Analytical Chemistry Research最新文献

Comparative sensing of aldehyde and ammonia vapours on synthetic polypyrrole-Sn(IV)arsenotungstate nanocomposite cation exchange material 合成聚吡咯-钨酸砷-锡纳米复合阳离子交换材料上醛、氨蒸气的比较传感

Analytical Chemistry Research Pub Date : 2017-06-01 DOI: 10.1016/j.ancr.2017.02.003

Asif Ali Khan , Rais Ahmad , Mohd. Zeeshan

{"title":"Comparative sensing of aldehyde and ammonia vapours on synthetic polypyrrole-Sn(IV)arsenotungstate nanocomposite cation exchange material","authors":"Asif Ali Khan , Rais Ahmad , Mohd. Zeeshan","doi":"10.1016/j.ancr.2017.02.003","DOIUrl":"10.1016/j.ancr.2017.02.003","url":null,"abstract":"<div>Polypyrrole-Sn(IV)arsenotungstate (PPy-SnAT) conductive nanocomposite cation exchange have been synthesized by in-situ chemical oxidative polymerization of polypyrrole with Sn(IV)arsenotungstate (SnAT). PPy-SnAT nanocomposite was characterized by Fourier transform infra-red spectroscopy (FTIR), X-Ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive x-ray (EDX) and thermogravimetric analysis (TGA). The ion exchange capacity (IEC) and DC electrical conductivity of nanocomposite was found to be 2.50 meq/g and 5.05 × 10−1 S/cm respectively. The nanocomposite showed appreciable isothermal stability in terms of DC electrical conductivity retention under ambient condition up to 130 °C. The nanocomposite cation exchange based sensor for detection of formaldehyde and ammonia vapours were fabricated at room temperature. It was revealed that the resistivity of the nanocomposite increases on exposure to higher percent concentration of ammonia and lower concentration of formaldehyde at room temperature (25 °C).</div>","PeriodicalId":7819,"journal":{"name":"Analytical Chemistry Research","volume":"12 ","pages":"Pages 52-64"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ancr.2017.02.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80942607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Preparation and characterization of a novel Co(II) optode based on polymer inclusion membrane 基于聚合物包合膜的新型Co(II)光电器件的制备与表征

Analytical Chemistry Research Pub Date : 2017-06-01 DOI: 10.1016/j.ancr.2017.02.001

Faiz Bukhari Mohd Suah

{"title":"Preparation and characterization of a novel Co(II) optode based on polymer inclusion membrane","authors":"Faiz Bukhari Mohd Suah","doi":"10.1016/j.ancr.2017.02.001","DOIUrl":"10.1016/j.ancr.2017.02.001","url":null,"abstract":"<div>A greener analytical procedure based on automated flow through system with an optical sensor is proposed for determination of Co(II). The flow through system consisted of polymer inclusion membrane (PIM) containing potassium thiocyanate (KSCN) that was placed between the measuring cell and fixed with optical sensor probe as an optical sensor for monitoring of Co(II) at 625 nm. In the presence of Co(II) ions, the colourless membrane changes to blue. The sensing membrane was prepared by incorporating SCN into a non plasticized PIM. The prepared PIM were found to be homogenous, transparent and mechanically stable. The optode shows reversible optical response in the range of 1.00 × 10−6 – 1.00 × 10−3 mol L−1 with detection limit of 6.10 × 10−7 mol L−1. The optode can be regenerated by using 0.1 mol L−1 of ethylenediaminetetraacetic acid (EDTA). The main parameters of the computer controlled flow system incorporating the flow-through optode, a multi-port selection valve and peristaltic pump were optimized too. The calculated Relative Standard Deviation (R.S.D) of the repeatability and reproducibility of the method are 0.76% and 4.73%, respectively. This green system has been applied to the determination of Co(II) in wastewater samples with reduced reagents and samples consumption and minimum waste generation.</div>","PeriodicalId":7819,"journal":{"name":"Analytical Chemistry Research","volume":"12 ","pages":"Pages 40-46"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ancr.2017.02.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73764682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22

Nano clay Ni/NiO nanocomposite new sorbent for separation and preconcentration dibenzothiophene from crude prior to UV–vis spectrophotometery determination 纳米粘土Ni/NiO纳米复合吸附剂用于原油中二苯并噻吩的分离和预富集

Analytical Chemistry Research Pub Date : 2017-06-01 DOI: 10.1016/j.ancr.2017.02.002

