1
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Shang Y, Meng X, Liu J, Song N, Zheng H, Han C, Ma Q. Applications of mass spectrometry in cosmetic analysis: An overview. J Chromatogr A 2023; 1705:464175. [PMID: 37406420 DOI: 10.1016/j.chroma.2023.464175] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 06/19/2023] [Accepted: 06/19/2023] [Indexed: 07/07/2023]
Abstract
Mass spectrometry (MS) is a crucial tool in cosmetic analysis. It is widely used for ingredient screening, quality control, risk monitoring, authenticity verification, and efficacy evaluation. However, due to the diversity of cosmetic products and the rapid development of MS-based analytical methods, the relevant literature needs a more systematic collation of information on this subject to unravel the true potential of MS in cosmetic analysis. Herein, an overview of the role of MS in cosmetic analysis over the past two decades is presented. The currently used sample preparation methods, ionization techniques, and types of mass analyzers are demonstrated in detail. In addition, a brief perspective on the future development of MS for cosmetic analysis is provided.
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Affiliation(s)
- Yuhan Shang
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China
| | - Xianshuang Meng
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China
| | - Juan Liu
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China
| | - Naining Song
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China
| | - Hongyan Zheng
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China
| | - Chao Han
- College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China
| | - Qiang Ma
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China.
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2
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Zhang L, Shen L, Zhong Q, Zhou T. Diluting modulation-based two dimensional-liquid chromatography coupled with mass spectrometry for simultaneously determining multiclass prohibited substances in cosmetics. J Chromatogr A 2023; 1695:463954. [PMID: 37011524 DOI: 10.1016/j.chroma.2023.463954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 03/16/2023] [Accepted: 03/26/2023] [Indexed: 03/29/2023]
Abstract
Developing efficient and comprehensive screening methods for prohibited substances in cosmetics is critical for ensuring the quality and safety of cosmetics used in everyday life. This study proposed a heart-cutting two-dimensional liquid chromatography-mass spectrometry (2D-LC-MS) method based on online diluting modulation for detecting multiclass prohibited substances in cosmetics. The 2D-LC-MS method combines HILIC and RPLC techniques. Compounds near the dead time that the first dimensional HILIC could not separate were transferred to the second dimensional RPLC by valve switch, achieving good separation with a wide range of polarities. Moreover, the online diluting modulation solved the problem of mobile phase incompatibility, realizing an excellent column-head focusing effect and reducing the loss of sensitivity. Besides, the first dimensional analysis did not restrict the flow rate of the second dimensional analysis owing to the diluting modulation. We demonstrated the 2D-LC-MS system by determining 126 prohibited substances in cosmetic products, including hormones, local anesthetics, anti-infectives, adrenergic agents, antihistamines, pesticides, and other chemicals. All correlation coefficients of the compounds were above 0.9950. The LODs and the LOQs ranged from 0.000259 ng/mL to 16.6 ng/mL and 0.000864 ng/mL to 55.3 ng/mL, respectively. The RSDs% for intra-day and inter-day precision were within 6% and 14%, respectively. Compared with conventional one-dimensional liquid chromatography methods, the established method expanded the analytical coverage of cosmetics-prohibited substances with reduced matrix effects for most compounds and improved sensitivity for polar analytes. The results indicated that the 2D-LC-MS method was a powerful tool for screening multiclass prohibited substances in cosmetics.
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Affiliation(s)
- Liping Zhang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Lingling Shen
- Guangzhou Analytical Center, Analytical & Measuring Instruments Division, Shimadzu (China) Co., LTD, Guangzhou, 510010, China
| | - Qisheng Zhong
- Guangzhou Analytical Center, Analytical & Measuring Instruments Division, Shimadzu (China) Co., LTD, Guangzhou, 510010, China
| | - Ting Zhou
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, China.
