发布求助
文献互助 智能选刊 最新文献

Analytical Communications最新文献

筛选
英文 中文
Study on fluorescence of the Tb(III)–enoxacin system and the determination of enoxacin Tb(III) -依诺沙星体系的荧光研究及依诺沙星的测定
Analytical Communications Pub Date : 1999-01-01 DOI: 10.1039/A902452B
Y. Fangtian, J. Linpei, Z. Huichun
{"title":"Study on fluorescence of the Tb(III)–enoxacin system and the determination of enoxacin","authors":"Y. Fangtian, J. Linpei, Z. Huichun","doi":"10.1039/A902452B","DOIUrl":"https://doi.org/10.1039/A902452B","url":null,"abstract":"A very simple, rapid and highly sensitive fluorimetric method for the determination of enoxacin (ENX) is described. The method is based on the formation of Tb(III)–ENX complex in the aqueous solution, which fluoresces intensely with an emission maximum at 545 nm (Tb3+∶5D4 → 7F5) when excited at 335 nm. Optimum conditions for the determination were investigated. A linear relationship was obtained between the fluorescence intensity and ENX concentration in the range 8.0 × 10–9–6.0 × 10–6 M. The limit of detection was 5.9 × 10–10 M. Analytical recoveries from untreated urine samples spiked with ENX were in the range 95–102.5%.","PeriodicalId":7814,"journal":{"name":"Analytical Communications","volume":"1 1","pages":"231-233"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90833644","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: 16
A photoelectric method for analyzing cell-free apoptosis induced by dATP dATP诱导细胞游离凋亡的光电分析方法
Analytical Communications Pub Date : 1999-01-01 DOI: 10.1039/A900317G
Y. Ci, Chun-yang Zhang, Jun Feng, Ai-dong Lang, Chun‐hui Huang, Zhengfan Jiang
{"title":"A photoelectric method for analyzing cell-free apoptosis induced by dATP","authors":"Y. Ci, Chun-yang Zhang, Jun Feng, Ai-dong Lang, Chun‐hui Huang, Zhengfan Jiang","doi":"10.1039/A900317G","DOIUrl":"https://doi.org/10.1039/A900317G","url":null,"abstract":"A new photoelectric method for analyzing cell-free apoptosis had been developed with ITO (a transparent electrode of indium–tin oxide coated borosilicate) technology. The C5710 mice liver nuclei responded with a negative photoelectric current pulse to white light (200–800nm). During the apoptosis of liver nuclei induced by dATP (deoxyadenosine-5-triphosphate), the photoelectric current showed a dynamic decrease, which was in accordance with the results of fluorescence microscopy and agarose gel electrophoresis. This photoelectric analytical method might provide a rapid and sensitive way to evaluate apoptosis quickly and in a continuous fashion.","PeriodicalId":7814,"journal":{"name":"Analytical Communications","volume":"48 1","pages":"143-145"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80384314","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
Non-destructive real-time reaction monitoring in solid phase synthesis by near-infrared reflectance spectroscopy—esterification of a resin-bound alcohol 用近红外反射光谱法实时监测固相合成中的非破坏性反应-树脂结合醇的酯化反应
Analytical Communications Pub Date : 1999-01-01 DOI: 10.1039/A900747D
Jonathan Hammond, A. Moffat, R. D. Jee, B. Kellam
{"title":"Non-destructive real-time reaction monitoring in solid phase synthesis by near-infrared reflectance spectroscopy—esterification of a resin-bound alcohol","authors":"Jonathan Hammond, A. Moffat, R. D. Jee, B. Kellam","doi":"10.1039/A900747D","DOIUrl":"https://doi.org/10.1039/A900747D","url":null,"abstract":"Near-infrared (NIR) reflectance spectroscopy has been used to monitor the chemical inter-conversion of resin-bound functional groups. Measurements required no sample preparation and were made directly through the bottom of the glass reaction vessel. The time–concentration profile of the esterification of a resin-bound alcohol by acetic anhydride in a toluene medium is demonstrated.","PeriodicalId":7814,"journal":{"name":"Analytical Communications","volume":"180 1","pages":"127-129"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75137808","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: 10
A polypyrrole-coated, piezoelectric sensor for CrVI. Preliminary results 一种用于CrVI的聚吡咯涂层压电传感器。初步结果
Analytical Communications Pub Date : 1999-01-01 DOI: 10.1039/A809667H
E. Desimoni, I. Bassani
{"title":"A polypyrrole-coated, piezoelectric sensor for CrVI. Preliminary results","authors":"E. Desimoni, I. Bassani","doi":"10.1039/A809667H","DOIUrl":"https://doi.org/10.1039/A809667H","url":null,"abstract":"The piezoresonators of a quartz-crystal microbalance were surface-coated with electropolymerised polypyrrole films. After potentiostatic reduction at –0.9 V, the reduced PPy-coated resonators were allowed to react with solutions containing different concentrations of CrVI. Mass changes of the polymer film, originated by ionic transfer during the oxidation reaction of PPy by hexavalent chromium, produced frequency shifts proportional to the concentration of CrVI. Also, frequency shifts were obtained by reaction of some antioxidants at oxidised PPy-coated resonators. The observed responses depend on several experimental parameters.","PeriodicalId":7814,"journal":{"name":"Analytical Communications","volume":"69 1","pages":"45-46"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73645797","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: 8
