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PubMed Journal Database | Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment RSS

07:42 EDT 1st May 2016 | BioPortfolio

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Showing PubMed Articles 1–25 of 306 from Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment

Corrigendum.

Evaluation of extraction methods for ochratoxin A detection in cocoa beans employing HPLC.

Cocoa is an important ingredient for the chocolate industry and for many food products. However, it is prone to contamination by ochratoxin A (OTA), which is highly toxic and potentially carcinogenic to humans. In this work, four different extraction methods were tested and compared based on their recoveries. The best protocol was established which involves an organic solvent-free extraction method for the detection of OTA in cocoa beans using 1% sodium hydrogen carbonate (NaHCO3) in water within 30 min. T...

Method development and survey of sudan I-IV in palm oil and chili spices in the Washington D.C. area.

Sudan I, II, III, and IV dyes are banned for use as food colorants in the United States (US) and European Union (EU) because they are toxic and carcinogenic. These dyes have been illegally used as food additives in products such as chili spices and palm oil to visually enhance their red color. From 2003-2005, the EU made a series of decisions requiring chili spices and palm oil imported to the EU to contain analytical reports declaring them free of sudan I-IV. In order for the FDA to investigate the adulter...

Identification of print related contaminants in food packaging.

Since the UV ink photoinitiator isopropylthioxanthone (ITX) was discovered in packaged milk, studies of print contamination have focused primarily on photoinitiators (PIs) but have also included amine synergists. Many other substances are used or formed during the print process, yet their identity and set-off properties have yet to be catalogued in food packaging. Three different techniques: Direct Analysis in Real Time High Resolution Mass Spectrometry (DART-HRMS), Gas Chromatography Mass Spectrometry (GC-...

An evaluation of extraction techniques for arsenic in staple diets (fish and rice) utilising both classical and enzymatic extraction methods.

Enzymatic extraction methods were evaluated with classical extraction approaches for the determination of arsenic in food. The extraction efficiency for total arsenic was determined by analysing CRM materials DORM-3 fish protein, NIES rice flour and GBW10015 spinach. These were compared with total arsenic concentration determined using microwave assisted acid digestion and ICP-MS. The total arsenic concentrations in the CRM materials were in good agreements with the certified values. Enzymatic hydrolysis us...

Target and non-target analysis of migrants from PVC-coated cans using UHPLC-Q-Orbitrap MS. Evaluation of long term migration testing.

A simple, rapid, and sensitive method for analyzing multi-target and non-target additives in polyvinyl chloride (PVC) food can coatings using ultra-high performance liquid chromatography coupled to quadrupole-orbital ion trap mass spectrometry has been developed. This procedure has been used to study the behavior of a cross-linking agent, benzoguanamine (BGA), two slip agents, oleamide and erucamide, and 18 other commonly-used plasticizers including phthalates, adipates, sebacates, acetyl tributyl citrate, ...

Analysis of saturated and aromatic hydrocarbons migrating from a polyolefin-based hot melt adhesive into food.

Hot melt adhesives are widely utilised to glue cardboard boxes used as food packaging material. They have to comply with the requirements of Article 3 of the European Framework Regulation for food contact materials (1935/2004). The hot melt raw materials analysed mainly consisted of paraffinic waxes, hydrocarbon resins and polyolefins. The hydrocarbon resins, functioning as tackifiers, were the predominant source of hydrocarbons of sufficient volatility to migrate into dry foods: the 18 hydrocarbon resins a...

Brominated, chlorinated and mixed brominated/chlorinated persistent organic pollutants in European eels (Anquilla anquilla) from Latvian lakes.

Fifty eight European eel (Anquilla anquilla) specimens collected from five Latvian lakes were investigated for six groups of persistent organic pollutants (POPs), including polychlorinated, polybrominated and mixed bromo-chloro dibenzo-p-dioxins and dibenzofurans (PCDD/DFs, PBDD/DFs and PXDD/DFs), polychlorinated and mixed bromo-chloro biphenyls (PCBs and PXBs) and polybrominated diphenyl ethers (PBDEs). PCDD/DFs and PCBs were found to occur in the range 0.85-15.8 pg Total-WHO2005-TEQ g(-1) f.w. and concen...

