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:
Selected papers from the latest issue:
Trace Analysis of Acidic Pharmaceutical Residues in Waters with Isotope Dilution Gas Chromatography-Mass Spectrometry via Methylation Derivatization
05 July 2011, 21:33:46
Publication year: 2011
Source: Talanta, In Press, Accepted Manuscript, Available online 5 July 2011
Ruikang, Hu , Zhaoguang, Yang , Lifeng, Zhang
Acidic pharmaceutical residues are pollutants of emerging concern and are generally monitored by HPLC-MS/MS. However, due to the limited separation efficiency of HPLC column and lack of suitable mass transition for confirmation analysis, some interference may not be separated completely and differentiated from ibuprofen, which may cause the results with interference, especially in sample with complex matrix. The objective of this study is to develop a sensitive and reliable method for the determination of acidic pharmaceutical residues in water samples by GC-MS with better resolution by using methylation derivatization and isotope dilution techniques. TMSDM, a mild reagent, was used as...
Source: Talanta, In Press, Accepted Manuscript, Available online 5 July 2011
Ruikang, Hu , Zhaoguang, Yang , Lifeng, Zhang
Acidic pharmaceutical residues are pollutants of emerging concern and are generally monitored by HPLC-MS/MS. However, due to the limited separation efficiency of HPLC column and lack of suitable mass transition for confirmation analysis, some interference may not be separated completely and differentiated from ibuprofen, which may cause the results with interference, especially in sample with complex matrix. The objective of this study is to develop a sensitive and reliable method for the determination of acidic pharmaceutical residues in water samples by GC-MS with better resolution by using methylation derivatization and isotope dilution techniques. TMSDM, a mild reagent, was used as...
04 July 2011, 21:37:56
Publication year: 2011
Source: Talanta, In Press, Accepted Manuscript, Available online 3 July 2011
Marcos da Silva, Gomes , Dário Santos, Junior , Lidiane Cristina, Nunes , Gabriel Gustinelli Arantes de, Carvalho , Flávio de Oliveira, Leme , ...
It has been demonstrated that laser induced breakdown spectrometry (LIBS) can be used as an alternative method for the determination of macro (P, K, Ca, Mg) and micronutrients (B, Fe, Cu, Mn, Zn) in pellets of plant materials. However, information is required regarding the sample preparation for plant analysis by LIBS. In this work, methods involving cryogenic grinding and planetary ball milling were evaluated for leaves comminution before pellets preparation. The particle sizes were associated to chemical sample properties such as fiber and cellulose contents, as well as to pellets porosity and density. The pellets were ablated at 30 different...
Source: Talanta, In Press, Accepted Manuscript, Available online 3 July 2011
Marcos da Silva, Gomes , Dário Santos, Junior , Lidiane Cristina, Nunes , Gabriel Gustinelli Arantes de, Carvalho , Flávio de Oliveira, Leme , ...
It has been demonstrated that laser induced breakdown spectrometry (LIBS) can be used as an alternative method for the determination of macro (P, K, Ca, Mg) and micronutrients (B, Fe, Cu, Mn, Zn) in pellets of plant materials. However, information is required regarding the sample preparation for plant analysis by LIBS. In this work, methods involving cryogenic grinding and planetary ball milling were evaluated for leaves comminution before pellets preparation. The particle sizes were associated to chemical sample properties such as fiber and cellulose contents, as well as to pellets porosity and density. The pellets were ablated at 30 different...
Neutral Desorption Extractive Electrospray Ionization Mass Spectrometry for Fast Screening Sunscreen Agents in Cream Cosmetic Products
04 July 2011, 21:37:56
Publication year: 2011
Source: Talanta, In Press, Accepted Manuscript, Available online 3 July 2011
Xinglei, Zhang , Yan, Liu , Jinghua, Zhang , Zhong, Hu , Bin, Hu , ...
