纸张中可用于断代的常见化学品检验方法研究

Examination of Common Used Chemicals for Paper Age-determining

为提高纸张质量、降低生产成本,纸张的生产过程中需要加入各类化学品,这些化学品的种类和用量随着造纸技术的进步发生变化,可以成为一种时间指针。对纸张中的化学品进行定性定量分析,依据化学品在纸张工业中使用的上下限年代,可以推断纸张形成年代。本文对若干种纸张常用化学品的检验方法进行了综述,评价了这些方法应用于司法鉴定领域的可能性,最后提出了法庭科学领域纸张断代面临的主要问题和应对方法。

Chemicals are commonly applied by paper-making industry to improve the paper quality and reduce costs.Species and quantity of the chosen chemicals vary with the development of paper-making technology,making them able to indicate a time when they were of the then-conventional choices.Thus,qualitative and quantitative analysis of these chemicals can determine the age of relevant paper according to the time selecting the chemicals.In this paper,examination methods are reviewed about several chemicals commonly used into paper,with the evaluation on their possibility for forensic expertise to apply.Finally,the main problems and countermeasures are put forward of paper age-determining for forensic purpose.