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3
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Madunil SL, Imasaka T, Imasaka T. Determination of Barbiturates by Femtosecond Ionization Mass Spectrometry. Anal Chem 2022; 94:14691-14698. [PMID: 36229898 DOI: 10.1021/acs.analchem.2c03077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Barbiturates are highly susceptible to dissociation in mass spectrometry (MS) because of their long side chains combined with a nonaromatic ring consisting of several carbonyl and amine groups. As a result, they exhibit extensive α-cleavage and subsequent rearrangement, making the identification of these compounds difficult. Although a library of electron ionization MS (EIMS) is available, most barbiturates have very similar fragment patterns. Accordingly, it would be desirable to develop a technique for soft ionization, providing a molecular ion and large fragment ions as well. In this study, a molecular ion was clearly observed, in addition to large fragment ions, for a variety of barbiturates based on multiphoton ionization MS (MPIMS) using a tunable ultraviolet femtosecond laser as the ionization source (fs-LIMS). This favorable result was achieved when the optimal laser wavelength for minimizing the excess energy remaining in the ionic state was used. An examination of the photofragmentation pathways suggested that an H atom in the side chain was abstracted by an oxygen atom in the carbonyl group in the ring structure thus initiating fragmentation and subsequent rearrangement. Barbiturates that are substituted with alkyl groups (amobarbital and pentobarbital) had narrower spectral regions for optimal ionization than the other barbiturates with alkyl and alkenyl groups (butalbital and secobarbital) and more with alkyl and phenyl groups (phenobarbital). All of the barbiturates studied provided unique mass spectral patterns in fs-LIMS, which was useful for the reliable identification of these compounds in practical trace analysis.
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Affiliation(s)
- Siddihalu Lakshitha Madunil
- Faculty of Design, Kyushu University, 4-9-1, Shiobaru, Minami-ku, Fukuoka 815-8540, Japan.,Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Totaro Imasaka
- Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.,Hikari Giken, Co., 2-10-30, Sakurazaka, Chuou-ku, Fukuoka 810-0024, Japan
| | - Tomoko Imasaka
- Faculty of Design, Kyushu University, 4-9-1, Shiobaru, Minami-ku, Fukuoka 815-8540, Japan.,Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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4
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Sun L, Zhang R, Hu L, Chen X, Lu X, Li Z. Hydrophobic and Rapid-Response Sensor Inks: Array-Based Fingerprinting of Perfumes. ACS APPLIED MATERIALS & INTERFACES 2022; 14:27339-27346. [PMID: 35642335 DOI: 10.1021/acsami.2c03081] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Counterfeited perfumes mixed with inexpensive additives for commercial purposes pose a great threat to cosmetic market competition and human health. Herein, a 24-element, solid-state colorimetric sensor array employing chemo-responsive dye inks for accurate discrimination of a variety of fragrance bases and "sniffing out" real perfumes from adulterated samples was first reported. The physiochemical robustness and gas response kinetics of the sensor array were optimized with the streamlined design of the channel geometry and hydrophobic modification of the sensor substrate. A unique and distinguishable color change profile was obtained within 2 min exposure of diluted vapor that enabled clear fingerprinting of chemically similar perfume samples. Four commercial perfume products were successfully distinguished and categorized according to their similarity to relevant perfume bases using chemometric methods including hierarchical clustering and principal component analysis. The sensor array also allows the discrimination of ethanol-diluted fragrance bases from the pristine sample, revealing its potential for quality assurance of perfumes and other cosmetics. Such easy-to-use, disposable, and miniaturized chemical sensing detectors therefore prove exceptionally valuable for fast analysis of luxuries such as perfumes and other industrial products with complex chemical compositions.
