The Use of Solid Phase Microextraction (SPME) to Monitor for Major Organoleptic Compounds Produced by Chrysophytes in Surface Waters

1999 ◽  
Vol 40 (6) ◽  
pp. 251-256 ◽  
Author(s):  
Susan B. Watson ◽  
Brian Brownlee ◽  
Trevor Satchwill ◽  
E. McCauley
Keyword(s):  
Surface Waters ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Small Sample ◽  
Good Recovery ◽  
Culture Material ◽  
Treatment Facilities ◽  
Efficient Extraction ◽  
Cost Efficient ◽  
Related Compounds

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.

scholarly journals Nanocomposite Trimethylsilyl-Modified Nafion/SBA-15 for Extraction and Analysis of the Volatile Compounds from Nepeta haussknechtii Bornm

2021 ◽  
Vol 12 (1) ◽  
pp. 1237-1246
Keyword(s):  
Volatile Compounds ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Small Sample Size ◽  
Small Sample ◽  
Volatile Fraction ◽  
Extraction Temperature ◽  
Sample Weight ◽  
Humidity Effect ◽  
Experimental Parameters

Headspace solid-phase microextraction (HS-SPME) using a type of SBA-15 was made more hydrophobic by modification with ethoxy trimethyl silane to obtain a hybrid organicinorganic mesoporous nanocomposite, which then was impregnated with Nafion for the collection and detection of the volatile compounds of Nepeta haussknechtii Bornm. Experimental parameters, such as sample weight, extraction temperature, humidity effect, desorption time, and desorption temperature, were examined and optimized. Using HS-SPME followed by GC–MS, 42 compounds were separated and identified. HS-SPME has the benefits of small sample size, timesaving, cheapness, and simplicity, compared to hydrodistillation (HD). As we know, this is the first report on utilizing Nafion/SBA-15 fiber within solid-phase microextraction attached to headspace for assessing medicinal plant’s volatile fraction.

scholarly journals MICROEXTRAÇÃO EM FASE SÓLIDA: FUNDAMENTOS E APLICAÇÕES EM ANÁLISE DE ALIMENTOS

2003 ◽  
Vol 21 (1) ◽  
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
Keyword(s):  
Public Health ◽  
Gas Chromatography ◽  
Food Analysis ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Public Health Institutions ◽  
Efficient Extraction ◽  
Health Institutions ◽  
Solid Liquid

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.

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