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European Journal of Mass Spectrometry最新文献

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Separation, identification and characterization of stress degradation products of bortezomib using HPLC and LC-MS. 硼替佐米应力降解产物的HPLC和LC-MS分离鉴定及表征。
IF 1.3 4区 化学
European Journal of Mass Spectrometry Pub Date : 2021-04-01 Epub Date: 2021-04-07 DOI: 10.1177/14690667211006246
C Purushotham Reddy, K Ramakrishna, Kmv Narayana Rao
{"title":"Separation, identification and characterization of stress degradation products of bortezomib using HPLC and LC-MS.","authors":"C Purushotham Reddy,&nbsp;K Ramakrishna,&nbsp;Kmv Narayana Rao","doi":"10.1177/14690667211006246","DOIUrl":"https://doi.org/10.1177/14690667211006246","url":null,"abstract":"<p><p>Bortezomib (BT) is a reversible inhibitor of proteasome which is used in the treatment of hematological cancers. To study the degradation behavior, BT was subjected to acidic, basic, neutral, photolytic, oxidative and thermal degradation conditions as per ICH guideline Q1A (R2). A gradient HPLC method has been developed for separating all the degradation products formed under various degradation conditions on Waters XBridge C<sub>18</sub> column (150 mm × 4.6 mm × 3.5 µm) using the mobile phase composed of ammonium formate and acetonitrile. A total of six degradation products were formed in various stress conditions and these were separated identified, and characterized using high performance liquid chromatography in combination with electrospray ionization tandem mass spectrometric studies.</p>","PeriodicalId":12007,"journal":{"name":"European Journal of Mass Spectrometry","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/14690667211006246","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25570631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Identification of newly formed toxic chemicals in E-cigarette aerosols with Orbitrap mass spectrometry and implications on E-cigarette control. Orbitrap质谱法鉴定电子烟气溶胶中新形成的有毒化学物质及其对电子烟控制的影响。
IF 1.3 4区 化学
European Journal of Mass Spectrometry Pub Date : 2021-04-01 Epub Date: 2021-08-27 DOI: 10.1177/14690667211040207
Beizhan Yan, Dimitri Zagorevski, Vesna Ilievski, Norman J Kleiman, Diane B Re, Ana Navas-Acien, Markus Hilpert
{"title":"Identification of newly formed toxic chemicals in E-cigarette aerosols with Orbitrap mass spectrometry and implications on E-cigarette control.","authors":"Beizhan Yan,&nbsp;Dimitri Zagorevski,&nbsp;Vesna Ilievski,&nbsp;Norman J Kleiman,&nbsp;Diane B Re,&nbsp;Ana Navas-Acien,&nbsp;Markus Hilpert","doi":"10.1177/14690667211040207","DOIUrl":"https://doi.org/10.1177/14690667211040207","url":null,"abstract":"<p><p>The increasing use of electronic nicotine delivery systems (ENDS) is of concern due to multiple emerging adverse health effects. Most analyses of the harmful chemicals of ENDS have targeted metals or carbonyls generated by thermal decomposition of carrier liquids such as propylene glycol. However, new complex compounds not routinely identified and with unknown health consequences could be formed. ENDS aerosol samples were collected by the direct aerosol droplet deposition method. Untargeted analysis was performed using Orbitrap mass spectrometry with high mass accuracy. We identified more than 30 \"features\" in the aerosol characterized by pairs of the mass-to-charge ratio \"<i>m</i>/<i>z</i>\" of the compound and the retention time. We identified several compounds containing nicotine and propylene glycol (NIC-PG), whose abundance relative to nicotine increased along with vaping power used. On the basis of the prediction by the Environmental Protection Agency Toxicity Estimation Software Tool, these compounds exert developmental toxicity. In addition, a nitrogen-containing compound, likely tributylamine (a known lung irritant), was identified based on the molecular weight. This compound has not been previously identified in ENDS e-liquids and aerosols. ENDS produce not only small toxic compounds such as aldehydes, but also large complex toxic compounds such as NIC-PG. Predicted development toxicity for NIC-PG is concerning for fetal development in pregnant women who use ENDS, children exposed to secondhand or thirdhand ENDS aerosols, and teenage ENDS users whose brains are still developing. The strong positive association between NIC-PG levels and ENDS power output supports regulating high-powered ENDS.</p>","PeriodicalId":12007,"journal":{"name":"European Journal of Mass Spectrometry","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9035225/pdf/nihms-1795867.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39357323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Gas-phase generation of dinuclear Au(I)-Au(II) complexes by laser desorption ionization mass spectrometry. 激光解吸电离质谱法气相生成双核Au(I)-Au(II)配合物。
