Madridge Journal of Analytical Sciences and Instrumentation最新文献

Elemental Analysis of Indian Coffee Powder Samples using Hand Held X-Ray Fluorescence Spectrometer 手持式x射线荧光光谱仪分析印度咖啡粉样品的元素

Madridge Journal of Analytical Sciences and Instrumentation Pub Date : 2019-08-30 DOI: 10.18689/mjai-1000120

M. Denni, D. Joseph

{"title":"Elemental Analysis of Indian Coffee Powder Samples using Hand Held X-Ray Fluorescence Spectrometer","authors":"M. Denni, D. Joseph","doi":"10.18689/mjai-1000120","DOIUrl":"https://doi.org/10.18689/mjai-1000120","url":null,"abstract":"Elemental composition of ten samples of instant and roasted ground coffee powders available in markets of India have been analyzed using X-ray fluorescence technique. The samples were analyzed for thirty one elements, out of which major elements were K and Ca. Al, Fe, Ni, Mg, Mn, Sb, Sn and Zn were observed to be present in the smaller quantities. Nonmetals such as S, P and Si were detected in almost all the samples. The samples also showed presence of rare earth metals like W, Zr, Y, Ag, Sr, Rb, Nb and Mo. Toxic metals like Hg and As were not detected in any of the samples, while traces of Cd and Pb were found to be present in four samples each. With the absence of toxic elements coffee can be considered a safe beverage. Detection of radioactive elements U and Th in the coffee samples is an important finding of this research work. Results of elemental analysis of the analyzed coffee samples were correlated to the soil analysis data of their geographical origins. There have been good correlations between elements reported in the soil and those detected in the coffee samples. The motive of the research work is to bring out the goodness of coffee in terms of their elemental composition and also their variation with regard to their geographical origin.","PeriodicalId":431351,"journal":{"name":"Madridge Journal of Analytical Sciences and Instrumentation","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123680655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Approaches for Sample Characterization and Lithography with Nanoparticles using Modes of Scanning Probe Microscopy 扫描探针显微镜下纳米颗粒样品表征和光刻方法研究

Madridge Journal of Analytical Sciences and Instrumentation Pub Date : 2019-06-10 DOI: 10.18689/mjai-1000119

J. Garno, T. Jegede, Kathryn B. Mckee, M. Porter, Autumn E Webb, Jinlin Lee, Neepa M. K. Kuruppu Arachchige, Justin R. Ragains, Noémie Elgrishi

引用次数: 0

Chemichal Caracterisation of Essential Oil for Saturea Montana Population from Burreli Area, Albania 阿尔巴尼亚Burreli地区蒙大拿州人口挥发油的化学特征

Madridge Journal of Analytical Sciences and Instrumentation Pub Date : 2018-09-27 DOI: 10.18689/mjai-1000117

J. Salihila, A. Nuro

引用次数: 0

Stability Indicating New-UPLC Method for Determination of Dimethyl Fumarate in their Pure and Capsule Dosage Form 测定富马酸二甲酯纯剂型和胶囊剂型的新型高效液相色谱法

Madridge Journal of Analytical Sciences and Instrumentation Pub Date : 2018-09-22 DOI: 10.18689/mjai-1000116

M. Mohamed

引用次数: 3

An overview of Organic Pollutants in Water Ecosystems of Albania 阿尔巴尼亚水生态系统中有机污染物的概述

Madridge Journal of Analytical Sciences and Instrumentation Pub Date : 2018-06-16 DOI: 10.18689/MJAI-1000115

