Analytical Sciences最新文献

Analytical techniques for arsenic speciation.

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-01-31 DOI: 10.1007/s44211-025-00722-y

Yu-Ki Tanaka, Kemmu Matsuhashi, Yasumitsu Ogra

{"title":"Analytical techniques for arsenic speciation.","authors":"Yu-Ki Tanaka, Kemmu Matsuhashi, Yasumitsu Ogra","doi":"10.1007/s44211-025-00722-y","DOIUrl":"https://doi.org/10.1007/s44211-025-00722-y","url":null,"abstract":"Due to its toxicity, contamination with arsenic, a Group 1 carcinogen, is a significant environmental and public health issue. The toxicity of arsenic varies with its chemical form. For example, inorganic species like arsenite (AsO33-) and arsenate (AsO43-) are generally more toxic than organoarsenic compounds. However, some organoarsenic species exhibit higher toxicity than inorganic species. Therefore, the precise quantification and speciation of arsenic is necessary. Chromatographic techniques, particularly liquid chromatography coupled with inductively coupled plasma mass spectrometry (LC-ICP-MS), are widely used for arsenic speciation owing to their high sensitivity and accuracy. Gas chromatography-mass spectrometry (GC-MS) is another effective technique for detecting arsenic species after derivatization. In addition to chromatographic methods, more straightforward and cost-effective techniques are available for inorganic arsenic speciation. These include adsorption techniques, colorimetric assays such as the molybdenum blue method, hydride generation reactions, and voltammetry. Emerging technologies, such as microfluidic and electrochemical devices, enable rapid and portable analysis, facilitating in situ detection of arsenite and arsenate in environmental samples. While LC-ICP-MS remains the gold standard for comprehensive arsenic speciation, other advanced technologies provide a practical, rapid, and cost-effective approach.","PeriodicalId":7802,"journal":{"name":"Analytical Sciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143073633","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

Magnesium phosphates experienced high-temperature transition found on the CI-like carbonaceous chondrite Yamato 980115 by Raman microspectroscopy.

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-01-31 DOI: 10.1007/s44211-025-00720-0

Hiroharu Yui, Hayato Tsychiya, Aruto Kashima, Shu-Hei Urashima, Kenichi Oguchi, Naoya Imae, Akira Yamaguchi

{"title":"Magnesium phosphates experienced high-temperature transition found on the CI-like carbonaceous chondrite Yamato 980115 by Raman microspectroscopy.","authors":"Hiroharu Yui, Hayato Tsychiya, Aruto Kashima, Shu-Hei Urashima, Kenichi Oguchi, Naoya Imae, Akira Yamaguchi","doi":"10.1007/s44211-025-00720-0","DOIUrl":"https://doi.org/10.1007/s44211-025-00720-0","url":null,"abstract":"Magnesium phosphate grains, minor accessory minerals found on the primitive meteorite Yamato 980115 (Y 980115), were investigated by Raman microspectroscopy. All magnesium phosphate grains found in the present study can be assigned to farringtonite, dehydrated magnesium phosphate Mg3(PO4)2-I. Since the Mg3(PO4)2-I is generally formed via the irreversible thermal transition from the polymorphs of Mg3(PO4)2-II and -III at above 750-800 degree Celsius, we can infer that the parent body of the Y 980115 meteorites experienced thermal alteration with such a high temperature. This result is in good accordance with the previous studies and the proposals on the alteration history of Y 980115 by the electron-beam microscope and X-ray diffraction analyses. Furthermore, the hydrated form of the magnesium phosphates of Mg3(PO4)2·4H2O, Mg3(PO4)2·8H2O, and Mg3(PO4)2·22H2O was not found in the present research, also suggesting that the extensive vaporization of the hydrated water molecules with magnesium phosphate occurred by such high-temperature thermal alteration. Since Y 980115 has been historically categorized to heavily aqueously altered CI (Ivuna-type) carbonaceous chondrites but has distinct characteristic to CI meteorites, the present result would provide further evidence to the complexed alteration history of the parent body of Y 980115 meteorite.","PeriodicalId":7802,"journal":{"name":"Analytical Sciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143063269","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

An imidazo-pyridin derivative as fluorescent probe for the peroxynitrite detection in pulmonary permissive hypercapnia.