Amineh Mashkuri , Asma Saljooqi , Zeinab Tohidiyan

{"title":"Nano clay Ni/NiO nanocomposite new sorbent for separation and preconcentration dibenzothiophene from crude prior to UV–vis spectrophotometery determination","authors":"Amineh Mashkuri , Asma Saljooqi , Zeinab Tohidiyan","doi":"10.1016/j.ancr.2017.02.002","DOIUrl":"10.1016/j.ancr.2017.02.002","url":null,"abstract":"<div>In this work, Ni/Ni nanoparticles were immobilized on modified nanoclay then, the resultant nanocomposite was used as a sorbent for separation of dibenzothiophene. The concentration of dibenzothiophene was determined with UV–vis spectrophotometry at 287 nm. Different parameters affecting the separation of dibenzothiophene such as: the ratio of Ni/NiO nanoparticles to nanoclay, amounts of Ni/NiO nanoparticles and nanoclay, stirring time of dibenzothiophene solution on the sorbent, type of eluent, eluent volume, elution time, stirring time for preparing the sorbent were optimized. The obtained results were shown quantitative desorption of dibenzothiophene performed using ethanol as eluent. A linear concentration range of 0.5–15 mg/L was obtained with a detection limit of 0.047 mg/mL. The sorbent capacity was found to be 32 mg/g. Relative standard deviation was ±1.4 for six replicated determination of 5 mg/g of dibenzothiophene. The optimized procedure was successfully used for a crude oil sample.</div>","PeriodicalId":7819,"journal":{"name":"Analytical Chemistry Research","volume":"12 ","pages":"Pages 47-51"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ancr.2017.02.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81637862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Multivariate methods for analysis of environmental reference materials using laser-induced breakdown spectroscopy 用激光诱导击穿光谱分析环境标准物质的多变量方法

Analytical Chemistry Research Pub Date : 2017-06-01 DOI: 10.1016/j.ancr.2017.01.001

Shikha Awasthi , Rohit Kumar , Alamelu Devanathan , R. Acharya , A.K. Rai

{"title":"Multivariate methods for analysis of environmental reference materials using laser-induced breakdown spectroscopy","authors":"Shikha Awasthi , Rohit Kumar , Alamelu Devanathan , R. Acharya , A.K. Rai","doi":"10.1016/j.ancr.2017.01.001","DOIUrl":"10.1016/j.ancr.2017.01.001","url":null,"abstract":"<div>Analysis of emission from laser-induced plasma has a unique capability for quantifying the major and minor elements present in any type of samples under optimal analysis conditions. Chemometric techniques are very effective and reliable tools for quantification of multiple components in complex matrices. The feasibility of laser-induced breakdown spectroscopy (LIBS) in combination with multivariate analysis was investigated for the analysis of environmental reference materials (RMs). In the present work, different (Certified/Standard) Reference Materials of soil and plant origin were analyzed using LIBS and the presence of Al, Ca, Mg, Fe, K, Mn and Si were identified in the LIBS spectra of these materials. Multivariate statistical methods (Partial Least Square Regression and Partial Least Square Discriminant Analysis) were employed for quantitative analysis of the constituent elements using the LIBS spectral data. Calibration models were used to predict the concentrations of the different elements of test samples and subsequently, the concentrations were compared with certified concentrations to check the authenticity of models. The non-destructive analytical method namely Instrumental Neutron Activation Analysis (INAA) using high flux reactor neutrons and high resolution gamma-ray spectrometry was also used for intercomparison of results of two RMs by LIBS.</div>","PeriodicalId":7819,"journal":{"name":"Analytical Chemistry Research","volume":"12 ","pages":"Pages 10-16"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ancr.2017.01.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83477730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Characterization of methyl ester compound of biodiesel from industrial liquid waste of crude palm oil processing 棕榈油加工工业废液中生物柴油甲酯类化合物的表征

Analytical Chemistry Research Pub Date : 2017-06-01 DOI: 10.1016/j.ancr.2017.01.002

Maulidiyah, Muhammad Nurdin, Fetty Fatma, Muh. Natsir, Dwiprayogo Wibowo

引用次数: 54

A convenient colorimetric and ratiometric fluorescent probe for detection of cyanide based on BODIPY derivative in aqueous media 一种简便的基于BODIPY衍生物的比色和比例荧光探针，用于检测水介质中氰化物

Analytical Chemistry Research Pub Date : 2017-06-01 DOI: 10.1016/j.ancr.2017.01.004