Determination of the aromatic hydrocarbon to total hydrocarbon ratio of mineral oil in commercial lubricants.

A method was developed to determine the aromatic hydrocarbon to total hydrocarbon ratio of mineral oil in commercial lubricants, and a survey was conducted of commercial lubricants. Hydrocarbons in lubricants were separated from the matrix components of lubricants using a silica gel SPE column. Normal phase liquid chromatography (NPLC) coupled with an evaporative light scattering detector (ELSD) was used to determine the aromatic hydrocarbon to total hydrocarbon ratio. Size exclusion chromatography (SEC) co...

Efficacy of water dispersible formulations of biological control strains of Aspergillus flavus for aflatoxin management in corn.

Field experiments were conducted in 2011 and 2012 to evaluate the efficacy of water dispersible granule (WDG) formulations of biocontrol strains of Aspergillus flavus in controlling aflatoxin contamination of corn. In 2011, when aflatoxin was present at very high levels, there was no WDG treatment which was able to provide significant protection against aflatoxin contamination. The following year a new WDG formulation was tested that resulted in 100% reduction in aflatoxin in one field experiment and ≥ 49...

Analysis of iodine in food samples by inductively-coupled plasma-mass spectrometry.

In this work, we show a method for the determination of iodine in a variety of food samples and reference materials using inductively coupled plasma mass spectrometry (ICP-MS) following alkaline extraction. Optimization of the addition of organic carbon showed that a minimum of 3% 2-propanol was necessary for a constant ratio of iodine to internal standard. The limit of quantification (LOQ), calculated as 30 for the method was 36 ng/g in solid food samples. For method validation, 7 standard reference...

Occurrence of 13 volatile organic compounds in foods from the Canadian total diet study.

Volatile organic compounds (VOCs) are ubiquitous in the environment due to evaporation and incomplete combustion of fuels, use of consumer and personal care products, etc. and they can accumulate in foods. Some VOCs in foods can also be formed during food processing and preparation and migrate from food packaging. In this pilot study, a GC-MS method based on headspace solid-phase microextraction (SPME) was validated and used to analyse selected individual foods which can be consumed directly and 153 differe...

Quantitative risk assessment on the dietary exposure of Finnish children and adults to nitrite.

Nitrite intake from consumption of cured meat and tap water was estimated for Finnish children of 1, 3 and 6 years as well as Finnish adults of 25 to 74 years. Nitrite content in the foods was measured by capillary electrophoresis, and was used together with individual food consumption data from FINDIET 2007 and DIPP studies in stochastic exposure assessment by Monte Carlo Risk Assessment program. Nitrite intake from additive sources and tap water was assessed, and more than every tenth child between the ...

Erratum.

Editorial Board.

Fumonisins B1 and B2 in the corn milling process and corn-based products and evaluation of the estimated daily intake.

The distribution of fumonisins in the corn milling process and in corn-based products, as well as daily intake estimates for the Brazilian population were evaluated. Among corn fractions samples, corn meal had the highest mean concentration of FB1 (1305 µg kg(-1)) and FB2 (651 µg kg(-1)) and a distribution factor of 452% and 256% in relation to corn grain, respectively. On the other hand, the distribution factor of FB1 and FB2 in corn flour was found to be 144% and 88%, which demonstrates that fumonis...

Spectrophotometric determination of low levels arsenic species in beverages after ion-pairing vortex-assisted cloud point extraction with acridine red.

In the present study, a new, low-cost, micellar sensitive and selective spectrophotometric method was developed for the determination of inorganic arsenic species in beverage samples. Vortex-assisted cloud point extraction (VA-CPE) was used for the efficient pre-concentration of As(V) in the selected samples. The method is based on selective and sensitive ion-pairing of As(V) with acridine red (ARH(+)) in the presence of pyrogallol and sequential extraction into the micellar phase of Triton X-45 at pH 6.0. ...

Micro-solid phase extraction (µ-SPE) of organophosphorous pesticides from wheat followed by LC-MS/MS determination.

