Analytical Sciences最新文献_第5页

Progress and prospect in analytical science and technology 分析科学技术的进展与展望

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-05-09 DOI: 10.1007/s44211-025-00770-4

Noritada Kaji

引用次数: 0

Microfluidic devices integrated with track-etched porous membranes for cell-based bioanalysis. 微流控装置集成的轨迹蚀刻多孔膜的细胞为基础的生物分析。

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-05-09 DOI: 10.1007/s44211-025-00789-7

Naoki Sasaki

引用次数: 0

Highly sensitive electrochemical sensing of ascorbic acid (vitamin C) using Pd-doped MnO₂ supported on carbon quantum dots (Pd-MnO₂@CQD) in water and fruit juices. 在水和果汁中使用碳量子点（Pd-MnO2@CQD）负载pd掺杂MnO2对抗坏血酸（维生素C）的高灵敏度电化学传感。

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-05-08 DOI: 10.1007/s44211-025-00787-9

Deepak Kumar, Daraksha Bano, Subhash Chandra, Bharat Kumar, Vivek Kumar, Pradeep Kumar Yadav, Syed Hadi Hasan

引用次数: 0

Estimation of the average molecular weight of microbial polyesters from FTIR spectra using artificial intelligence. 利用人工智能从FTIR光谱估计微生物聚酯的平均分子量。

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-05-08 DOI: 10.1007/s44211-025-00780-2

Peter Polyak, Paweł Chaber, Marta Musioł, Grażyna Adamus, Marek Kowalczuk, Judit E Puskas, Miroslawa El Fray

{"title":"Estimation of the average molecular weight of microbial polyesters from FTIR spectra using artificial intelligence.","authors":"Peter Polyak, Paweł Chaber, Marta Musioł, Grażyna Adamus, Marek Kowalczuk, Judit E Puskas, Miroslawa El Fray","doi":"10.1007/s44211-025-00780-2","DOIUrl":"https://doi.org/10.1007/s44211-025-00780-2","url":null,"abstract":"In this paper, we present a method for calculating the average molecular weight of microbial polyesters using Fourier transform infrared spectroscopy (FTIR) data as input. FTIR spectra provide the necessary quantitative information, as the impact of chain ends on the spectra is influenced by the average molecular weight of the polymer. Since FTIR data can be collected rapidly and is available in abundance, it serves as an ideal input for machine learning algorithms, such as artificial neural networks. The robustness and reliability of the model are improved by designing the neural network to use absorbance ratios instead of absolute absorbances as input. We also propose a new feature selection method that facilitates the identification of absorbance ratio regions best suited to serve as input for the neural network. Our approach ensures that variations in sample preparation do not compromise the accuracy of the model. The proposed computational method is demonstrated using a microbial polyester [poly(3-hydroxybutyrate), PHB], which is a biopolymer natively synthesized by multiple bacterial strains. Although the computational method has been tested with PHB, the underlying concept can be extended to other polymers. To facilitate broader application, a step-by-step guide for developing similar models is also provided.","PeriodicalId":7802,"journal":{"name":"Analytical Sciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143952227","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

Anion recognition properties of acridine-urea conjugate in bulk and silica nanopore systems. 吖啶-尿素偶联物在体孔和二氧化硅纳米孔体系中的阴离子识别性能。

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-05-07 DOI: 10.1007/s44211-025-00784-y

Sho Kimura, Akira Yamaguchi

{"title":"Anion recognition properties of acridine-urea conjugate in bulk and silica nanopore systems.","authors":"Sho Kimura, Akira Yamaguchi","doi":"10.1007/s44211-025-00784-y","DOIUrl":"https://doi.org/10.1007/s44211-025-00784-y","url":null,"abstract":"This study investigated the anion recognition properties of acridine-urea conjugate (AcU) in bulk DMSO and silica nanopore. The free AcU in bulk DMSO was in tautomeric equilibrium between fluorescent amino form (a-AcU) and non-fluorescent imino form (i-AcU). Owing to this tautomerization of AcU, the free AcU worked as fluorescence enhancement sensing by hydrogen bonds mediated complexation between urea unit and anion. The estimated dissociation constants were 1.4 ± 0.2 mM for CH3COO- and 3.1 ± 1.0 mM for H2PO4-, whereas those for Cl-, ClO4-, and HSO4-were quite large. The hydrogen bond between urea unit and anion was also available for the anion recognition by AcU immobilized at the pore surface of mesoporous silica when the anion concentration is above 0.2 mM. In addition, we found that fluorescence of protonated a-AcU (a-AcHU+) could also be utilized for the recognition of weak acid anions over strong acid anions when the anion concentration is below 0.1 mM. The AcU@MPS with two recognition system has potential application for the anion recognition.","PeriodicalId":7802,"journal":{"name":"Analytical Sciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143973105","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