IF 1.3 4区 化学
European Journal of Mass Spectrometry Pub Date : 2021-04-01 Epub Date: 2021-06-29 DOI: 10.1177/14690667211028785
Małgorzata Kasperkowiak, Michalina Durnik, Wojciech Jankowski, Marcin Hoffmann, Błażej Gierczyk, Rafał Frański
{"title":"Gas-phase generation of dinuclear Au(I)-Au(II) complexes by laser desorption ionization mass spectrometry.","authors":"Małgorzata Kasperkowiak,&nbsp;Michalina Durnik,&nbsp;Wojciech Jankowski,&nbsp;Marcin Hoffmann,&nbsp;Błażej Gierczyk,&nbsp;Rafał Frański","doi":"10.1177/14690667211028785","DOIUrl":"https://doi.org/10.1177/14690667211028785","url":null,"abstract":"<p><p>Alkali metal chloroaurates(III) were analysed by laser desorption ionization mass spectrometry. Among a number of generated gas-phase ionic clusters, the unusual ions [MAu<sub>2</sub>Cl<sub>5</sub>]<sup>-</sup> (were M stands for Na, K, Rb, Cs) were detected. The spectra of metastable ions and quantum mechanics calculations show the presence of unprecedented Au(I)-Au(II) interactions in the clusters.</p>","PeriodicalId":12007,"journal":{"name":"European Journal of Mass Spectrometry","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/14690667211028785","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39120074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Establishment of validated stability indicating purity method based on the stress degradation behavior of gonadotropin-releasing hormone antagonist (ganirelix) in an injectable formulation using HPLC and LC-MS-QTOF. 基于促性腺激素释放激素拮抗剂(ganirelix)在注射制剂中的应激降解行为，采用HPLC和LC-MS-QTOF建立了经过验证的稳定性指示纯度方法。
IF 1.3 4区 化学
European Journal of Mass Spectrometry Pub Date : 2021-04-01 Epub Date: 2021-04-07 DOI: 10.1177/14690667211005335
Kumarswamy Ummiti, J V Shanmukha Kumar
{"title":"Establishment of validated stability indicating purity method based on the stress degradation behavior of gonadotropin-releasing hormone antagonist (ganirelix) in an injectable formulation using HPLC and LC-MS-QTOF.","authors":"Kumarswamy Ummiti,&nbsp;J V Shanmukha Kumar","doi":"10.1177/14690667211005335","DOIUrl":"https://doi.org/10.1177/14690667211005335","url":null,"abstract":"<p><p>Stress study of a drug substance or pharmaceutical drug product provides a vision into degradation pathways and degradation products of the active pharmaceutical ingredient and helps in interpretation of the chemical structure of the degradation impurities. In the current study, Ganirelix active ingredient presented in the Orgalutran® was stressed with acidic and alkali hydrolysis, photolysis, thermal and oxidation conditions as per the guidelines of International Conference on Harmonization (ICH) Q1A (R2). Ganirelix was found to be labile under thermal and alkali hydrolytic stress conditions, while it was stable to acid hydrolytic, oxidative and photolytic stress. All degradation products were separated with a resolution > 1.5 on a C18 column (2.6 µm, 25 cm×4.6 mm) using a hydrophilic ion pair such as sodium perchlorate, at a concentration <0.04 M. In total, four major degradant impurities were found during stress study. These impurities were fractionated and desalted by flash chromatography for identification of chemical structures. LC-MS-QTOF analysis revealed that two degradation products are diastereomers of Ganirelix, one degradation product is a deamination compound and other degradation product result from the insertion of a new amino acid residue in the Ganirelix peptide sequence. The developed method is sensitive enough to quantify the related substances of Ganirelix at the 0.04% level with that of Ganirelix test concentration.</p>","PeriodicalId":12007,"journal":{"name":"European Journal of Mass Spectrometry","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/14690667211005335","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25564730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A simulation study of excitation contour of a linear trap with spatial harmonics. 具有空间谐波的线性阱激励轮廓的仿真研究。
IF 1.3 4区 化学
European Journal of Mass Spectrometry Pub Date : 2021-04-01 Epub Date: 2021-05-26 DOI: 10.1177/14690667211020153
N V Konenkov
