yadollah Yamini ◽  
Shahram Seidi ◽  
Behnam Ebrahimpour
1999 ◽  
Vol 40 (6) ◽  
pp. 251-256 ◽  
Author(s):  
Susan B. Watson ◽  
Brian Brownlee ◽  
Trevor Satchwill ◽  
E. McCauley

An efficient extraction method is needed to measure trace levels of taste and odour compounds in surface waters. This is usually accomplished by costly and involved analytical procedures. We have developed a simpler alternative, using a commercially available microextraction apparatus (SPME). With this technique we successfully monitored trace levels of some target organoleptics (unsaturated aldehydes e.g. heptadienal, nonadienal, and related compounds) which commonly cause aquatic taste and odour. We identified these compounds in culture material, and analyzed for them during the development of odourous chrysophyte blooms in two ponds. Preliminary work has also found a good recovery of some important off-flavour terpenoids (e.g. geosmin and MIB). SPME is labour and cost efficient, and therefore appealing to water treatment facilities for detection and monitoring. In addition, SPME requires only small sample volumes, and is therefore suitable for culture work.


Author(s):  
LEILA MARTINS DA COSTA QUINTEIRO ◽  
ANA LÚCIA DA ROCHA NOBRE ◽  
AURÉLIO BAIRD BUARQUE FERREIRA ◽  
RONOEL LUIZ DE OLIVEIRA GODOY ◽  
IZABELA MIRANDA DE CASTRO

No presente trabalho são apresentados os principais aspectos teóricos, funcionais e analíticos, da Microextração em Fase Sólida (MEFS), dedicando-se um tópico especial para sua aplicação em análise de alimentos. São descritas as principais características da instrumentação, das etapas de extração e das formas operacionais. Mostra-se o desenvolvimento de método de análise por MEFS aliado à cromatografia a gás (CG) e algumas aplicações em análise de alimentos, sendo discutidas as principais vantagens oferecidas pela técnica. Concluiu-se que a MEFS permite a extração, sem o uso de solventes, e a determinação de uma série de substâncias de matrizes sólidas, líquidas ou gasosas de modo prático e eficiente. O uso crescente de MEFS-CG na detecção de fraudes, adulterações e contaminações de alimentos interessa aos órgãos fiscais responsáveis pela saúde pública. SOLID PHASE MICROEXTRACTION: FUNDAMENTALS AND APPLICATIONS IN FOOD ANALYSIS Abstract In this work, the most important aspects, analytical, theoretical and functional, of Solid Phase Microextraction (SPME) are presented, with a special emphasis in food analysis applications. The main features instrumentation of extraction stages and of operational procedures are described. Furthermore, development of the analytical method employing SPME with gas chromatography (GC) and some applications to food analysis and the advantages offered by this technique are discussed. SPME is seen to provide practical and efficient extraction without solvent as well as the determination of many compounds contained in solid, liquid or gas matrices. The use of SPME-GC methods for detection of fraud, adulteration and contamination of food has been increased, and is of interest to the official public health institutions.


2018 ◽  
Vol 42 (12) ◽  
pp. 9935-9944 ◽  
Author(s):  
Hamid Asiabi ◽  
Yadollah Yamini ◽  
Maryam Shamsayei

Cobalt/chromium-layered double hydroxide (Co/Cr (NO3−)-LDH) nano-sheets were employed as a packed in-tube solid phase microextraction sorbent for efficient extraction of acidic pesticides from water samples.


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