主管：中华人民共和国司法部
主办：司法鉴定科学研究院
ISSN 1671-2072  CN 31-1863/N
中国司法鉴定

中国司法鉴定 ›› 2021 ›› Issue (1): 73-77.DOI: 10.3969/j.issn.1671-2072.2021.01.011

• 鉴定科学 • 上一篇    下一篇

TDS-GC/MS法检测黑色中性笔墨迹中挥发性溶剂的历时性变化

孙其然，罗仪文，王雅晨，杨旭，孙维龙   

  1. 司法鉴定科学研究院 上海市司法鉴定专业技术服务平台 司法部司法鉴定重点实验室，上海200063
  • 收稿日期:2020-08-21 出版日期:2021-02-25 发布日期:2021-02-25
  • 通讯作者: 孙维龙，E-mail：sunwl@ssfjd.cn
  • 作者简介:孙其然(1984—)，女，高级工程师，博士，主要从事文检、微量物证专业研究。
  • 基金资助:
    上海市自然科学基金探索类项目(19ZR1478500)；中央科研院所公益专项(GY2018G-5)；上海市司法鉴定专业技术服务平台资助项目(19DZ 2292700)

Study of Diachronic Change of Solvents in Black Gel Ink Entries by TDS-GC/MS

SUN Qiran, LUO Yiwen, WANG Yachen, YANG Xu, SUN Weilong   

  1. Shanghai Forensic Science Platform, Key Laboratory of Forensic Science, Ministry of Justice, Academy of Forensic Science, Shanghai 200063, China
  • Received:2020-08-21 Published:2021-02-25 Online:2021-02-25
  • Contact: SUN Weilong，E-mail：sunwl@ssfjd.cn

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摘要： 目的 应用热脱附-气相色谱/质谱（TDS-GC/MS）分析，研究7支黑色中性笔墨迹中挥发性溶剂的历时性变化规律。方法 选取7支不同品牌的黑色中性笔，分别在A4纸和笔记本上进行一次制样，然后在不同时间点取样，应用所建TDS-GC/MS方法分析墨迹中乙二醇、二甘醇和三甘醇在200余天内的含量变化。结果6支笔中的乙二醇、三甘醇的含量在2个月之内有明显的下降，另1支笔中二甘醇的含量在5个月内还能观察到较明显的下降。目标物的历时性变化趋势能拟合成幂函数或对数函数。不同的纸张、不同的墨水对检测结果均有影响。结论 黑色中性笔墨迹中的挥发性溶剂的含量随时间增加而下降，应用所建TDS-GC/MS方法，能为判断需检墨迹是否处于溶剂含量明显变化的阶段提供依据。

关键词: 文件材料；形成时间；黑色中性笔；挥发性溶剂；热脱附-气相色谱/质谱。

Abstract: Objective To study the diachronic change of volatile solvents in seven black gel ink entries by thermal desorption-gas chromatography/mass spectrometry （TDS-GC/MS）. Methods Seven black gel ink pens of different brands were used to make ink samples on A4 paper and notebook. Then samples were taken at different time points, and analyted by the established TDS-GC/MS method for ethylence glycol, diethylene glycol and triethylene glycol in the ink for more than 200 days. Results The content of ethylene glycol and triethylene glycol in 6 gel ink pens decreased significantly within 2 months, while the content of diethylene glycol in the other pen decreased significantly within 5 months. The diachronic change of the analytes can be fitted into a power function or a logarithmic function. Different paper and ink formula have an impact on the results. Conclusion The content of volatile solvents in black gel ink entries decreases with time. The established TDS-GC/MS method can provide a basis for judging whether the questioned ink sample is at a stage where the solvent changes significantly.

Key words: document material; ink dating; black gel ink; volatile solvents; TDS-GC/MS

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