{"title":"A simulation study of excitation contour of a linear trap with spatial harmonics.","authors":"N V Konenkov","doi":"10.1177/14690667211020153","DOIUrl":"https://doi.org/10.1177/14690667211020153","url":null,"abstract":"<p><p>The process of nonlinear resonant excitation of ion oscillations in a linear trap is studied. There is still no detailed simulation of the resonance peak in the literature. We propose to use the excitation contour to describe the collective ion resonance. The excitation contour is a resonant mass peak obtained by the trajectory method with the Gaussian distribution of the initial coordinates and velocities. The following factors are considered: excitation time, low order hexapole and octopole harmonics with amplitudes A<sub>3</sub> and A<sub>4</sub>, the depth of the initial ion cloud position. These multipoles are used for selective ion ejection from linear ion trap. All these factors affect the ion yield and the shape of the contours. Obtained data can be useful for control of such processes as ion fragmentation, ion isolation, ion activation, and ion ejection. Simulated resonance peaks are important for the theoretical description of the ion collective nonlinear resonances.</p>","PeriodicalId":12007,"journal":{"name":"European Journal of Mass Spectrometry","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/14690667211020153","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38952117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Silicon surface assisted laser desorption ionization mass spectrometry for quantitative analysis. 硅表面辅助激光解吸电离质谱法定量分析。
IF 1.3 4区 化学
European Journal of Mass Spectrometry Pub Date : 2021-04-01 Epub Date: 2021-04-04 DOI: 10.1177/14690667211006017
Alexander A Grechnikov, Alexey S Borodkov, Yaroslav O Simanovsky, Sergey M Nikiforov
{"title":"Silicon surface assisted laser desorption ionization mass spectrometry for quantitative analysis.","authors":"Alexander A Grechnikov,&nbsp;Alexey S Borodkov,&nbsp;Yaroslav O Simanovsky,&nbsp;Sergey M Nikiforov","doi":"10.1177/14690667211006017","DOIUrl":"https://doi.org/10.1177/14690667211006017","url":null,"abstract":"<p><p>The approach to quantitative analysis by silicon Surface Assisted Laser Desorption Ionization Mass Spectrometry (Si-SALDI) is proposed. The approach is based on the new method for forming an active surface layer on a silicon substrate by exposing to laser radiation directly in the ion source of a mass spectrometer. The method can be used repeatedly on the same substrate, providing high reproducibility of its surface ionization properties and high ionization efficiency of organic compounds. Within the proposed approach, the methods of improvement of signal reproducibility are also considered, including continuous monitoring of the silicon surface ionization properties using a Knudsen effusion cell; scanning the surface of a silicon substrate with a laser beam; selecting the optimal value of laser fluence and using a reproducible sample introduction technique. It is demonstrated that this approach can be successfully applied to quantify clinically relevant concentrations of pharmaceutical drugs in extracts of blood.</p>","PeriodicalId":12007,"journal":{"name":"European Journal of Mass Spectrometry","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/14690667211006017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25561984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Characterization of anthocyanin from red sorghum (Sorghum bicolor) bran by liquid chromatography-electron spray ionization mass spectrometry analysis. 液相色谱-电子喷雾质谱分析表征红高粱(高粱双色)麸皮中花青素的含量。
IF 1.3 4区 化学
European Journal of Mass Spectrometry Pub Date : 2021-04-01 Epub Date: 2021-07-29 DOI: 10.1177/14690667211035720
P Suganyadevi, M Saravanakumar, S Mohandas
{"title":"Characterization of anthocyanin from red sorghum (<i>Sorghum bicolor</i>) bran by liquid chromatography-electron spray ionization mass spectrometry analysis.","authors":"P Suganyadevi,&nbsp;M Saravanakumar,&nbsp;S Mohandas","doi":"10.1177/14690667211035720","DOIUrl":"https://doi.org/10.1177/14690667211035720","url":null,"abstract":"<p><p>In the present study, anthocyanin pigments from red sorghum (<i>Sorghum bicolor</i>) bran were identified and characterized by Liquid Chromatography-Electron Spray Ionization Mass Spectrometry. The individual anthocyanins were identified by comparing their mass spectrometric data and retention times, published data. 3-deoxyanthocyanidins and methyl 3-deoxyanthocyanidins were identified in red sorghum bran. This paper presents complete LCMS profile and MS spectrometric data of red sorghum bran.</p>","PeriodicalId":12007,"journal":{"name":"European Journal of Mass Spectrometry","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/14690667211035720","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39257485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Theoretical fractional formulation of a three-dimensional radio frequency ion trap (Paul-trap) for optimum mass separation. 用于最佳质量分离的三维射频离子阱(保罗阱)的理论分数公式。
IF 1.3 4区 化学
