{"title":"Online nonaqueous capillary electrophoresis–mass spectrometry method for the simultaneous screening of synthetic organic dyes","authors":"Joon Yub Kwon, Yun-Cheol Na, Seong Ho Kang","doi":"10.1002/bkcs.70059","DOIUrl":null,"url":null,"abstract":"<p>The increasing sophistication of handwriting forgery techniques highlights the need for reliable document authentication methods. This study reports an online nonaqueous capillary electrophoresis–mass spectrometry method for the simultaneous screening of several synthetic organic dyes, namely methylene blue, malachite green, crystal violet, methyl violet, Victoria blue basic oxide, and rhodamine B. All dyes were analyzed within 18 min under an electric field of 389 V/cm using a nonaqueous running buffer system (pH 4.5; 50 mM ammonium acetate and 850 mM acetic acid in 100% ethanol) and the single-ion monitoring scan mode for signal enhancement. Ink organic dyes in documents handwritten using commercial red and blue ballpoint pens were extracted with ethanol from pieces of paper created by punching and successfully identified using the developed method to validate its applicability to real forensic samples and demonstrate its suitability for the rapid and effective forensic ink analysis coupled with document authentication.</p>","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":"46 9","pages":"882-886"},"PeriodicalIF":2.2000,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bkcs.70059","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of the Korean Chemical Society","FirstCategoryId":"92","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/bkcs.70059","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The increasing sophistication of handwriting forgery techniques highlights the need for reliable document authentication methods. This study reports an online nonaqueous capillary electrophoresis–mass spectrometry method for the simultaneous screening of several synthetic organic dyes, namely methylene blue, malachite green, crystal violet, methyl violet, Victoria blue basic oxide, and rhodamine B. All dyes were analyzed within 18 min under an electric field of 389 V/cm using a nonaqueous running buffer system (pH 4.5; 50 mM ammonium acetate and 850 mM acetic acid in 100% ethanol) and the single-ion monitoring scan mode for signal enhancement. Ink organic dyes in documents handwritten using commercial red and blue ballpoint pens were extracted with ethanol from pieces of paper created by punching and successfully identified using the developed method to validate its applicability to real forensic samples and demonstrate its suitability for the rapid and effective forensic ink analysis coupled with document authentication.
期刊介绍:
The Bulletin of the Korean Chemical Society is an official research journal of the Korean Chemical Society. It was founded in 1980 and reaches out to the chemical community worldwide. It is strictly peer-reviewed and welcomes Accounts, Communications, Articles, and Notes written in English. The scope of the journal covers all major areas of chemistry: analytical chemistry, electrochemistry, industrial chemistry, inorganic chemistry, life-science chemistry, macromolecular chemistry, organic synthesis, non-synthetic organic chemistry, physical chemistry, and materials chemistry.