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-01-31 DOI: 10.1007/s44211-025-00721-z

Junjun Qin, Mingyue Cheng, Changlin He, Xiong Shen, Zhongquan Zhu

引用次数: 0

Method for extracting elemental sulfur in environmental water and its application to blue tide samples from Tokyo Bay, Japan.

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-01-24 DOI: 10.1007/s44211-025-00717-9

Shogo Sugahara, Hiroto Higa, Mitsuki Iwama, Yoshiyuki Nakamura, Tetsunori Inoue, Yukiko Senga, Michiko Egawa, Yasushi Seike

{"title":"Method for extracting elemental sulfur in environmental water and its application to blue tide samples from Tokyo Bay, Japan.","authors":"Shogo Sugahara, Hiroto Higa, Mitsuki Iwama, Yoshiyuki Nakamura, Tetsunori Inoue, Yukiko Senga, Michiko Egawa, Yasushi Seike","doi":"10.1007/s44211-025-00717-9","DOIUrl":"https://doi.org/10.1007/s44211-025-00717-9","url":null,"abstract":"A simple method for determining elemental sulfur in environmental water was developed and applied to seawater samples collected immediately after the occurrence of blue tides in Tokyo Bay. To investigate the concentration and extraction methods, artificial elemental sulfur was quantitatively produced by oxidizing a sulfide solution with an iodine solution, then used as a standard reagent in the experiments. To concentrate the elemental sulfur in the water sample, glass filter paper (GF/F) was used to filter and collect the elemental sulfur. The elemental sulfur was then extracted using n-hexane, the main component of petroleum ether; however, the recovery of elemental sulfur from the wet glass filter paper was low, and remained so even when the glass filter paper was dried. We, therefore, used a mixture of n-hexane and an acetone solvent, which is a hydrophilic organic solvent, for extraction and succeeded in recovering more than 90% of the elemental sulfur from the wet glass filter paper. Using this solvent mixture, we extracted and quantified elemental sulfur from seawater samples collected after the occurrence of blue tide, and detected 0.36-0.38 mgS L-1 of elemental sulfur in the near-surface layer. We also found that the elemental sulfur concentrations were higher in the surface layer than in the bottom layer. Therefore, we demonstrated that the quantification of elemental sulfur is important to better understand the blue tide phenomenon.","PeriodicalId":7802,"journal":{"name":"Analytical Sciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031784","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

Evaluation method for proteoglycans using near-infrared spectroscopy.

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-01-24 DOI: 10.1007/s44211-025-00715-x

Fumiya Nakamura, Tomoki Ikemizu, Miu Murao, Takashi Isoshima, Daiji Kobayashi, Hideyuki Mitomo, Kuniharu Ijiro, Hiromi Kimura-Suda

{"title":"Evaluation method for proteoglycans using near-infrared spectroscopy.","authors":"Fumiya Nakamura, Tomoki Ikemizu, Miu Murao, Takashi Isoshima, Daiji Kobayashi, Hideyuki Mitomo, Kuniharu Ijiro, Hiromi Kimura-Suda","doi":"10.1007/s44211-025-00715-x","DOIUrl":"https://doi.org/10.1007/s44211-025-00715-x","url":null,"abstract":"Cartilage is a connective tissue composed of mainly water, collagen (COL) and proteoglycans (PGs) including chondroitin sulfate (CS). Near-infrared (NIR) spectroscopy is adequate for examination of soft and hard tissues with large amount of water non-destructively and non-invasively. We measured tablets containing CS and COL using NIR spectroscopy to develop an evaluation method for PGs in cartilage non-destructively and non-invasively. Calibration curves were constructed using the NIR spectra of the tablets that show the quantitative linear relationship between the concentration and height of the second derivative at 4260 cm-1 for COL and at 5800 cm-1 for COL and CS. An equation to calculate the CS-to-COL ratio was derived from the calibrated slopes at 5800 and 4260 cm-1, and the utility of the equation was demonstrated by the evaluation of tablets. Moreover, we conducted an evaluation of the CS-to-COL ratio in the aqueous nucleus pulposus and annulus fibrosus, and the results were consistent with the glycosaminoglycans (GAGs)-to-COL ratios obtained through Raman spectroscopy of the same specimens. Thus, this method is adequate for evaluating PGs with large amount of water non-destructively, non-invasively and with less damage.","PeriodicalId":7802,"journal":{"name":"Analytical Sciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031782","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

Protein diffusion inside nanopores 纳米孔内的蛋白质扩散

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-01-22 DOI: 10.1007/s44211-024-00701-9

