10 research outputs found
Fast UPLC/PDA determination of squalene in Sicilian P.D.O. pistachio from Bronte: optimization of oil extraction method and analytical characterization
A fast reversed-phase UPLC method was developed for squalene determination in Sicilian pistachio samples that entry in the European register of the products with P.D.O. In the present study the SPE procedure was optimized for the squalene extraction prior to the UPLC/PDA analysis. The precision of the full analytical procedure was satisfactory and the mean recoveries were 92.8 ± 0.3 % and 96.6 ± 0.1 % for 25 and 50 mg L-1 level of addition, respectively. Selected chromatographic conditions allowed a very fast squalene determination; in fact it was well separated in ∼ 0.54 min with good resolution. Squalene was detected in all the pistachio samples analyzed and the levels ranged from 55.45 to 226.34 mg . kg-1. Comparing our results with those of other studies it emerges that squalene contents in P.D.O. Sicilian pistachio samples, generally, were higher than those measured for other samples of different geographic origins
Toxic inorganic pollutants in foods from agricultural producing areas of Southern Italy: Level and risk assessment
This study focused on the inorganic environmental contaminants in specific food products which form part of the
food chain of the population residing in the area of Southern Italy (Gela) where there is a high mortality rate
linked to tumor diseases and congenital malformations. Determination of toxic metals was performed by
Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). The toxicological data for every toxic element has
been applied to evaluate the risk for the consumer by calculating the amount of potentially toxic element that
would ingest an average of 60 kg weight individual adult. The analysis of the investigated samples shows a high
level of metal contamination which can be linked both to the polluted water and air. The obtained results give us
an idea about the agricultural products contamination and possible exposure of local people through the food
chain
Toxic inorganic pollutants in foods from agricultural producing areas of Southern Italy: 2 level and risk assessment
This study focused on the inorganic environmental contaminants in specific food products which form part of the
food chain of the population residing in the area of Southern Italy (Gela) where there is a high mortality rate
linked to tumor diseases and congenital malformations. Determination of toxic metals was performed by
Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). The toxicological data for every toxic element has
been applied to evaluate the risk for the consumer by calculating the amount of potentially toxic element that
would ingest an average of 60 kg weight individual adult. The analysis of the investigated samples shows a high
level of metal contamination which can be linked both to the polluted water and air. The obtained results give us
an idea about the agricultural products contamination and possible exposure of local people through the food
chai
Multiple analytical approaches for the organic and inorganic characterization of Origanum vulgare L. samples
Origanum vulgare L. samples, marketed in different geographic locations, were characterized by their organic and inorganic chemical composition. A total of 35 commercial samples were collected from various sites and analyzed to determine the qualitative and quantitative profile of essential oils, phenolic compounds and some inorganic elements. The variation in the content and composition of the essential oil was assessed by GC and GC-MS analyses, the phenolic fraction was investigated by UPLCVR /PDA, and the inorganic elements were determined by ICP-MS. The Principal Component Analysis (PCA) was applied with the aim to sort out the Origanum vulgare L. samples with different composition according to the different belonging origins. The results showed appreciable qualitative and quantitative differences among samples from different geographic origin
Determination of Squalene in Organic Extra Virgin Olive Oils (EVOOs) by UPLC/PDA Using a Single-Step SPE Sample Preparation
In this paper, a simple extraction and fast detection procedure was used to determine squalene (SQ) in extra virgin
olive oils (EVOOs). SQ was purified from EVOOs by an efficient single-step solid phase extraction (SPE), and its content
was determined using an UPLC-PDA instrument. The adopted technique was evaluated for accuracy, linearity, sensitivity, and repeatability. The precision of the SPE extraction was satisfactory and the mean recoveries were 91.9 ± 0.4 and 96.3 ± 0.3 % for 25 and 50 mg L−1 level of addition, respectively. The selected chromatographic conditions allowed a very fast SQ determination; in fact, it was well separated in ∼0.54 min with good resolution. The UPLC method showed a good linearity in
the range 50–500 mg L−1 (R2 = 0.9998). Method sensitivity was evaluated by measuring the limits of detection (LOD) that
was 0.3 mg L−1. The method was utilized for SQ determination in 33 different organic EVOO samples, coming from different
countries (Turkey, Tunisia, Spain, Portugal, Greece, USA, Slovenia, Albania, Israel, Italy) and the data were statistically
evaluated