High throughput analysis of sunscreen agents present in cream cosmetic has been demonstrated, typically 2 samples per minute, using neutral desorption extractive electrospray ionization mass spectrometry (ND-EESI-MS) without sample pretreatment. For the targeted compounds such as 4-Aminobenzoic acid and oxybenzone, ND-EESI-MS method provided linear signal responses in the range of 1–100 ppb. Limits of detection (LOD) of the method were estimated at sub-ppb levels for the analytes tested. Reasonable relative standard deviation (RSD=8.4–16.0%) was obtained as a result of 10 independent measurements for commercial cosmetics samples spiked with each individual sunscreen agents at 1∼10 ppb. Acceptable recoveries were achieved in...
Source: Talanta, In Press, Accepted Manuscript, Available online 3 July 2011
Xinglei, Zhang , Yan, Liu , Jinghua, Zhang , Zhong, Hu , Bin, Hu , ...
High throughput analysis of sunscreen agents present in cream cosmetic has been demonstrated, typically 2 samples per minute, using neutral desorption extractive electrospray ionization mass spectrometry (ND-EESI-MS) without sample pretreatment. For the targeted compounds such as 4-Aminobenzoic acid and oxybenzone, ND-EESI-MS method provided linear signal responses in the range of 1–100 ppb. Limits of detection (LOD) of the method were estimated at sub-ppb levels for the analytes tested. Reasonable relative standard deviation (RSD=8.4–16.0%) was obtained as a result of 10 independent measurements for commercial cosmetics samples spiked with each individual sunscreen agents at 1∼10 ppb. Acceptable recoveries were achieved in...
Establishing the detection threshold for Bacillus subtilis in a complex matrix using an inorganic fingerprint approach
04 July 2011, 21:37:56
Publication year: 2011
Source: Talanta, In Press, Accepted Manuscript, Available online 3 July 2011
S.M., Lev , G., Gasparich , F., Choi , L., King , J., Moore , ...
Methods for the detection and characterization of airborne biological warfare agents, such as bacteria, using their DNA or organic composition are fairly well developed. This approach is useful for identifying the type of bacterial strain once the organism has been isolated from the matrix sampled (e.g., dust particles) and can identify genetically related organisms, which might be helpful during a forensic investigation. However, this genetic signature will not reveal information related to the methods used to grow and weaponize the organism. Bacteria will take on an inorganic signature that is related to their growth and processing history. Therefore, the ability...
Source: Talanta, In Press, Accepted Manuscript, Available online 3 July 2011
S.M., Lev , G., Gasparich , F., Choi , L., King , J., Moore , ...
Methods for the detection and characterization of airborne biological warfare agents, such as bacteria, using their DNA or organic composition are fairly well developed. This approach is useful for identifying the type of bacterial strain once the organism has been isolated from the matrix sampled (e.g., dust particles) and can identify genetically related organisms, which might be helpful during a forensic investigation. However, this genetic signature will not reveal information related to the methods used to grow and weaponize the organism. Bacteria will take on an inorganic signature that is related to their growth and processing history. Therefore, the ability...
Rationally designed molecularly imprinted polymers for selective extraction of methocarbamol from human plasma
04 July 2011, 21:37:56
Publication year: 2011
Source: Talanta, In Press, Accepted Manuscript, Available online 2 July 2011
Mohammad Bagher, Gholivand , Mehdi, Khodadadian
Molecularly imprinted polymers (MIPs) with high selectivity toward methocarbamol have been computationally designed and synthesized based on the general non-covalent molecular imprinting approach. A virtual library consisting of 18 functional monomers was built and possible interactions between the template and functional monomers were investigated using a semiempirical approach. The monomers with the highest binding scores were then considered for additional calculations using a more accurate quantum mechanical (QM) calculation exploiting the density functional theory (DFT) at B3LYP/6-31G(d,p) level. The cosmo polarizable continuum model (CPCM) was also used to simulate the polymerization solvent. On the basis of computational results, acrylic acid...
Source: Talanta, In Press, Accepted Manuscript, Available online 2 July 2011
Mohammad Bagher, Gholivand , Mehdi, Khodadadian
Molecularly imprinted polymers (MIPs) with high selectivity toward methocarbamol have been computationally designed and synthesized based on the general non-covalent molecular imprinting approach. A virtual library consisting of 18 functional monomers was built and possible interactions between the template and functional monomers were investigated using a semiempirical approach. The monomers with the highest binding scores were then considered for additional calculations using a more accurate quantum mechanical (QM) calculation exploiting the density functional theory (DFT) at B3LYP/6-31G(d,p) level. The cosmo polarizable continuum model (CPCM) was also used to simulate the polymerization solvent. On the basis of computational results, acrylic acid...