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Affiliation(s)
- Linlin Sun
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong 518060, P. R. China
| | - Ruohan Zhang
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong 518060, P. R. China
| | - Luoyu Hu
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong 518060, P. R. China
| | - Xiaofeng Chen
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong 518060, P. R. China
| | - Xiaohui Lu
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong 518060, P. R. China
| | - Zheng Li
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong 518060, P. R. China
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong 518060, P. R. China
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5
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Yoshinaga K, Hao NV, Imasaka T, Imasaka T. Miniature time-of-flight mass analyzer for use in combination with a compact highly-repetitive femtosecond laser ionization source. Anal Chim Acta 2022; 1203:339673. [DOI: 10.1016/j.aca.2022.339673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 03/01/2022] [Accepted: 03/01/2022] [Indexed: 11/24/2022]
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6
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Imasaka T, Imasaka T. Femtosecond ionization mass spectrometry for chromatographic detection. J Chromatogr A 2021; 1642:462023. [PMID: 33714081 DOI: 10.1016/j.chroma.2021.462023] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 02/13/2021] [Accepted: 02/23/2021] [Indexed: 11/17/2022]
Abstract
Mass spectrometry is now in widespread use for the detection of the analytes separated by chromatography. Electron ionization is the most frequently used method in mass spectrometry. However, this ionization technique sometimes suffers from extensive fragmentation of analytes, which makes identification difficult. A photoionization technique has been developed for suppressing this fragmentation and for subsequently observing a molecular ion. A variety of lasers have been employed for the sensitive and selective ionization of organic compounds. A femtosecond laser has a high peak power and is preferential for efficient ionization as well as for suppressing fragmentation, providing valuable information concerning molecular weight and chemical structure as well. In this review, we report on applications of femtosecond ionization mass spectrometry combined with gas chromatography.
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Affiliation(s)
- Totaro Imasaka
- Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; Hikari Giken, Co., 2-10-30, Sakurazaka, Chuou-ku, Fukuoka 810-0024, Japan
| | - Tomoko Imasaka
- Department of Environmental Design, Faculty of Design, Kyushu University, 4-9-1, Shiobaru, Minami-ku, Fukuoka 815-8540, Japan.
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7
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Cobo-Golpe M, Ramil M, Cela R, Rodríguez I. Portable dehumidifiers condensed water: A novel matrix for the screening of semi-volatile compounds in indoor air. CHEMOSPHERE 2020; 251:126346. [PMID: 32135372 DOI: 10.1016/j.chemosphere.2020.126346] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 02/20/2020] [Accepted: 02/25/2020] [Indexed: 06/10/2023]
Abstract
The comprehensive identification of organic species existing in indoor environments is a key issue to understand their impact in human health. This study proposes the analysis of condensed water samples, collected with portable dehumidifiers, to characterize semi-volatile compounds in the gas phase of confined areas. Water samples are concentrated by solid-phase extraction (SPE). The obtained extracts are analysed by gas chromatography (GC) time-of-flight mass spectrometry (TOF-MS), following a non-target screening data mining approach. In first term, spectra of deconvoluted compounds are compared with those in NIST low resolution library; thereafter, tentative identifications are verified using an in-house database of accurate electron ionization (EI) MS spectra. Chromatographic (retention index) and spectral data are combined for unambiguous species identification. The potential of condensed water samples to reflect changes in the composition of indoor atmospheres, the match between data obtained using different dehumidifiers, and the relative concentration efficiency of condensed water compared to that attained by active sampling of moderate air volumes are discussed. A total of 141 semi-volatile compounds were identified (98 confirmed against authentic standards) in a set of 21 samples obtained from different homes and working places. This list contains more than 40 fragrances (including several potential allergens), solvents and intermediates in the production of polymeric materials, plasticizers and flame retardants.
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Affiliation(s)
- M Cobo-Golpe
- Department of Analytical Chemistry, Nutrition and Food Sciences, Institute of Research on Chemical and Biological Analysis (IAQBUS), Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - M Ramil
- Department of Analytical Chemistry, Nutrition and Food Sciences, Institute of Research on Chemical and Biological Analysis (IAQBUS), Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - R Cela
- Department of Analytical Chemistry, Nutrition and Food Sciences, Institute of Research on Chemical and Biological Analysis (IAQBUS), Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - I Rodríguez
- Department of Analytical Chemistry, Nutrition and Food Sciences, Institute of Research on Chemical and Biological Analysis (IAQBUS), Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain.
