International Journal of Analytical Chemistry最新文献

{"title":"Retracted: Residential Environment Pollution Monitoring System Based on Cloud Computing and Internet of Things.","authors":"International Journal Of Analytical Chemistry","doi":"10.1155/2023/9858523","DOIUrl":"https://doi.org/10.1155/2023/9858523","url":null,"abstract":"<p><p>[This retracts the article DOI: 10.1155/2022/1013300.].</p>","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"2023 ","pages":"9858523"},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10446985/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10427437","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}

{"title":"Simultaneous Determination and Stability Analysis of Ten New Psychoactive Substances including Synthetic Cathinones, Phenethylamines, and Ketamine Substitutes in Urine Using Liquid Chromatography-Tandem Mass Spectrometry.","authors":"Feng-Shuo Yang,&nbsp;Hei-Hwa Lee,&nbsp;Li-Ping Tseng,&nbsp;Yung-Hung Lee,&nbsp;Yung-Sheng Lan,&nbsp;Yi-Cheng Lee,&nbsp;Yi-Cheng Chou,&nbsp;Yi-Ching Lin","doi":"10.1155/2023/9895595","DOIUrl":"https://doi.org/10.1155/2023/9895595","url":null,"abstract":"<p><p>Knowing the stability of drugs is important to ensure accurate and reliable results of drug concentrations. This study evaluated the stability of ten new psychoactive substances (NPSs) in urine and methanol/water at different storage temperatures. Quantitative analyses were performed using liquid chromatography-tandem mass spectrometry. Three replicates of each storage condition were analyzed at day 0 and after 7, 14-, 30-, 60-, and 90 days with storage at +25°C, +4°C, and -20°C. For each analyte, the percent difference at each time interval from day 0 was calculated for each storage condition. Para-methoxyamphetamine (PMA), para-methoxymethamphetamine (PMMA), deschloroketamine (DCK), and 2-fluorodeschloroketamine (2-FDCK) were stable in urine, even when stored for 90-day periods at various temperatures. For synthetic cathinones, the concentrations declined over time at room temperature (+25°C) in urine but were relatively stable in methanol solvent with 0.1% formic acid. The significant degradation was found at +25°C, and the most excellent stability was shown by samples stored at -20°C. Phenethylamines (PMA and PMMA) and ketamine substitutes (DCK and 2-FDCK) were relatively more stable than synthetic cathinones (mephedrone, butylone, pentylone, ephylone, 4-MEAPP, and eutylone).</p>","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"2023 ","pages":"9895595"},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10365918/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9878118","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}

{"title":"Retracted: Effect of Free Formaldehyde on Chemical Structure and Thermal Properties of Nano-Titanium Dioxide Resin.","authors":"International Journal Of Analytical Chemistry","doi":"10.1155/2023/9813219","DOIUrl":"https://doi.org/10.1155/2023/9813219","url":null,"abstract":"<p><p>[This retracts the article DOI: 10.1155/2022/7306597.].</p>","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"2023 ","pages":"9813219"},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10447101/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10427430","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}

{"title":"Retracted: Stability Analysis and Construction Parameter Optimization of Tunnels in the Fractured Zone of Faults.","authors":"International Journal Of Analytical Chemistry","doi":"10.1155/2023/9841604","DOIUrl":"https://doi.org/10.1155/2023/9841604","url":null,"abstract":"<p><p>[This retracts the article DOI: 10.1155/2022/2211499.].</p>","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"2023 ","pages":"9841604"},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10447024/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10427443","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}

{"title":"Retracted: Load Test Analysis of a Long-Span Prestressed Nano-Concrete Highway Bridge.","authors":"International Journal Of Analytical Chemistry","doi":"10.1155/2023/9853014","DOIUrl":"https://doi.org/10.1155/2023/9853014","url":null,"abstract":"<p><p>[This retracts the article DOI: 10.1155/2022/5169548.].</p>","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"2023 ","pages":"9853014"},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10447148/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10448232","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}

{"title":"Retracted: A Systematic Study on the Extraction and Image Reproduction of Ceramic Sculpture Artworks.","authors":"International Journal Of Analytical Chemistry","doi":"10.1155/2023/9836308","DOIUrl":"https://doi.org/10.1155/2023/9836308","url":null,"abstract":"[This retracts the article DOI: 10.1155/2022/6752589.].","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"2023 ","pages":"9836308"},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10447151/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10448235","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}