A. Nuro, E. Marku, B. Murtaj

{"title":"An overview of Organic Pollutants in Water Ecosystems of Albania","authors":"A. Nuro, E. Marku, B. Murtaj","doi":"10.18689/MJAI-1000115","DOIUrl":"https://doi.org/10.18689/MJAI-1000115","url":null,"abstract":"Data about concentrations of some organic pollutants in several important water ecosystems of Albania are represented in this article. Water samples collected in three stations of Adriatic Sea (Vlora Bay, Port of Durres and Porto-Romano), two well-known Albanian lagoons (Karavasta and Patoku lagoons) and four rivers (Semani, Shkumbini, Erzeni and Mati rivers) were analyzed for following organic pollutants, Lindane and its isomers (a-HCH, b-HCH, Lindane, d-HCH and e-HCH), DDT and its metabolites (DDE, DDD and DDT), polychlorinated biphenyls (7 PCB markers), polyaromatic hydrocarbons (13 PAH based on EPA 525) and BTEX(Benzene, Toluene, o-, mand p-Xylenes).The data has been collected for a two year period, March 2014 to April 2016. The results of the chemical analysis show that the samples of Semani River, Adriatic Sea and Shkumbini River have the highest concentrations of organochlorine pesticides (HCHs and DDTs). The cause of HCHs and DDTs presenceincludes their previous agricultural use, new incomes from erosion process and their degradation processes. Higher concentration values of volatile PCBs are related with their atmospheric deposition origin. Relatively high concentrations of Benzene, Toluene and volatile PAH compounds were detected in water samples of Port of Durres and Porto-Romano. The presence of hydrocarbonesis influenced by ships transport, discharges of wastesfrom the ships, local automobilist transport, etc. Also, higher concentration hydrocarbons were found in Semani River and Karavasta lagoon, because of extracting and processing of oil factories which operate in this area.","PeriodicalId":431351,"journal":{"name":"Madridge Journal of Analytical Sciences and Instrumentation","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134213496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Elemental Detection of Zinc in Ayurvedic Drug (Jasad Bhasma) by Radioisotope induced Energy Dispersive X-ray Fluorescence (EDXRF) Technique 放射性同位素诱导能量色散x射线荧光(EDXRF)技术检测阿育吠陀药(Jasad Bhasma)中锌元素

Madridge Journal of Analytical Sciences and Instrumentation Pub Date : 2018-06-06 DOI: 10.18689/MJAI-1000114

D. Joseph

引用次数: 1

A New Molybdate-selective electrode based on Higher quaternary Ammonium Salts 基于高季铵盐的钼酸盐选择性电极

Madridge Journal of Analytical Sciences and Instrumentation Pub Date : 2018-05-30 DOI: 10.18689/mjai-1000113

Y. Matveichuk

{"title":"A New Molybdate-selective electrode based on Higher quaternary Ammonium Salts","authors":"Y. Matveichuk","doi":"10.18689/mjai-1000113","DOIUrl":"https://doi.org/10.18689/mjai-1000113","url":null,"abstract":"Membrane composition of molybdate-selective electrodes based on higher quaternary ammonium salts has been optimized. It is found that the best analytical characteristics of electrodes are based on 3,4,5-tris-dodecyloxybenzyl) tetraoxyethyltrimethyl ammonium in chloride form (5% w/w) with the addition in membranes of the solvating additive (neutral carrier) − p-heptyl ester 4-trifluoroacetylbenzoic acid (TFABAHE, 20% w/w). Their analytical characteristics: low detection limits (1·10−6mol/l); logarithm selectivity coefficients relative to interfering chloride -1,-4, sulfate -0.8, bromide -0.7, tungstate -0.9 ions; working range of pH (8.5−9.5); slope of the electrode function (24.4 mV/decade) are determined. Sodium molybdate aqueous solutions has been studied with FT-IR spectrometry method at various pH. In sodium molybdate solutions at pH greater than 8.0‒8.5 hydrolytic processes are mild. However, using a molybdate-selective electrodes is better to use freshly prepared solutions. This increases the reproducibility of the experimental results. The proposed electrode was employed to determine of molybdate ions of model water samples using the calibration plot method.","PeriodicalId":431351,"journal":{"name":"Madridge Journal of Analytical Sciences and Instrumentation","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126507028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0