Recent developments in the analysis of light isotopes by continuous flow isotope ratio mass spectrometry 连续流同位素比质谱法分析轻同位素的最新进展
Analytical Communications Pub Date : 1999-01-01 DOI: 10.1039/A904908H
A. J. Midwood
{"title":"Recent developments in the analysis of light isotopes by continuous flow isotope ratio mass spectrometry","authors":"A. J. Midwood","doi":"10.1039/A904908H","DOIUrl":"https://doi.org/10.1039/A904908H","url":null,"abstract":"","PeriodicalId":7814,"journal":{"name":"Analytical Communications","volume":"34 1","pages":"291-294"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73256504","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: 8
The improved potentiometric pH response of electrodes modified with processible polyaniline. Application to glucose biosensor 可加工聚苯胺修饰电极改善电位pH响应。葡萄糖生物传感器的应用
Analytical Communications Pub Date : 1999-01-01 DOI: 10.1039/A900597H
A. Karyakin, L. V. Lukachova, E. E. Karyakina, A. Orlov, G. P. Karpachova
{"title":"The improved potentiometric pH response of electrodes modified with processible polyaniline. Application to glucose biosensor","authors":"A. Karyakin, L. V. Lukachova, E. E. Karyakina, A. Orlov, G. P. Karpachova","doi":"10.1039/A900597H","DOIUrl":"https://doi.org/10.1039/A900597H","url":null,"abstract":"Processible polyaniline (PCPAn) modified electrodes are characterized by an advanced potentiometric pH response in comparison to those based on regular polyaniline. Glassy carbon electrodes modified with PCPAn by dip-coating exhibited a fully reversible potentiometric response of approximately 90 mV pH–1 over the range pH 3–9. Such significantly higher potentiometric responses of PCPAn modified electrodes compared to existing devices is explained on the basis of the thermodynamics of polyaniline redox reactions. The potentiometric biosensor for glucose based on processible polyaniline has been developed using a non-aqueous enzymology approach for enzyme immobilization. In the model solution, which mimics blood serum, the biosensor was useful for glucose detection over the concentration range 0.1–30 mM and the maximum response value reached was ≈80 mV. The advanced potentiometric response of PCPAn modified electrodes provides their application for sensor and biosensor development.","PeriodicalId":7814,"journal":{"name":"Analytical Communications","volume":"66 1","pages":"153-156"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89326532","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: 39
Novel sorbent extraction technique using a chelating agent impregnated porous PTFE filter tube : Preconcentration of In(III) with a bis(2-ethylhexyl) hydrogen phosphate (HDEHP) loaded porous PTFE filter tube 用络合剂浸渍多孔聚四氟乙烯滤管的新型吸附剂萃取技术:负载双(2-乙基己基)磷酸氢(HDEHP)多孔聚四氟乙烯滤管预富集In(III)
Analytical Communications Pub Date : 1999-01-01 DOI: 10.1039/A902146I
M. Murakami, T. Takada
{"title":"Novel sorbent extraction technique using a chelating agent impregnated porous PTFE filter tube : Preconcentration of In(III) with a bis(2-ethylhexyl) hydrogen phosphate (HDEHP) loaded porous PTFE filter tube","authors":"M. Murakami, T. Takada","doi":"10.1039/A902146I","DOIUrl":"https://doi.org/10.1039/A902146I","url":null,"abstract":"The sorption and elution of In(III) on a porous PTFE filter tube impregnated with bis(2-ethylhexyl) hydrogen phosphate (HDEHP) was studied. A 1 µg portion of In(III) in 1000 ml of sample solution was quantitatively complexed with HDEHP adsorbed onto a porous PTFE filter tube by passing the solution through the micropores of the filter tube. Preconcentrated In(III) was then quantitatively recovered provided that the elution, which consisted of cyclical filtering of 0.1 ml of 4 mol l–1 hydrochloric acid through the filter tube for 1 min, was repeated 3 times. The total volume of the eluent was only 0.3 ml in this case; therefore, over 3300-fold of enrichment was attained within 90 min of total preconcentration time. This method was applicable to the preconcentration of In(III) in highly saline samples. A 2.5 µg portion of In(III) could be quantitatively extracted from 500 ml of synthetic seawater and be recovered into 0.5 ml of 4 mol l–1 hydrochloric acid, with subsequent determination by flame AAS. The average recovery and the RSD of the results were 100% and of 1.4%, respectively (n = 5).","PeriodicalId":7814,"journal":{"name":"Analytical Communications","volume":"44 1","pages":"185-188"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90663705","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: 4
