Just Published: Analytica Chimica Acta

A new issue of this journal has just been published. To see abstracts of the papers it contains (with links through to the full papers) click here:

Analytica Chimica Acta
http://rss.sciencedirect.com/publication/science/5216

Selected papers from the latest issue:

1.

Determination of polycyclic and nitro musks in environmental water samples by means of microextraction by packed sorbents coupled to large volume injection gas chromatography-mass spectrometry analysis   Original Research Article Available online 1 March 2013 J. Cavalheiro, A. Prieto, M. Monperrus, N. Etxebarria, O. Zuloaga Graphical abstract Highlights ► We developed a fully automated at-line MEPS-LVI-GC-MS method for musks analysis. ► The analytes were detected in the ng/L range. ► The time for a MEPS extraction is reduced to ∼10min due to the high automation. ► Less matrix co-extraction was of special value for analysis of wastewater samples. ► SBSE vs. MEPS were compared and good agreement obtained except for DPMI analysis.

2.

Highly Sensitive Detection of Urinary Cadmium to Assess Personal Exposure   Original Research Article Available online 1 March 2013 Avni A. Argun, Ashley Banks, Gwendolynne Merlen, Linda A. Tempelman, Michael F. Becker, Thomas Schuelke, Badawi Dweik Graphical abstract Highlights ► An electrochemical sensor capable of detecting cadmium at parts-per-billion levels in urine. ► A novel fabrication method for Boron-Doped Diamond (BDD) ultramicroelectrode (UME) arrays. ► Unique combination of BDD arrays and a differential pulse voltammetry algorithm. ► High sensitivity, high reproducibility, and very low (nanoampere) noise levels. ► Opportunity for portable operation to assess on-site personal exposure.

3.

Quantitative Analysis of Differentially Expressed Saliva Proteins in Human Immunodeficiency Virus Type 1 (HIV-1) Infected Individuals   Original Research Article Available online 1 March 2013 Nawei Zhang, Zhenyu Zhang, Shan Feng, Qingtao Wang, Daniel Malamud, Haiteng Deng Graphical abstract Highlights ► developed a high-throughput method for profiling and quantification of the differentially expressed proteins in saliva samples. ► identified that DMBT1, S100A7, S100A8, S100A9 and alpha defensin were up-regulated in saliva from HIV-1 seropositive patients. ► Established analytical strategies are translatable to the clinical setting.

4.

Quantitative Detection of Well-Based DNA Array Using Switchable Lanthanide Luminescence   Original Research Article Available online 28 February 2013 Ulla Karhunen, Minna Soikkeli, Susanne Lahdenperä, Tero Soukka Graphical abstract Highlights ► Oligonucleotide hybridization switches on lanthanide luminescence. ► The binary probe technology enables wash-free nucleic acid array. ► Detection of both synthetic targets and PCR-amplifiedE. coliDNA is demonstrated.

5.

Relative quantification of enantiomers of chiral amines by high-throughput LC-ESI-MS/MS using isotopic variants of light and heavy L-pyroglutamic acids as the derivatization reagents   Original Research Article Available online 28 February 2013 Toshiki Mochizuki, Sayuri Taniguchi, Haruhito Tsutsui, Jun Zhe Min, Koichi Inoue, Kenichiro Todoroki, Toshimasa Toyo’oka Graphical abstract Highlights ► Development of chiral labeling reagent for a pair of amine enantiomers. ► High-throughput analysis of diastereomers by UPLC-ESI-MS/MS. ► Highly efficient separation and detection of the enantiomers. ► Differential analysis of enantiomer ratio in different sample groups using light and heavy labeling reagents.

6.

One-way and two-way pulsed electromembrane extraction for trace analysis of amino acids in foods and biological samples   Original Research Article Available online 28 February 2013 Maryam Rezazadeh, Yadollah Yamini, Shahram Seidi, Ali Esrafili Graphical abstract Pulsed electromembrane extraction was performed for the first time, as a new concept of electrically enhanced microextraction method, for extraction and quantification of histidine, phenylalanine and tryptophan in different matrices. Highlights ► Pulsed electromembrane extraction (PEME) was used for extraction of some amino acids. ► A mixture of NPOE and DEHP was used as the organic liquid membrane. ► The method offers good linearity with correlation coefficient higher than 0.9979. ► The method was applied to determine amino acids in foods and biological samples. ► Two-way PEME was employed for highly selective extraction of tryptophan.

7.

The challenge of identifying non-intentionally added substances (nias) from food packaging materials: a review   Review Article Available online 28 February 2013 C. Nerin, P. Alfaro, M. Aznar, C. Domeño Graphical abstract Highlights ► Non intentionally added substances (NIAS) are frequently present in packaged food. ► In-depth review about the different NIAS origin is described. ► An analytical approach for sample treatment and NIAS identification is suggested. ► The analytical approach selected dictates which NIAS are identified. ► A risk assessment protocol for identified NIAS is presented.

8.

Peptides trapping cocaine: docking simulation and experimental screening by SPE-LC-MS/MS in plasma samples   Original Research Article Available online 28 February 2013 Mascini Marcello, Montesano Camilla, Sergi Manuel, Perez German, De Cicco Maristella, Curini Roberta, Compagnone Dario Graphical abstract Highlights ► Two peptides were computationally designed as selective SPE sorbent for cocaine. ► The hexapeptide-cocaine complex was docked with different scoring functions. ► The extraction procedure for SPE was optimized for human plasma. ► QHWWDW was found to have the highest recovery in agreement with docking simulation.

9.

Fabrication and application of a new modified electrochemical sensor using nano-silica and a newly synthesized Schiff base for simultaneous determination of Cd2+, Cu2+ and Hg2+ ions in water and some foodstuff samples   Original Research Article Available online 27 February 2013 Abbas Afkhami, FarzanehSoltani-Felehgari, Tayyebeh Madrakian, Hamed Ghaedi, Majid Rezaeivala Graphical abstract Highlights ► A new modified electrochemical sensor was constructed and used. ► A new Schiff base coated nano-silica was used as modifier. ► The electrochemical properties of electrode were studied. ► This modifier enhanced the electrochemical properties of electrode. ► The electrode was used for simultaneous determination of Cd2+, Cu2+and Hg2+ions.