High-throughput HPLC-SERS capable of generating a spectrum from individual eluent droplets based on a superhydrophobic SERS array. 基于超疏水SERS阵列的高通量HPLC-SERS能够从单个洗脱液液滴产生光谱。

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-05-06 DOI: 10.1007/s44211-025-00761-5

Umi Yamaguchi, Hiroaki Honda, Shusuke Kumagai, Hiroyuki Takei

{"title":"High-throughput HPLC-SERS capable of generating a spectrum from individual eluent droplets based on a superhydrophobic SERS array.","authors":"Umi Yamaguchi, Hiroaki Honda, Shusuke Kumagai, Hiroyuki Takei","doi":"10.1007/s44211-025-00761-5","DOIUrl":"https://doi.org/10.1007/s44211-025-00761-5","url":null,"abstract":"We have developed a protocol for a high-throughput high-performance liquid chromatography-surface enhanced Raman spectroscopy (HPLC-SERS), whereby a 15 μL eluent droplet was captured every second and a series of SERS spectra was obtained to show a time course in the chemical composition within the eluent. To accomplish this, we prepared arrays of SERS spots based on metal film on nanosphere (MFON). Fifty of these spots 3 mm in diameter were formed in a 5 by 10 array format on a special glass slide covered by a hydrophobic coating. In a second version, the SERS spot size was reduced to 1 mm, surrounded by a superhydrophobic area with a contact angle greater than 120 degrees. Here, 2 μL of the eluent droplet was placed on each spot. Heating of the array substrate allowed complete evaporation of the droplet under 3 min, without the adverse coffee ring effect. We demonstrated the utility of such a setup by injecting 1 mM adenine into a portable HPLC instrument and capturing the time course of SERS spectra. We characterize our MFON SERS spots in terms of its dependence on the concentration and incubation time as well as a two-dimensional SERS imaging showing the uniformity in the signal intensity.","PeriodicalId":7802,"journal":{"name":"Analytical Sciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143952746","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

Solid-phase chromogenic method combining molecularly imprinted polymer and Simon reaction for discriminating between methamphetamine and structural analogs. 结合分子印迹聚合物和Simon反应的固相显色方法鉴别甲基苯丙胺和结构类似物。

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-05-06 DOI: 10.1007/s44211-025-00782-0

Koichi Saito, Musashi Abe, Rie Ito, Hiroshi Akiyama

{"title":"Solid-phase chromogenic method combining molecularly imprinted polymer and Simon reaction for discriminating between methamphetamine and structural analogs.","authors":"Koichi Saito, Musashi Abe, Rie Ito, Hiroshi Akiyama","doi":"10.1007/s44211-025-00782-0","DOIUrl":"https://doi.org/10.1007/s44211-025-00782-0","url":null,"abstract":"A systematic analytical method for discriminating methamphetamine (MA) from its structural analogs was developed by combining a solid-phase chromogenic method with the use of a molecularly imprinted polymer (MIP) and Simon reaction. L-proline (Pro), L-hydroxyproline (HYP), N-methylbenzylamine (NMe-BA), and N-isopropylbenzylamine (NIP-BA) were selected as false positives, while tert-butoxycarbonyl derivatized MA (t-Boc-MA) was selected as a false-negative substance. MA and the structural analogs were loaded into SupelMIP™ SPE-Amphetamines cartridges and Simon's reagent was added to the cartridge, then the coloration of the solid-phase gel was observed from outside the cartridge. After elution with a basic solution, Simon's reagent was added to the eluate (first-step eluate), and a change in color tone was observed. The MIP was then heated under acidic conditions, and the analytes were eluted (second-step eluate) with water, basified at pH 10, and the Simon reaction was repeated. Pro and HYP could be discriminated from MA by the color tone of the MIP solid-phase gel, whereas NMe-BA and NIP-BA could be discriminated from MA by the color tone of the first-step eluate. In addition, the color tone of the second-step eluate confirmed the presence of t-Boc-MA.","PeriodicalId":7802,"journal":{"name":"Analytical Sciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143959590","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

Cobalt oxide modified screen-printed carbon electrode for electrochemical detection of high blood pressure treating drug: reserpine. 氧化钴修饰网印碳电极电化学检测高血压治疗药物利血平。