Akira Yamaguchi

引用次数: 0

Smartphone digital image colorimetry couple with chemometric approach for determination of boron in nuts prior to deep eutectic solvent liquid-liquid microextraction: a first application of hybrid chemometrics in SDIC. 智能手机数字图像比色法与化学计量法在深度共晶溶剂液-液微萃取前测定坚果中的硼：混合化学计量学在SDIC中的首次应用。

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-01-21 DOI: 10.1007/s44211-024-00710-8

Bashir Ismail Ahmad, Salihu Ismail, Jude Caleb, Suleyman Asir, Abdullahi Garba Usman

{"title":"Smartphone digital image colorimetry couple with chemometric approach for determination of boron in nuts prior to deep eutectic solvent liquid-liquid microextraction: a first application of hybrid chemometrics in SDIC.","authors":"Bashir Ismail Ahmad, Salihu Ismail, Jude Caleb, Suleyman Asir, Abdullahi Garba Usman","doi":"10.1007/s44211-024-00710-8","DOIUrl":"https://doi.org/10.1007/s44211-024-00710-8","url":null,"abstract":"In this research, a green approach utilizing deep eutectic solvent liquid-liquid microextraction is combined with smartphone digital image colorimetry for the determination of boron in nut samples. A smartphone camera was used to capture the image of the analyte extract located in a custom-made colorimetric box. Using ImageJ software, the images were split into RGB channels, with the green channel identified as the optimum. The distance between the cuvette containing the analyte extract and the detection camera was determined to be 8 cm, while the brightness of the light source was 30%. All the images were obtained at 585 nm monochromatic light positioned as a background source. The extraction was achieved with 450 µL of a 1:4 choline-chloride to phenol mole ratio within 60 s and another minute of centrifugation. The limits of detection and quantification were found to be 0.02 and 0.06 µg mL-1, respectively. The method linearity, as indicated by the relative coefficient, was greater than 0.9955 and the relative standard deviations were below 5.4%. Lastly, the application of chemometrics in the form of artificial intelligence (AI)-based models and hybrid machine learning methodologies has been incorporated with SDIC for the quantitative simulation of SDIC parameters. The results gathered showed that these models are capable of predicting the quantitative SDIC parameters.","PeriodicalId":7802,"journal":{"name":"Analytical Sciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142998787","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

Surface-modified carbon quantum dot for enhanced fluorescent-sensing of hexagonal valent chromium. 用于增强六方价铬荧光传感的表面改性碳量子点。

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-01-21 DOI: 10.1007/s44211-025-00716-w

Kangle Shang, Hansong Chen, Wenwen Yang, Yucheng He, Baoyi Liu, Xuxin Yi, Xiaoli Tan, Ming Fang

{"title":"Surface-modified carbon quantum dot for enhanced fluorescent-sensing of hexagonal valent chromium.","authors":"Kangle Shang, Hansong Chen, Wenwen Yang, Yucheng He, Baoyi Liu, Xuxin Yi, Xiaoli Tan, Ming Fang","doi":"10.1007/s44211-025-00716-w","DOIUrl":"https://doi.org/10.1007/s44211-025-00716-w","url":null,"abstract":"As one of the most harmful heavy metal pollutants, hexavalent chromium Cr(VI) is becoming a serious threat to human health. Thus pursuing a remarkably sensitive method to monitor the Cr(VI) concentration in natural conditions is favored for the fast response to prevent harm. In the present work, an ethylenediamine (En) and SiO2-modified wool keratin-based carbon quantum dot (CQD)(En@CQDs@SiO2) fluorescent sensor is prepared, and the En is found to improve the discrimination ability by binding the Cr(VI) with the surface carboxyl groups. Based on these designs, the En@CQDs@SiO2 achieves a significant improvement in the Cr(VI) detection ability, with a detection limit of 6.08 × 10-4 mg/L, which succeeded 6 times over CQDs, and is better than conventional UV-Vis and flame atomic absorption (AAS) techniques. Furthermore, the fluorescent sensor has good relative sensitivity, selectivity, good spectral reproducibility, and excellent structural stability. These properties make the sensor suitable for environmental Cr(VI) detection, which undoubtedly improves the economy and environmental friendliness of the fluorescent sensor.","PeriodicalId":7802,"journal":{"name":"Analytical Sciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142998788","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

