The aim of this work was the evaluation QuEChERS extraction method for polycyclic aromatic hydrocarbon (PAH) determination in various types tea. In experiment, different kinds solvents, sorbents and a final sample preparation were compared. extracts analysed by gas chromatography-selected ion monitoring-mass spectrometry. results suggest that acetonitrile extraction, clean up with SAX liquid–liquid best combination giving most purified acceptable compound recoveries teas. study real samples,...

The aim of this study was to evaluate the application quick, easy, cheap, effective, rugged and safe method for simultaneous determination polycyclic aromatic hydrocarbons pesticide residues in fresh herbs. In experiment two extraction solvents standard types sorbents were used. extracts analyzed using GC-SIM-MS. results suggest that acetonitrile is more suitable solvent giving purified samples better recovery values (71.6 %-116.9 %) with RSD lower than 15 % most compounds. real pesticides...

This paper reports the evaluation of Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) method for determination polycyclic aromatic hydrocarbons (PAHs) in food animal origin with GC–MS detection. Although available literature, there is a lot information about sample preparation PAHs samples, but QuEChERS application has not been reported as yet. The results showed that best recovery ratios 72.4–110.8 % relative standard deviation lower than 10 all determined compounds were received...

The aim of this investigation was to determine odorous compounds in the air over landfill sites France and Poland. Air samples were collected by passive dynamic methods preconcentration analytes analysed GC-MS GC-FID. coupling microTD-microGC-MS also used for on-site analysis compounds. achieved results indicated that concentrations odorants varied strongly depended on sampling site. highest observed at points situated near biogas wells above fresh waste layer. influenced activities such as...

The purpose of this study was to evaluate the application dispersive solid-phase extraction with use primary secondary amine (PSA), NH2 and strong anion exchange (SAX) sorbents for polycyclic aromatic hydrocarbon (PAH) determination in samples coffee. final extracts were analysed by gas chromatography selected ion monitoring mass spectroscopy (GC-SIM-MS). results indicated that cleanup PSA SAX followed solvent from acetonitrile hexane (liquid–liquid extraction, LLE) best variant method,...

The paper reports the levels of thermal processing contaminants such as polycyclic aromatic hydrocarbons (PAHs), 3-monochloropropane-1,2-diol (3-MCPD) and acrylamide (AA) in 28 dried (raisins, dates, apricots, cranberries plums—prunes) 15 smoked (pears, apples plums) fruit samples from Polish retail market. Analytes were determined using GC–SIM–MS, after being subjected to modified QuEChERS method. results showed that almost all PAHs detected samples, except dibenzo(a,h)anthracene, which was...

In the present study, a simultaneous sample preparation method for determination of 3-monochloropropane-1,2-diol (3-MCPD) and polycyclic aromatic hydrocarbons (PAHs) in different foodstuffs has been evaluated. Sample procedure involved acetonitrile extraction/partitioning cleanup by dispersive solid phase extraction with final detection gas chromatography coupled mass spectrometry. The experiment demonstrated that freezing out extracts prior to (d-SPE) step gave better results removal...

Honey is consumed worldwide because of its nutritional, therapeutic and medicinal properties. Generally, honey should reach the consumer in a pure form, but it often contaminated various ways. Thus, this study was designed to check for presence pesticide residues, polycyclic aromatic hydrocarbon (PAH) levels, content 5-hydroxymethylfurfural (HMF) selected European honeys (26 samples) obtained from shops. The most frequently detected organochlorine (OCPs) 4,4'-DDD, which found fourteen...

A new simplified QuEChERS method, with the use of PSA sorbent and without addition magnesium sulphate, was established for determination 3-monochloropropane-1,2-diol (3-MCPD) in coffee substitutes. The final extracts were derivatised phenylboronic acid analysed by gas chromatography-mass spectrometry. recoveries ranges 90.5–107 % all types. calculated limit detection 2.5 μg kg−1 linearity within range 2–200 ng mL−1. In real samples highest level 3-MCPD detected soluble surrogates (average...

This paper reports the development of a rapid and simple sample preparation method for acrylamide (AA) determination in cocoa powder through conversion to <italic>N</italic>,<italic>O</italic>-bis(trimethylsilyl)acrylamide.

The vegetable fats that are added to chocolate may contain monochloropropanediol esters (MCPDE) and glycidyl (GE). Therefore, the main goal of this work was assess ester levels in 62 samples chocolates using a modified sample preparation approach. optimisation experiments were performed as part study showed combination fat extraction incorporation bulk aminopropyl (NH2) sorbent facilitated process. In case analysis available on market, only four did not any esters. highest amount 3-MCPDE,...

Shortbread biscuits have become one of the most desirable snacks in all population groups but due to its high fat content it is searching for new solutions reduction such as use carbohydrate-based mimetics. However, thermal processing food containing lipids presence certain carbohydrates can contribute formation toxic compounds or alter levels. Therefore, aim study was evaluate inulin and pectin gels partial replacers (10-40%) classical shortbread a view changes 3-monochloropropane-1,2-diol...

Dietary supplements based on fish oils might be contaminated with thermal processing contaminants, which are generated during the oil deodorisation. In study, 30 samples of dietary were analysed in terms occurrence 3-monochloropropane-1,2-diol esters (3-MCPDE), 2-monochloropropane-1,3-diol (2-MCPDE) and glycidyl (GE). The results showed that highest levels 3-MCPDE (mean: 1461 µg kg-1) as well 2-MCPDE 357 observed products containing shark liver oil. case GE, they mainly detected including...

The aim of the present investigation was to determine time variation biogas composition at gas collection network on 'Barycz' landfill site in Cracow, Poland, as well influence operational and meteorological conditions composition. study selected wells collectors conducted using a portable IR analyser. methane concentration part currently operation varied range 59-63% vol. reclaimed landfill, 42-62% It found that is significantly affected by parameters. For example, concentrations were more...

The effect of the addition selected flavour enhancers (dried garlic, dried onion, caraway seeds, poppy kelp, sesame, Herbs de Provence) on levels chloropropanediol esters (2-MCPDE, 3-MCPDE) and glycidyl (GE) was investigated in classic savoury shortbread with standard reduced salt level. changes amount after a 2-month storage period were also analysed. Finally, products level evaluated by consumers. obtained results suggested that MCPDE GE present bakery fat transferred to dough partially...

The effect of the addition six sweeteners (erythritol, xylitol, maltitol, sucrose, steviol sweetener, and stevia leaves) on formation 3-monochloropropane-1,2-diol (3-MCPD) 3-MCPD esters in glycerol shortbread model systems subjected to heat treatment was investigated. highest level free reached for system with sweetener (114.8 μg kg−1), contrast leaves (51.9 kg−1). roughly similar, whilst levels esterified were about 12 times higher. maximum content obtained sucrose (1112 kg−1) lowest...