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-05-06 DOI: 10.1007/s44211-025-00781-1

Chenxi Wu, Shengzhou Qiu, Sima Akter, Shaoli Hong, Huihong Liu, Sakil Mahmud

引用次数: 0

Unusual lanthanide ion exchange selectivity modulated via crystalline morphology change of a mixed-metal coordination polymer. 不同寻常的镧系离子交换选择性通过混合金属配位聚合物的晶体形态变化调制。

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-05-02 DOI: 10.1007/s44211-025-00775-z

Yuiko Tasaki-Handa

{"title":"Unusual lanthanide ion exchange selectivity modulated via crystalline morphology change of a mixed-metal coordination polymer.","authors":"Yuiko Tasaki-Handa","doi":"10.1007/s44211-025-00775-z","DOIUrl":"https://doi.org/10.1007/s44211-025-00775-z","url":null,"abstract":"The separation of lanthanides is critical for ensuring supply security of lanthanide elements, and modulating separation selectivity is a significant approach to control this process. The author's research has explored modulating lanthanide ion (Ln3+) exchange selectivity through crystallographic transitions in phosphate ligand-based crystalline coordination polymers (CCPs). This review reports Ln3+ ion exchange in two systems: LnL1, a CCP formed by bis(2-ethylhexyl) phosphate (L1) with Ce3+, Nd3+, and Sm3+, and LnL2, a CCP formed by bis(4-nitrophenyl) phosphoric acid (L2) with Ce3+. In these systems, Ln3+ selectivity deviated from the conventional pattern corresponding to the atomic number in the lanthanide series. This phenomenon can be attributed to spatial constraints of ion exchange sites within the CCP framework: the ion exchange reaction is influenced by both electrostatic interactions and steric effect. When Ln3+ is incorporated into the CCP surface, structural distortion due to the coexistence of two Ln3+ types induces a change in crystal morphology. This change acts as a gate-opening mechanism, facilitating subsequent ion exchange reactions toward the inside of CCP. The combination of two Ln3+ species likely determines the occurrence of a structural transition, finally influencing Ln3+ ion exchange selectivity. While it is challenging to directly apply the systems in this study to a practical separation system, this CCP-specific mechanism involving distortion and transition of the crystal's higher-order structure is expected to contribute to developing a new Ln separation method in the future.","PeriodicalId":7802,"journal":{"name":"Analytical Sciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143956980","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

Low-overpotential and highly sensitive detection of NADH with electrochemically pretreated cup-stacked carbon nanofiber electrodes. 电化学预处理杯状叠碳纳米纤维电极低过电位高灵敏度检测NADH。

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-05-02 DOI: 10.1007/s44211-025-00776-y

Sota Goto, Taiyo Iwasaki, Kikuo Komori

{"title":"Low-overpotential and highly sensitive detection of NADH with electrochemically pretreated cup-stacked carbon nanofiber electrodes.","authors":"Sota Goto, Taiyo Iwasaki, Kikuo Komori","doi":"10.1007/s44211-025-00776-y","DOIUrl":"https://doi.org/10.1007/s44211-025-00776-y","url":null,"abstract":"Cup-stacked carbon nanofibers (CSCNFs), the surface of which provides highly ordered graphene edges and electroactive oxygen-containing functional groups, were investigated as electrode materials for oxidation of β-Nicotinamide adenine dinucleotide (NADH) at low overpotential. The NADH oxidation was facilitated at the CSCNF-modified glassy carbon (CSCNF/GC) electrode, the surface of which was electrochemically activated at -0.40 V (vs. Ag|AgCl) to generate electrochemically reduced electroactive oxygen-containing functional groups. The anodic peak current of NADH oxidation was observed at about + 0.065 V by cyclic voltammetry measurements. The obtained value was negatively shifted by ~ 0.33 and ~ 0.63 V compared with the CSCNF/GC electrode without the electrochemical reductive pretreatment and the GC electrode, respectively. In addition, NADH-dependent glucose dehydrogenase (GDH) molecule-modified CSCNF/GC electrodes enabled the detection of glucose at the low overpotential effectively in the presence of NAD+, which accepts electrons from GDH and then reduces to NADH, after the electrochemical reductive pretreatment. Thus, the electrochemical reductive pretreatment of CSCNF electrodes would be useful for the development of highly sensitive NADH-dependent enzymatic biosensors.","PeriodicalId":7802,"journal":{"name":"Analytical Sciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143965760","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