Development of a smartphone-assisted multiple colorimetric detection assay for GSH in food based on the degradation of gold nanorods. 基于金纳米棒降解的食品中谷胱甘肽的智能手机辅助多重比色检测方法的开发。

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-01-19 DOI: 10.1007/s44211-024-00711-7

Qiming Chen, Yimeng Gu, Yikai Wang, Zhengrong Lu, Quanling Dong, Zhanmin Liu

{"title":"Development of a smartphone-assisted multiple colorimetric detection assay for GSH in food based on the degradation of gold nanorods.","authors":"Qiming Chen, Yimeng Gu, Yikai Wang, Zhengrong Lu, Quanling Dong, Zhanmin Liu","doi":"10.1007/s44211-024-00711-7","DOIUrl":"https://doi.org/10.1007/s44211-024-00711-7","url":null,"abstract":"Glutathione (GSH) is a tripeptide and natural reducing agent composed of glutamic acid, glycine, and cysteine. Its level in the human body is closely linked to human health, such as diabetes, Alzheimer's disease, and cancer. The supplementation of exogenous GSH could bring health benefits and GSH detection in food is of considerable importance. However, the existing assays for GSH detection such as high-performance liquid chromatography/mass spectrometry, electrochemiluminescence and fluorescent nanoprobe were not satisfactory because of the disadvantages of equipment and site requirements. In this study, a multiple-colorimetric detection assay for GSH was developed based on GSH's reaction with gold nanorods. During the reaction with varying concentrations of GSH, the gold nanorods degraded into spherical nanoparticles with multiple color changes, which could be used to determine GSH concentrations. The transverse surface plasmon resonance absorption peak of gold nanorods (AuNRs) significantly shifted, indicating a novel mechanism distinct from etching or surface coating, which typically altered the longitudinal surface plasmon absorption peak. Under optimized conditions, the assay exhibited commendable specificity and reliability in actual samples. The assay accurately quantified GSH ranging from 1 to 10 µM, with detection limits of 439 nM and 260 nM for spectrophotometry and visual analysis, respectively. It was firstly to use GSH as a reducing agent to react with AuNRs in the presence of AgNO3 and the mechanism was different from etching or surface coating. The study's assay shows potential for detecting GSH in food samples and provides an alternative approach for the development of colorimetric detection assays based on AuNRs.","PeriodicalId":7802,"journal":{"name":"Analytical Sciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142998786","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

Design of triplex-forming peptide nucleic acid-based fluorescent probes for forced intercalation sensing of double-stranded RNA structures. 基于三聚体形成肽核酸的荧光探针的设计，用于双链RNA结构的强制嵌入传感。

IF 1.8 4区化学

Analytical Sciences Pub Date : 2025-01-17 DOI: 10.1007/s44211-024-00713-5

Yusuke Sato, Takaya Sato, En Ting Tabitha Lee, Toshiki Chiba, Takaaki Tanabe, Yukina Yoshino, Seiichi Nishizawa

{"title":"Design of triplex-forming peptide nucleic acid-based fluorescent probes for forced intercalation sensing of double-stranded RNA structures.","authors":"Yusuke Sato, Takaya Sato, En Ting Tabitha Lee, Toshiki Chiba, Takaaki Tanabe, Yukina Yoshino, Seiichi Nishizawa","doi":"10.1007/s44211-024-00713-5","DOIUrl":"10.1007/s44211-024-00713-5","url":null,"abstract":"The diverse functional roles of RNA within cells have led to a growing interest in developing RNA-binding fluorescent probes to investigate RNA functions. In particular, the probes for double-stranded RNA (dsRNA) structures are of significant value given the importance of the secondary and tertiary RNA structures on their biologic functions. This review highlights our recent efforts on the development of triplex-forming peptide nucleic acid (TFP)-based probes for fluorescence sensing of dsRNA structures. We demonstrated that the forced intercalation of asymmetric cyanine dyes integrated as base surrogate within the probes was useful for achieving significant light-up response toward target dsRNAs. We also showed that the TFP probes conjugated with small RNA-binding molecules facilitated the fluorescence sensing of biologic relevant dsRNAs containing unpaired nucleobases. The binding and fluorescence signaling functions of such probes were discussed, emphasizing their potential as analytical tools for studying dsRNA structures.","PeriodicalId":7802,"journal":{"name":"Analytical Sciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142998785","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