Yanhua Yu , Tingting Shu , Changzhi Dong

{"title":"A convenient colorimetric and ratiometric fluorescent probe for detection of cyanide based on BODIPY derivative in aqueous media","authors":"Yanhua Yu , Tingting Shu , Changzhi Dong","doi":"10.1016/j.ancr.2017.01.004","DOIUrl":"10.1016/j.ancr.2017.01.004","url":null,"abstract":"<div>A convenient colorimetric and ratiometric fluorescent probe based on BODIPY derivative for cyanide detection has been synthesized, whose structural contains a dicyanovinyl group used as a sensing unit. Among the tested analytes, such as CN−, F−, Cl−, Br−, I−, ClO4−, AcO−, NO3−, H2PO4− HSO4−, S2− and N3−, only CN− could react with dicyanovinyl moiety by nucleophilic addition, which disrupted the π-conjugation of the probe and hindered the intramolecular charge transfer (ICT), leading a blue shift of absorption and fluorescence spectrum and a concomitant color change from yellow to light pink. The detection limit of this probe was calculated to be 0.98 μM, which is lower than the maximum concentration in drinking water (1.9 μM) permitted by the World Health Organization (WHO). Moreover, the probe showed excellent selectivity and anti-interference ability towards CN− over other anions. The reaction mechanism was fully supported by 1H NMR and MS spectrum.</div>","PeriodicalId":7819,"journal":{"name":"Analytical Chemistry Research","volume":"12 ","pages":"Pages 34-39"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ancr.2017.01.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87304546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Chemically modified carbon paste ion-selective electrodes for determination of atorvastatin calcium in pharmaceutical preparations 化学修饰碳糊离子选择电极测定药物制剂中阿托伐他汀钙

Analytical Chemistry Research Pub Date : 2017-06-01 DOI: 10.1016/j.ancr.2017.06.001

Salwa Fares Rassi

{"title":"Chemically modified carbon paste ion-selective electrodes for determination of atorvastatin calcium in pharmaceutical preparations","authors":"Salwa Fares Rassi","doi":"10.1016/j.ancr.2017.06.001","DOIUrl":"10.1016/j.ancr.2017.06.001","url":null,"abstract":"<div>A simple, rapid and sensitive method for the determination of atorvastatin calcium in pharmaceutical preparations using two modified carbon paste electrodes was developed. One electrode (sensor A) is based on ion-pair of atorvastatin with 5,6-diaminouracil hydrochloride (ATS-DAUH) and the other (sensor B) is based on atorvastatin with picric acid (ATS-PC). Among three different solvent mediators tested, dioctylphthalate (DOPH) exhibited a proper behavior including Nernstian slopes of the calibration curve at 58.76 ± 0.8 and 57.48±1 mV per decade for sensors A and B. The response times were 10 and 12 s, detection limits 1.3 × 10−6 and 2.2 × 10−6 M; the concentration range 2.5 × 10−6-7.9 × 10−2 M and 3.0 × 10−6 to 7.9 × 10−2 M respectively. The present electrodes show good discrimination of atorvastatin calcium from several inorganic, organic ions, sugars and some common excipients. The sensors were applied for the determination of atorvastatin calcium in pharmaceutical preparations using standard addition and the calibration curve methods. The results obtained were satisfactory with excellent percentage recovery comparable and sometimes better than those obtained by other routine methods for the assay. The proposed potentiometric methods offer the advantages of simplicity, accuracy, automation feasibility and applicability to turbid and colored sample solutions.</div>","PeriodicalId":7819,"journal":{"name":"Analytical Chemistry Research","volume":"12 ","pages":"Pages 65-73"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ancr.2017.06.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73633476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Structural identification and estimation of Rosuvastatin calcium related impurities in Rosuvastatin calcium tablet dosage form 瑞舒伐他汀钙片剂型中瑞舒伐他汀钙相关杂质的结构鉴定与评价

Analytical Chemistry Research Pub Date : 2017-06-01 DOI: 10.1016/j.ancr.2016.11.002

Chamarthi R.P. Kishore, G.V. Krishna Mohan

引用次数: 13

Sensors based on Ag-loaded hematite (α-Fe2O3) nanoparticles for methyl mercaptan detection at room temperature 基于载银赤铁矿(α-Fe2O3)纳米颗粒的室温甲基硫醇检测传感器