{"title":"Fast and Sensitive Detection of SARS-CoV-2 Nucleic Acid Using a Rapid Detection System Free of RNA Extraction.","authors":"Liang Ma,&nbsp;Yanyan Fan,&nbsp;Xiaomu Kong,&nbsp;Yongwei Jiang,&nbsp;Hong Huang,&nbsp;Meimei Zhao,&nbsp;Yi Liu,&nbsp;Peng Gao,&nbsp;Yong Cui,&nbsp;Yongtong Cao","doi":"10.1155/2023/8053524","DOIUrl":"https://doi.org/10.1155/2023/8053524","url":null,"abstract":"<p><strong>Objectives: </strong>To establish and evaluate the analytical and clinical performance of the Flash20 SARS-CoV-2 nucleic acid rapid detection system free of RNA extraction.</p><p><strong>Methods: </strong>The limit of detection (LoD) was determined using a negative nasopharyngeal swab matrix spiked with different concentrations of SARS-CoV-2 virus; a total of 734,337 reference sequences of viral genomes from GenBank were used for the in-silico analysis to assess the inclusivity of the assay. The specificity of the system was evaluated by testing 27 medically relevant organisms. A total of 115 clinical specimens were collected and tested on the Flash20 SARS-CoV-2 detection system and with an FDA-approved comparator test to assess the clinical performance of the system.</p><p><strong>Results: </strong>The LoD of the Flash20 SARS-CoV-2 detection system is 250 copies/mL with a positive rate ≥90% (<i>n</i> = 20); alignments results showed that over 99% identity of the primer and probe of the Flash20 SARS-CoV-2 nucleic acid rapid detection system to the available SARS-CoV-2 sequences; the omicron samples tested 100% positive. None of the 27 organisms showed cross-reactivity with the Flash20 SARS-CoV-2 nucleic acid rapid detection system. Among all the 215 clinical samples, the Flash20 SARS-CoV-2 nucleic acid rapid detection system exhibits a high sensitivity of 99.24% (131/132) and 100% (83/83) specificity.</p><p><strong>Conclusion: </strong>The nucleic acid rapid detection system provides sensitive and accurate detection of SARS-CoV-2 free of RNA extraction. The high sensitivity and short time to results of approximately 35 minutes may impact earlier infection control and disease management.</p>","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"2023 ","pages":"8053524"},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9883100/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10590982","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}

{"title":"Comparison between the Chemical Composition of Essential Oil from Commercial Products and Biocultivated <i>Lavandula angustifolia</i> Mill.","authors":"Velislava Todorova,&nbsp;Kalin Ivanov,&nbsp;Yoana Georgieva,&nbsp;Diana Karcheva-Bahchevanska,&nbsp;Stanislava Ivanova","doi":"10.1155/2023/1997157","DOIUrl":"https://doi.org/10.1155/2023/1997157","url":null,"abstract":"<p><p>The main aim of this study was to assess the differences in the chemical composition of essential oil from biocultivated <i>Lavandula angustifolia</i> in the Thracian Lowland floristic region, Bulgaria, and commercially available products from Bulgarian markets. Following the analytical results conducted with gas chromatography-mass spectrometry, we have established some differences in the chemical composition of the tested samples. The essential oil of biocultivated lavender contained 35 compounds, which represent 94.13% of the total oil. Samples from commercial products contained 28-42 compounds that represent 93.03-98.69% of the total oil. All the examined samples were rich in monoterpene hydrocarbons (1.68-12.77%), oxygenated monoterpenes (70.42-87.96%), sesquiterpene hydrocarbons (4.03-13.78%), and oxygenated sesquiterpenes (0.14-0.76%). The dominant components in all examined samples were linalool (20.0-45.0%) and linalyl acetate (20.79-39.91%). All the examined commercial samples contained linalool and linalyl acetate as was described in the European Pharmacopoeia, but in one of the samples, the quality of linalyl acetate is lower than that recommended in the European Pharmacopoeia.</p>","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"2023 ","pages":"1997157"},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9859693/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10635599","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}