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8
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Ju T, Yoshinaga K, Imasaka T, Nakamura H, Imasaka T. Time-correlated Single Ion Counting Mass Spectrometer with Long and Short Time-of-Flight Tubes and an Evaluation of Its Performance for Use in Trace Analysis of Allergenic Substances. ANAL SCI 2020; 36:539-543. [PMID: 31956162 DOI: 10.2116/analsci.19sbp03] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 01/09/2020] [Indexed: 08/09/2023]
Abstract
An analyte molecule was ionized using a femtosecond laser as the ionization source and was measured by a twin-type time-of-flight mass spectrometer with long (42 cm) and short (6.4 cm) flight tubes. The signal was measured using an analog signal digitizer and a time-correlated single ion counting system, and performance was evaluated by comparing data obtained from both instruments. The short mass spectrometer had a mass resolution of 450 and was used in the trace analysis of allergenic substances in a fragrance.
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Affiliation(s)
- Tiantian Ju
- Division of International Strategy, Center of Future Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Katsunori Yoshinaga
- Division of International Strategy, Center of Future Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- Department of Environmental Design, Faculty of Design, Kyushu University, 4-9-1 Shiobaru, Minami, Fukuoka, 815-8540, Japan
| | - Tomoko Imasaka
- Department of Environmental Design, Faculty of Design, Kyushu University, 4-9-1 Shiobaru, Minami, Fukuoka, 815-8540, Japan.
| | - Hiroshi Nakamura
- Division of International Strategy, Center of Future Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Totaro Imasaka
- Division of International Strategy, Center of Future Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- Hikari Giken, Co., 2-10-30 Sakurazaka, Chuo, Fukuoka, 810-0024, Japan
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9
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Nakano Y, Imasaka T, Imasaka T. Generation of a Nearly Monocycle Optical Pulse in the Near-Infrared Region and Its Use as an Ionization Source in Mass Spectrometry. Anal Chem 2020; 92:7130-7138. [DOI: 10.1021/acs.analchem.0c00542] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yuta Nakano
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Tomoko Imasaka
- Department of Environmental Design, Faculty of Design, Kyushu University, 4-9-1 Shiobaru, Minami-ku, Fukuoka 815-8540, Japan
| | - Totaro Imasaka
- Division of International Strategy, Center of Future Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Hikari Giken, Co., 2-10-30, Sakurazaka, Chuou-ku, Fukuoka 810-0024, Japan
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10
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Madunil SL, Imasaka T, Imasaka T. Resonant and non-resonant femtosecond ionization mass spectrometry of organochlorine pesticides. Analyst 2020; 145:777-783. [DOI: 10.1039/c9an01861a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The ionization mechanism was studied based on resonance-enhanced two-photon ionization and non-resonant two- and three-photon ionizations.
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Affiliation(s)
| | - Totaro Imasaka
- Division of International Strategy
- Center of Future Chemistry
- Kyushu University
- Fukuoka 819-0395
- Japan
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11
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Son VV, Nakamura H, Imasaka T, Imasaka T. Determination of nerve agent metabolites in human urine by femtosecond laser ionization mass spectrometry using 2-(bromomethyl)naphthalene as a derivatizing reagent. Anal Chim Acta 2019; 1069:82-88. [DOI: 10.1016/j.aca.2019.04.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 03/22/2019] [Accepted: 04/08/2019] [Indexed: 12/01/2022]
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12
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The survey of analytical methods for sample preparation and analysis of fragrances in cosmetics and personal care products. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.01.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Yang X, Imasaka T, Imasaka T. Determination of Pesticides by Gas Chromatography Combined with Mass Spectrometry Using Femtosecond Lasers Emitting at 267, 400, and 800 nm as the Ionization Source. Anal Chem 2018; 90:4886-4893. [PMID: 29509001 DOI: 10.1021/acs.analchem.8b00537] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A standard sample mixture containing 51 pesticides was separated by gas chromatography (GC), and the constituents were identified by mass spectrometry (MS) using femtosecond lasers emitting at 267, 400, and 800 nm as the ionization source. A two-dimensional display of the GC/MS was successfully used for the determination of these compounds. A molecular ion was observed for 38 of the compounds at 267 nm and for 30 of the compounds at 800 nm, in contrast to 27 among 50 compounds when electron ionization was used. These results suggest that the ultraviolet laser is superior to the near-infrared laser for molecular weight determinations and for a more reliable analysis of these compounds. In order to study the conditions for optimal ionization, the experimental data were examined using the spectral properties (i.e., the excitation and ionization energies and absorption spectra for the neutral and ionized species) obtained by quantum chemical calculations. A few molecules remained unexplained by the currently reported rules, requiring additional rules for developing a full understanding of the femtosecond ionization process. The pesticides in the homogenized matrix obtained from kabosu ( citrus sphaerocarpa) were measured using lasers emitting at 267 and 800 nm. The pesticides were clearly separated and measured on the two-dimensional display, especially for the data measured at 267 nm, suggesting that this technique would have potential for use in the practical trace analysis of the pesticides in the environment.