European Journal of Mass Spectrometry Pub Date : 2021-04-01 Epub Date: 2021-07-04 DOI: 10.1177/14690667211026790
Sarkhosh Seddighi Chaharborj, Shahriar Seddighi Chaharborj, Zahra Seddighi Chaharborj, Pei See Phang
{"title":"Theoretical fractional formulation of a three-dimensional radio frequency ion trap (Paul-trap) for optimum mass separation.","authors":"Sarkhosh Seddighi Chaharborj,&nbsp;Shahriar Seddighi Chaharborj,&nbsp;Zahra Seddighi Chaharborj,&nbsp;Pei See Phang","doi":"10.1177/14690667211026790","DOIUrl":"https://doi.org/10.1177/14690667211026790","url":null,"abstract":"<p><p>We investigate the dynamics of an ion confined in a Paul-trap supplied by a fractional periodic impulsional potential. The Cantor-type cylindrical coordinate method is a powerful tool to convert differential equations on Cantor sets from cantorian-coordinate systems to Cantor-type cylindrical coordinate systems. By applying this method to the classical Laplace equation, a fractional Laplace equation in the Cantor-type cylindrical coordinate is obtained. The fractional Laplace equation is solved in the Cantor-type cylindrical coordinate, then the ions is modelled and studied for confined ions inside a Paul-trap characterized by a fractional potential. In addition, the effect of the fractional parameter on the stability regions, ion trajectories, phase space, maximum trapping voltage, spacing between two signals and fractional resolution is investigated and discussed.</p>","PeriodicalId":12007,"journal":{"name":"European Journal of Mass Spectrometry","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/14690667211026790","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39147654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Applications of Beta Negative Binomial Distribution Series on Holomorphic Functions 负二项分布级数在全纯函数上的应用
IF 1.3 4区 化学
European Journal of Mass Spectrometry Pub Date : 2021-03-23 DOI: 10.34198/EJMS.6221.271292
A. Wanas, Najah Ali Jiben Al-Ziadi
{"title":"Applications of Beta Negative Binomial Distribution Series on Holomorphic Functions","authors":"A. Wanas, Najah Ali Jiben Al-Ziadi","doi":"10.34198/EJMS.6221.271292","DOIUrl":"https://doi.org/10.34198/EJMS.6221.271292","url":null,"abstract":"The purpose of this article is to derive the necessary and sufficient conditions for the power series ℘ג, whose coefficients are probabilities of the beta negative binomial distribution to be in the family F , , , , , ג, of holomorphic functions which are defined in the open unit disk. We establish a number of important geometric properties, such as, coefficient estimates, extreme points, neighborhood property, integral representation, radii of starlikeness and convexity and Hadamard product properties for functions belongs to this family. Also we determinate some differential subordination properties of the power series ℘ג, .","PeriodicalId":12007,"journal":{"name":"European Journal of Mass Spectrometry","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42505033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Coupled Anti Q-Fuzzy Subgroups using t-Conorms 利用t-正则的耦合反q -模糊子群
IF 1.3 4区 化学
European Journal of Mass Spectrometry Pub Date : 2021-03-13 DOI: 10.34198/EJMS.6221.239251
C. Ampadu
{"title":"Coupled Anti Q-Fuzzy Subgroups using t-Conorms","authors":"C. Ampadu","doi":"10.34198/EJMS.6221.239251","DOIUrl":"https://doi.org/10.34198/EJMS.6221.239251","url":null,"abstract":"In this paper we study coupled anti Q-fuzzy subgroups of G with respect to t-conorm C. We also discuss the union, normal and direct product of them. Moreover, the homomorphic image and pre-image of them is investigated under group homomorphisms and anti homomorphisms. 1 Some Old and New Notions and Notations Remark 1.1. (a) In this paper we assume G is a group as defined in [1]. (b) We assume the notions of homomorphism and anti-homomorphism as defined in [1]. (c) We assume C : [0, 1]× [0, 1] 7→ [0, 1] is a t-conorm as defined in [1]. (d) By idempotent, we refer to t-conorm C as defined in [1]. Definition 1.2. Let G be an arbitrary group with multiplicative binary operation and identity e. By a fuzzy subset of G×G we mean a function from G×G into [0, 1]. The set of all fuzzy subsets of G×G will be called the [0, 1]-power set of G×G, and will be denoted by [0, 1]G×G. Received: February 1, 2021; Accepted: March 7, 2021 2010 Mathematics Subject Classification: 08A72, 20-XX, 47A30, 20N25, 20K27, 20K30.","PeriodicalId":12007,"journal":{"name":"European Journal of Mass Spectrometry","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46883360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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