{"title":"Comparative Pharmacokinetic Study of 5 Active Ingredients after Oral Administration of Zuogui Pill in Osteoporotic Rats with Different Syndrome Types.","authors":"Jiawei Qiu,&nbsp;Yaoyao Zhu,&nbsp;Jing Xing,&nbsp;Ling Wang,&nbsp;Jianhua Zhang,&nbsp;Hua Yin","doi":"10.1155/2023/1473878","DOIUrl":"https://doi.org/10.1155/2023/1473878","url":null,"abstract":"<p><p>Zuogui Pill is a kidney-yin-tonifying formula in traditional Chinese medicine that is widely used to manage osteoporosis with kidney-yin-deficiency in China. Herein, an efficient and accurate high-performance liquid chromatography-tandem mass spectrometry method was developed to determine the concentrations of 5 bioactive compounds in rat plasma following oral administration of Zuogui Pill. Because drug absorption and distribution differ under physiological and pathological conditions, the established method was used to quantify blood components and dynamic change in osteoporotic rats with different syndrome types. Moreover, integrated pharmacokinetic study was conducted to describe the overall pharmacokinetic characteristics of traditional Chinese medicine. The results showed that the absorption, distribution, and metabolism of Zuogui Pill varied widely under different states. The bioavailability of most active components showed significant advantages in osteoporotic rats with kidney-yin-deficiency, which corresponds to the opinion that Zuogui Pill has the effect of nourishing kidney-yin. It is hoped that this finding could interpret the pharmacodynamic substances and mechanism of Zuogui Pill in the treatment of osteoporosis with kidney-yin-deficiency.</p>","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"2023 ","pages":"1473878"},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10045483/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9217464","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}

{"title":"Comparative Study on Chemical Constituents of Ginseng Flowers with Four Consecutive Cultivation Age.","authors":"Lian-Yun Du,&nbsp;Hui-E Zhang,&nbsp;Ye Zhang,&nbsp;Yan-Yan Han,&nbsp;Ping Ye,&nbsp;Xiang-Ru Meng,&nbsp;Yan-Long Shen,&nbsp;Chang-Bao Chen,&nbsp;Mei-Ling Fan,&nbsp;En-Peng Wang","doi":"10.1155/2023/1771563","DOIUrl":"https://doi.org/10.1155/2023/1771563","url":null,"abstract":"<p><p>The harvest period of cultivated ginseng is generally 4-6 years. Ginseng flowers (GFs), the nonmedicinal parts, are usually removed every autumn, in which components are generally believed to stay unchanged with the increasing cultivation age. Recently, few documents were reported on the variation of volatile organic compounds (VOCs) and other components about ginseng flowers. This study had an insight into the variation of the chemical constituents with the cultivation ages through the comparison of the volatile organic compounds, gross ginsenosides, crude polysaccharide, and gross proteins of ginseng flowers from 3-, 4-, 5-, and 6-yr-old (GF3, GF4, GF5, and GF6) which were conducted by headspace solid-phase microextraction-gas chromatography-triple quadrupole mass spectrometry (HS-SPME-GC-QQQ/MS) and spectroscopic analysis combined with multivariate statistical analysis, including one-way ANOVA analysis and <i>T</i> test. The results indicated that the crude polysaccharide contents raised significantly depending on cultivation age except 6-yr-old, whereas the gross ginsenosides and the gross protein content were indistinctive. According to the peak intensity of determined VOCs, the contents of most differential compounds arranged in an order from high to low are GF3, GF4, GF5, and GF6, such as the compounds <b>2</b>-<b>15</b>, <b>17</b>-<b>19</b>, <b>22</b>, and <b>25</b>-<b>26</b>, therefore, they can be inferred that they are important markers to identify the age of GFs. 461 common differential compounds were gained and 26 common volatile organic compounds were identified with RSI >800 and RI and RIx no more than 30, including alcohols (such as <b>11</b>, <b>12</b>, and <b>15</b>), sesquiterpenes (such as <b>2</b>, <b>3</b>, and <b>4</b>), esters (such as <b>1</b> and <b>26</b>), naphthalene and naphthol (such as <b>7</b> and <b>20</b>), which had potential effects on curing Alzheimer's disease, inflammatory diseases, and prostate cancer based on network pharmacology analysis. This paper firstly revealed the variation rules of constitutions of GFs, which may provide a reference for the harvest and making rational application.</p>","PeriodicalId":13888,"journal":{"name":"International Journal of Analytical Chemistry","volume":"2023 ","pages":"1771563"},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10089779/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9298825","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}