Renewable-surface graphite–ceramic enzyme sensors for the determination of hypoxanthine in fish meat 可再生表面石墨陶瓷酶传感器测定鱼肉中的次黄嘌呤
Analytical Communications Pub Date : 1999-01-01 DOI: 10.1039/A900896I
J. Niu, J. Lee
{"title":"Renewable-surface graphite–ceramic enzyme sensors for the determination of hypoxanthine in fish meat","authors":"J. Niu, J. Lee","doi":"10.1039/A900896I","DOIUrl":"https://doi.org/10.1039/A900896I","url":null,"abstract":"Sol–gel processes were used to fabricate amperometric biosensors that are active for hypoxanthine (Hx) determination. Xanthine oxidase was immobilized in the bulk of the silica–graphite matrix (SGM) to produce electrodes where new surfaces can be generated on demand by mechanical polishing. The immobilized enzyme electrodes can be used in unmediated hydrogen peroxide oxidation mode, or in unmediated and mediated oxygen reduction mode, to result in three different types of Hx biosensors with detection limits of 1.3 × 10–6, 5.6 × 10–6 and 3.8 × 10–7M, respectively. Benzyl viologen was used as the charge transfer mediator to enhance the response in the hydrogen peroxide production mode. The sensors show good linear response over a wide range of concentrations of about 1 × 10–6–1 × 10–3M. The use of bulk immobilization and the possibility of renewable surfaces have enabled the easy operation of these sensors with high stability. The experimental results from a carp sample stored under different conditions demonstrate the practicality of these sensors as simple, rapid and cost effective measurement of fish meat freshness.","PeriodicalId":7814,"journal":{"name":"Analytical Communications","volume":"11 1","pages":"81-83"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80791740","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: 32
A molecularly imprinted polymer for the pesticide bentazone 一种用于农药苯达酮的分子印迹聚合物
Analytical Communications Pub Date : 1999-01-01 DOI: 10.1039/A902968K
C. Baggiani, G. Giraudi, C. Giovannoli, A. Vanni, F. Trotta
{"title":"A molecularly imprinted polymer for the pesticide bentazone","authors":"C. Baggiani, G. Giraudi, C. Giovannoli, A. Vanni, F. Trotta","doi":"10.1039/A902968K","DOIUrl":"https://doi.org/10.1039/A902968K","url":null,"abstract":"Polymers able to bind the pesticide bentazone were prepared by utilising the technique of the non-covalent molecular imprinting polymerisation and using different molar ratios of methacrylic acid and 4-vinylpyridine as interacting monomers. Polymers obtained were packed in HPLC columns and the imprinting effect was studied using chloroform and acetonitrile as mobile phase. The polymer obtained from equimolar amounts of methacrylic acid and 4-vinylpyridine was found to recognise bentazone better than other polymers, both in chloroform and acetonitrile. The bentazone capacity for this stationary phase was studied considering aqueous buffers with different pH values and ionic strengths. A preliminary procedure of solid phase extraction was tested on aqueous samples containing a fixed amount of bentazone. Good recoveries (91–96%) and concentration factors of 3.2–15.2 were found.","PeriodicalId":7814,"journal":{"name":"Analytical Communications","volume":"29 1","pages":"263-266"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85232743","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: 58
Selective recognition and separation of β-lactam antibiotics using molecularly imprinted polymers 分子印迹聚合物选择性识别和分离β-内酰胺类抗生素
Analytical Communications Pub Date : 1999-01-01 DOI: 10.1039/A905151A
K. Skudar, O. Brüggemann, A. Wittelsberger, O. Ramström
{"title":"Selective recognition and separation of β-lactam antibiotics using molecularly imprinted polymers","authors":"K. Skudar, O. Brüggemann, A. Wittelsberger, O. Ramström","doi":"10.1039/A905151A","DOIUrl":"https://doi.org/10.1039/A905151A","url":null,"abstract":"Molecularly imprinted polymers (MIPs) to penicillin V or oxacillin were prepared, and their recognition properties were investigated, both in organic and aqueous phases. The resulting MIPs proved to be efficient in distinguishing between different penicillins (penicillin V, penicillin G and oxacillin), but could also be prepared to recognise the penicillins as a group. The results indicate that MIPs can be used to prepare either selective or general recognition matrices for penicillins, which can be of potential use in separation and detection applications.","PeriodicalId":7814,"journal":{"name":"Analytical Communications","volume":"23 1","pages":"327-331"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81504379","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: 38
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信