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Affiliation(s)
- Xixiang Yang
- Department of Applied Chemistry, Graduate School of Engineering , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
| | - Tomoko Imasaka
- Department of Environmental Design, Graduate School of Design , Kyushu University , 4-9-1, Shiobaru , Minami-ku, Fukuoka 815-8540 , Japan
| | - Totaro Imasaka
- Division of International Strategy, Center of Future Chemistry , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
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14
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Yamamoto H, Ishigami H, Uchimura T. Online Monitoring of a Styrene Monomer and a Dimer in an Emulsion via Laser Ionization Time-of-Flight Mass Spectrometry. ANAL SCI 2018; 33:731-733. [PMID: 28603195 DOI: 10.2116/analsci.33.731] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Laser ionization time-of-flight mass spectrometry was applied to the online monitoring of a styrene monomer and dimer in an emulsion. During the measurement of a styrene monomer oil-in-water emulsion for this study, a styrene dimer, 1,3-diphenylpropane, was dropped into the emulsion. As a result, signal spikes from both analytes occurred simultaneously, which suggested that either the dimer had moved to the monomer droplets or that the monomer and dimer droplets had aggregated. We concluded that this method could be useful for the direct monitoring of monomers and oligomers in the early stages of emulsion polymerization.
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Affiliation(s)
- Hikaru Yamamoto
- Department of Materials Science and Engineering, Graduate School of Engineering, University of Fukui
| | - Hidaka Ishigami
- Department of Materials Science and Engineering, Graduate School of Engineering, University of Fukui
| | - Tomohiro Uchimura
- Department of Materials Science and Engineering, Graduate School of Engineering, University of Fukui
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15
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Pérez-Outeiral J, Elcoroaristizabal S, Amigo JM, Vidal M. Development and validation of a method for the determination of regulated fragrance allergens by High-Performance Liquid Chromatography and Parallel Factor Analysis 2. J Chromatogr A 2017; 1526:82-92. [DOI: 10.1016/j.chroma.2017.10.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 10/11/2017] [Accepted: 10/12/2017] [Indexed: 10/18/2022]
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16
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Meng X, Bai H, Guo T, Niu Z, Ma Q. Broad screening of illicit ingredients in cosmetics using ultra-high-performance liquid chromatography-hybrid quadrupole-Orbitrap mass spectrometry with customized accurate-mass database and mass spectral library. J Chromatogr A 2017; 1528:61-74. [DOI: 10.1016/j.chroma.2017.11.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 10/30/2017] [Accepted: 11/02/2017] [Indexed: 11/25/2022]
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17
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Hamachi A, Imasaka T, Nakamura H, Li A, Imasaka T. Determination of Nerve Agent Metabolites by Ultraviolet Femtosecond Laser Ionization Mass Spectrometry. Anal Chem 2017; 89:5030-5035. [DOI: 10.1021/acs.analchem.7b00386] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Akifumi Hamachi
- Department
of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744
Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Tomoko Imasaka
- Laboratory
of Chemistry, Graduate School of Design, Kyushu University, 4-9-1
Shiobaru, Minami-ku, Fukuoka 815-8540, Japan
| | - Hiroshi Nakamura
- Division
of International Strategy, Center of Future Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Adan Li
- Division
of International Strategy, Center of Future Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Totaro Imasaka
- Division
of International Strategy, Center of Future Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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