A rapid, selective and effective method of extraction, clean-up and concentration of organophosphorous pesticides from wheat followed by electrospray (ESI) LC-MS/MS analysis has been developed. The μ-SPE (micro solid phase extraction) procedure resulted in good analytical performance reducing at the same time matrix effects, analysis time and solvent consumption. LODs (limits of detection) and LOQs (and limits of quantifications) were in the range of 0.3-10 and 1-30 μg kg(-1), respectively, with good repr...

Pesticide residues in leafy vegetables, stalk and stem vegetables from South Korea: a long-term study on safety and health risk assessment.

South Korea has a unique food culture. South Koreans enjoy wrapping meat and eating or making kimchi (traditionally fermented Korean food) and eating using raw leafy vegetables, stalk and stem vegetables. Therefore, there is a high chance of being exposed to pesticide residues of vegetables. The objective of this study was to investigate pesticide residues in leafy vegetables, stalk and stem vegetables from South Korea. A total of 8496 samples were mainly collected from Gwangju and Jeonnam area (the largest...

Reduction in pesticide residue levels in olives by ozonated and tap water treatments and their transfer into olive oil.

The effects of different wash times (2 and 5 min) with tap and ozonated water on the removal of 9 pesticides from olives and the transfer ratios of these pesticides during olive oil production were determined. The reliability of the analytical methods was also tested. The applied methods of analysis were found suitable based on linearity, trueness, repeatability, selectivity and limit of quantification for all the pesticides tested. All tap and ozonated water wash cycles removed a significant quantity of t...

Blood, breast milk and urine: potential biomarkers of exposure and estimated daily intake of ochratoxin A: a review.

The purposes of this review was to study potential biomarkers of exposure for ochratoxin A (OTA) in biological fluids (blood, urine and breast milk) for the period of 2005-2014, calculate the estimated daily intake (EDI) of OTA by using database consumption for the Spanish population and, finally to correlate OTA levels detected in blood and EDI values calculated from food products. The values of OTA detected in potential biomarkers of exposure for blood, breast milk and urine ranged from 0.15 to 18.0, from...

A review of the work of the EU Reference Laboratory supporting the authorisation process of feed additives in the EU.

This paper describes the operation of the European Union Reference Laboratory for feed additives (EURL) and its role in the authorisation procedure of feed additives in the EU. Feed additives are authorised according to Regulation (EC) 1831/2003, which introduced a completely revised authorisation procedure and also established the EURL. The Regulations authorising feed additives contain conditions of use such as legal limits of the feed additives, which require the availability of suitable method of analys...

Ecophysiology of Fusarium temperatum isolated from maize in Argentina.

The effect of water activity (aw: 0.95, 0.98, 0.995), temperature (15, 25 and 30°C), incubation time (7, 14, 21 and 28 days) and their interactions on growth and moniliformin (MON), beauvericin (BEA), fusaproliferin (FUS) and fumonisin B1 (FB1) production by two strains of Fusarium temperatum isolated from Argentinean maize were determined in vitro on sterile layers of maize grains. The results showed that there was a wide range of conditions for growth and mycotoxins production by F. temperatum. Both str...

An assessment of the migration potential of nanosilver from nanoparticle coated low density polyethylene food packaging into food simulants.

An experimental nanosilver coated low density polyethylene (LDPE) food packaging was incubated with food simulants using a conventional oven and tested for migration according to European Commission (2011) Regulation No. 10/2011. The commercial LDPE films were coated using a layer-by-layer (LbL) technique and three levels of silver (Ag) precursor concentration (0.5, 2 and 5% silver nitrate (AgNO3), respectively) were used to attach antimicrobial Ag. The experimental migration study conditions (time, tempera...

Dietary intake of non-nutritive sweeteners in Type 1 diabetes mellitus children.

The aims of the current cross-sectional study were i) to assess the intake of aspartame, cyclamate, acesulfame-k, neohesperidine dihydrochalcone, sucralose, saccharin, steviolglycosides and neotame among children with Type 1 Diabetes mellitus (T1D); ii) to compare the obtained intakes with the respective Acceptable Daily Intake (ADI) values and iii) to conduct a scenario analysis to obtain practical guidelines for a safe consumption of non-nutritive sweeteners (NNS) among children with T1D. Type 1 diabetic ...


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