美国分析化学(英文)最新文献_第2页

Microwave-Assisted Transition Metal Nanostructure Synthesis: Power-Law Signature Verification 微波辅助过渡金属纳米结构合成:幂律特征验证

美国分析化学(英文) Pub Date : 2023-01-01 DOI: 10.4236/ajac.2023.148018

V. Law, D. Dowling

引用次数: 1

Levels of Lead (Pb), Cadmium (Cd) and Cobalt (Co) in Cow Milk from Selected Areas of Zanzibar Island, Tanzania 坦桑尼亚桑给巴尔岛选定地区牛奶中铅(Pb)、镉(Cd)和钴(Co)的含量

美国分析化学(英文) Pub Date : 2023-01-01 DOI: 10.4236/ajac.2023.147016

H. R. Ali, Mwanahija Mohamed Ame, M. Sheikh, Said Suleiman Bakari

引用次数: 2

Revisiting “Non-Thermal” Batch Microwave Oven Inactivation of Microorganisms 回顾“非热”批量微波炉灭活微生物

美国分析化学(英文) Pub Date : 2023-01-01 DOI: 10.4236/ajac.2023.141003

V. Law, D. Dowling

引用次数: 2

A Comparative Analysis of Caffeine Extraction Efficiency from Different Tea Varieties and Its Effect on Human Physiology: A Spectrophotometric Investigation 不同茶叶品种咖啡因提取效率的比较分析及其对人体生理的影响:分光光度法研究

美国分析化学(英文) Pub Date : 2023-01-01 DOI: 10.4236/ajac.2023.143008

U. Gazal

引用次数: 0

Microwave-Assisted Au and Ag Nanoparticle Synthesis: An Energy Phase-Space Projection Analysis 微波辅助金、银纳米粒子合成:能量相空间投影分析

美国分析化学(英文) Pub Date : 2023-01-01 DOI: 10.4236/ajac.2023.144009

V. Law, D. Dowling

引用次数: 2

Screening Method for 23 Alkaloids in Human Serum Using LC/MS/MS with a Pentafluorophenyl Column in Dynamic Multiple Reaction Monitoring Mode 动态多反应监测模式下LC/MS/MS -五氟苯基柱筛选人血清中23种生物碱的方法

美国分析化学(英文) Pub Date : 2022-01-01 DOI: 10.4236/ajac.2022.1311027

C. Sasaki, T. Shinozuka, Fumiko Satoh

{"title":"Screening Method for 23 Alkaloids in Human Serum Using LC/MS/MS with a Pentafluorophenyl Column in Dynamic Multiple Reaction Monitoring Mode","authors":"C. Sasaki, T. Shinozuka, Fumiko Satoh","doi":"10.4236/ajac.2022.1311027","DOIUrl":"https://doi.org/10.4236/ajac.2022.1311027","url":null,"abstract":"Alkaloids are nitrogen-containing organic compounds, generally basic, and found in plants, fungi, and bacteria. Some alkaloids are used in medicine, but some compounds are highly toxic. Accidental ingestion, homicide, and suicide have occurred due to plants containing alkaloids. The identification of toxic components in biological samples is important for the diagnosis and/or treatment of poisoning cases in forensic and emergency medicine. Alkaloids have a wide variety of structures, such as isoquinoline alkaloid, indole alkaloid, tropane alkaloid, and diterpene alkaloid; therefore, there are few reports of simultaneous analysis methods. We have established a method for the simultaneous analysis of 23 alkaloids in human serum with a liquid chromato-graph-tandem mass spectrometer (LC/MS/MS). A liquid-liquid extraction which was modified from the first step of the QuEChERS AOAC method was used for serum pretreatment. The separation of the compounds was performed using a pentafluorophenyl (PFP) column, CAPCELL CORE PFP (2.1 mm I.D. × 100 mm, 2.7 μm) in gradient mode. Mobile phase A consisted of 10 mM ammonium formate and 0.1% formic acid in ultrapure water, and mobile phase B was 10 mM ammonium formate and 0.1% formic","PeriodicalId":63216,"journal":{"name":"美国分析化学(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70500302","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: 1

Rapid Method for Greywater Treatment and Their Potential Reuse in Agriculture 灰水的快速处理方法及其在农业中的再利用潜力

美国分析化学(英文) Pub Date : 2022-01-01 DOI: 10.4236/ajac.2022.132003

Eman Mahmoud El Qrenawi, Ibrahim Y. El-Nahhal, Mohamad R. Al-Agha, Y. El-Nahhal

引用次数: 0

Screening for Plant Toxins in Honey and Herbal Beverage by Ultrahigh-Performance Liquid Chromatography-Ion Mobility-Quadrupole Time of Flight Mass Spectrometry 应用超高效液相色谱-离子迁移-四极杆飞行时间质谱法筛选蜂蜜和草药饮料中的植物毒素

美国分析化学(英文) Pub Date : 2022-01-01 DOI: 10.4236/ajac.2022.133009

Q. Guo, Yi Yang, Jiang Li, B. Shao, Jing Zhang

引用次数: 6

Ion Selective Electrode Determination of Ammonia Nitrogen in Passaic River Waste Water in New Jersey Essex County Area 离子选择电极法测定新泽西州埃塞克斯县帕塞伊克河废水中氨氮

美国分析化学(英文) Pub Date : 2022-01-01 DOI: 10.4236/ajac.2022.133008

Y. Yildiz, R. Karadag, M. Cheema, Mohammad Sayedahmed

引用次数: 2

A Stability Indicating Reverse Phase-HPLC Method Development and Validation for the Estimation of Bimatoprost 0.3% & Timolol 0.5% Pharmaceutical Ophthalmic Dosage Form 稳定性指示反相高效液相色谱法测定0.3%比马前列素0.5%替莫洛尔眼用制剂的含量及验证

美国分析化学(英文) Pub Date : 2022-01-01 DOI: 10.4236/ajac.2022.1312034

Md. S. Amin, M. T. Islam

{"title":"A Stability Indicating Reverse Phase-HPLC Method Development and Validation for the Estimation of Bimatoprost 0.3% & Timolol 0.5% Pharmaceutical Ophthalmic Dosage Form","authors":"Md. S. Amin, M. T. Islam","doi":"10.4236/ajac.2022.1312034","DOIUrl":"https://doi.org/10.4236/ajac.2022.1312034","url":null,"abstract":"The research was carried out to establish a new reverse phase-HPLC stability indicating method for quantifying Bimatoprost & Timolol in ophthalmic solution. The experiment of Bimatoprost & Timolol in ophthalmic solution method development was determined on Waters HPLC instrument using a UV Detector. The separation was done by using L11, Zorbex SB phenyl (4.6 mm × 250 mm internal diameter) 5 µm analytical column, containing mobile phase of Phosphate buffer (0.02 M), methanol, and acetonitrile [50:30:20 % v/v]. The method was run at 1 ml∙min −1 at 210 nm for Bimatoprost and 295 nm for Timolol for detection. The drug was eluted at 10.81 min for Bimatoprost and 3.77 min for Timolol. After developing the method, it was assured for the intended use by validation, which was done according to ICH Q2B guidelines. The analytical parameters checked were Specificity/Selectivity, linearity, Range, accuracy, ruggedness, and robustness. It was observed that the response of the detector was linear in the range of 6 - 18 µg/ml with a correlation coefficient of 0.999. The results of all the parameters were found to be within the acceptance criteria. The stability-indicating assay method was established by using the samples generated by the forced degradation process","PeriodicalId":63216,"journal":{"name":"美国分析化学(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70500545","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