Showing papers by "Edoardo Mentasti published in 1998"
TL;DR: In this article, a speciation method was developed to study distribution of copper and manganese species in cow milk, based upon solid phase extraction of selective fractions of the analytes, followed by elution and determination by inductively coupled plasma-atomic emission spectrometry (ICP-AES), using it as a flow-injection detector.
71 citations
TL;DR: The study showed that the IIC equation predicted more accurately when few experimental data were available, while a similar prediction power was obtained with both models when the number of data was more than 17.
36 citations
TL;DR: In this article, a solid-phase extraction/slurry-sampling procedure was applied to inductively coupled plasma-atomic emission spectrometry (ICP-AES) detection.
33 citations
TL;DR: In this article, the distribution of minor and trace metals determined in water, algae, soil and sediment collected in different lakes in Antarctica, during the Italian Expedition in the austral summer 1993/94.
Abstract: This paper reports the distribution of minor and trace metals determined in water, algae, soil and sediment collected in different lakes in Antarctica, during the Italian Expedition in the austral summer 1993/94. The determination of the total concentration of the following metals was performed: Al, Ba, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, Sr, Zn. These have been determined in Carezza Lake (two temporally separate samplings) in Tarn Flat Lake and in Inexpressible Island Lake. The analytical results have been discussed with reference to their different meaning for matrices such as soil and sediment. Bivariate plots obtained with the factorial analysis for principal components have been obtained and discussed for lake water samples collected in the 1993/94 campaign and the previous ones (1989-1993). In addition a t-test correlation method showed that soil samples collected around the lakes and sediments sampled at the bottom of the lakes have equal composition with a coefficient correlation of 0.988 (95% confidence level).
12 citations
TL;DR: A review of the main results reached in the prediction of retention data of carboxylic acids, inferred by their chromatographic and electrophoretic behaviour, is presented.
10 citations
TL;DR: In this article, an ion interaction chromatographic method coupled to electrochemical detection was used for the separation and the determination of sulphonated azo ligands (SPADNS, Acid Alizarin Violet N and Plasmocorinth B) and their metal complexes.
8 citations
TL;DR: In this paper, the behavior of an electrochemical detector was studied as a function of mobile phase parameters especially in particular ch ro m at ographic mechanisms such as ion pair chromatography.
Abstract: Though this extensive use of electrochemical detection for applicative purposes, in no case in the current literature has the behaviour of an electrochemical detector been studied as a function of mobile phase parameters especially in partic ular ch ro m at ographic mechanisms such as ion pair ch romatography. The knowledge of such behaviour is important to optimise electrochemical detection after chromato graphic separation. Thus in this work several parameters related to analyte detection after HPLC separation, were investigated and the results obtained are r eported hereafter. In particular hy d roquinone was chosen as a re fe rence solute since its ch ro m at ographic retention and re d ox mechanism are we l l known. The paper consists of two sections. In the first one (detec tor characterisation) the behaviour and performance of the detector are described: the results obtained can be of prac tical use in order to esta blish the operative conditions also for the detection of other analytes. The second section (bulk and flow electrolysis) deals with the ef fect of flow rate on the ch ro m at ographic signal. The process occurring in the detector cell in the presence of an electroacti ve species is actually an electrolysis. Therefore, starting from the theory of bulk and fl ow electro ly s i s , a model for predicting the detector response as a function of eluent f l ow rate wa s applied and its agreement with ex p e rimental results wa s compared.