Acetylsalicylic acid electrochemical sensor based on PATP-AuNPs modified molecularly imprinted polymer film
04 July 2011, 21:37:56
Publication year: 2011
Source: Talanta, In Press, Accepted Manuscript, Available online 2 July 2011
Zhihua, Wang , Hui, Li , Jing, Chen , Zhonghua, Xue , Bowan, Wu , ...
A novel biosensor based on molecularly imprinted polymer film has been developed for aspirin detection. The sensitive film was prepared by co-polymerization of p-aminothiophenol (p-ATP) and HAuCl4 on the Au electrode surface. First, p-ATP was self-assembled on the Au electrode surface by the formation of Au-S bonds. Then, the acetylsalicylic acid (ASA) template was assembled onto the monolayer of p-ATP through the hydrogen-bonding interaction between amino group and oxygen of ASA. Finally, a conductive hybrid membrane was fabricated at the surface of Au electrode by the co-polymerization in the mixing solution containing additional p-ATP, HAuCl4 and ASA template. Meanwhile, the...
Source: Talanta, In Press, Accepted Manuscript, Available online 2 July 2011
Zhihua, Wang , Hui, Li , Jing, Chen , Zhonghua, Xue , Bowan, Wu , ...
A novel biosensor based on molecularly imprinted polymer film has been developed for aspirin detection. The sensitive film was prepared by co-polymerization of p-aminothiophenol (p-ATP) and HAuCl4 on the Au electrode surface. First, p-ATP was self-assembled on the Au electrode surface by the formation of Au-S bonds. Then, the acetylsalicylic acid (ASA) template was assembled onto the monolayer of p-ATP through the hydrogen-bonding interaction between amino group and oxygen of ASA. Finally, a conductive hybrid membrane was fabricated at the surface of Au electrode by the co-polymerization in the mixing solution containing additional p-ATP, HAuCl4 and ASA template. Meanwhile, the...
Facile synthesis of N-acetyl-L-cysteine capped ZnS quantum dots as an eco-friendly fluorescence sensor for Hg2+
04 July 2011, 21:37:56
Publication year: 2011
Source: Talanta, In Press, Accepted Manuscript, Available online 2 July 2011
Junling, Duan , Xiaochen, Jiang , Shouqing, Ni , Min, Yang , Jinhua, Zhan
This paper described an investigation of a novel eco-friendly fluorescence sensor for Hg2+ ions based on N-acetyl-L-cysteine (NAC)-capped ZnS quantum dots (QDs) in aqueous solution. By using safe and low-cost materials, ZnS QDs modified by NAC were easily synthesized in aqueous medium via a one-step method. The quantitative detection of Hg2+ ions was developed based on fluorescence quenching of ZnS QDs with high sensitivity and selectivity. Under optimal conditions, its response was linearly proportional to the concentration of Hg2+ ions in a range from 0 to 2.4×10−6molL−1 with a detection limit of 5.0×10−9molL−1. Most of common physiologically relevant cations and...
Source: Talanta, In Press, Accepted Manuscript, Available online 2 July 2011
Junling, Duan , Xiaochen, Jiang , Shouqing, Ni , Min, Yang , Jinhua, Zhan
This paper described an investigation of a novel eco-friendly fluorescence sensor for Hg2+ ions based on N-acetyl-L-cysteine (NAC)-capped ZnS quantum dots (QDs) in aqueous solution. By using safe and low-cost materials, ZnS QDs modified by NAC were easily synthesized in aqueous medium via a one-step method. The quantitative detection of Hg2+ ions was developed based on fluorescence quenching of ZnS QDs with high sensitivity and selectivity. Under optimal conditions, its response was linearly proportional to the concentration of Hg2+ ions in a range from 0 to 2.4×10−6molL−1 with a detection limit of 5.0×10−9molL−1. Most of common physiologically relevant cations and...
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