Analytical Chemistry Research Pub Date : 2017-06-01 DOI: 10.1016/j.ancr.2016.12.001

Daniel Garcia , Gino Picasso , Pilar Hidalgo , Henrique E.M. Peres , Rosario Sun Kou , Josué M. Gonçalves

{"title":"Sensors based on Ag-loaded hematite (α-Fe2O3) nanoparticles for methyl mercaptan detection at room temperature","authors":"Daniel Garcia , Gino Picasso , Pilar Hidalgo , Henrique E.M. Peres , Rosario Sun Kou , Josué M. Gonçalves","doi":"10.1016/j.ancr.2016.12.001","DOIUrl":"10.1016/j.ancr.2016.12.001","url":null,"abstract":"<div>Sensors based on Ag/α-Fe2O3 nanoparticles have been prepared by the coprecipitation method for sensing methyl mercaptan at room temperature. X-ray diffraction patterns of samples matched perfectly with characteristic peaks of hematite with no peaks assigned to Ag even at the highest concentration. STEM images and EDX analysis revealed the presence of Ag nanoparticles (from 2 to 5 nm) which were highly dispersed onto α-Fe2O3 surface with an Ag/Fe ratio from 0.014 to 0.099. The Ag nanoparticles were deposited on the hematite surface. Sensing tests of Ag-loaded hematite nanoparticles showed much higher response signal than the unmodified sensor. Hematite loaded with 3%(Wt) Ag showed the highest response with a linear dependence from 20 to 80 ppm. The sensor also depicted a good selectivity and stability during 4 days with short recovery time. The high dispersion of reduced Ag evaluated by XPS analysis played an important chemical role in the sensing mechanism that favored the contact of CH3SH with oxygen.</div>","PeriodicalId":7819,"journal":{"name":"Analytical Chemistry Research","volume":"12 ","pages":"Pages 74-81"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ancr.2016.12.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82788462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 36

An assessment of different extraction and quantification methods of penta- and hexa-chlorobenzene from SRF fly-ash SRF粉煤灰中五氯苯和六氯苯不同提取和定量方法的评价

Analytical Chemistry Research Pub Date : 2017-06-01 DOI: 10.1016/j.ancr.2017.01.003

Dimitris E. Balampanis, Frédéric Coulon, Nigel Simms, Philip Longhurst, Simon J.T. Pollard, Cecilia Fenech, Raffaella Villa

{"title":"An assessment of different extraction and quantification methods of penta- and hexa-chlorobenzene from SRF fly-ash","authors":"Dimitris E. Balampanis, Frédéric Coulon, Nigel Simms, Philip Longhurst, Simon J.T. Pollard, Cecilia Fenech, Raffaella Villa","doi":"10.1016/j.ancr.2017.01.003","DOIUrl":"10.1016/j.ancr.2017.01.003","url":null,"abstract":"<div>Highly chlorinated benzenes, produced in the presence of organic matter and chlorine, are considered PCDD/Fs precursors, and are used as cost and time convenient substitute indicators for the indirect measurement of the latter. In this study penta- and hexa-chlorobenzene are quantified for the determination of the organochloride load of fly ash from solid recovered fuel incineration. Some of the chlorobenzenes are formed under ‘de novo’ conditions, through heterogeneous (ash particles/flue gases) reactions and are therefore deeply incorporated within fly ash. Accelerated solvent extraction (ASE) and ultrasonic solvent extraction (USE), along with the equivalent clean-up methods suggested by literature were compared to traditional Soxhlet. The extraction efficiencies achieved were 83 ± 7.5% for Soxhlet, 111 ± 19% for PFE, and 67 ± 17% for ultrasonication. Soxhlet extraction and clean-up through a multilayer silica gel column gave more precise results compared to the other sample preparation methods. Furthermore, performance comparison of gas chromatography fitted with either a mass spectrometer operated in single ion monitoring mode (GC-MS-SIM), or electron capture detector (GC- ECD) highlighted that ECD can be used for measuring chlorobenzenes traces down to 0.21 ng g−1, when the equivalent LOQ for MS-SIM was 3.26 ng g−1. The results further suggest that ECD can provide better peak integration than MS-SIM in the detection of chlorobenzenes in fly ash extracts, due to the detector's sensitivity to halogenated compounds.</div>","PeriodicalId":7819,"journal":{"name":"Analytical Chemistry Research","volume":"12 ","pages":"Pages 28-33"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ancr.2017.01.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83357947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4