Bloodstains can serve as a source of high-value information, allowing for the reconstruction of bloodshed events or identification of the sample donor. However, from the forensic perspective, the evidential potential of blood traces is not fully exploited. This is because despite significant research efforts, to date, no reliable method for estimating time elapsed since bloodstain deposition has been established. Nonetheless, over the last few years (2011–2017), some noteworthy advances have been made in the field of bloodstain dating, therefore the objective of the following paper is to provide a critical review of recently developed methods, with a particular emphasis on spectroscopy-based approaches. Finally, impediments to applying established procedures in routine forensic practice, along with perspectives to improve the future developments of bloodstain dating techniques, are also discussed.

血迹可以用作高价值信息的来源，从而可以重建流血事件或识别样本供体。但是，从法医的角度来看，血液痕迹的证据潜力尚未得到充分利用。这是因为迄今为止，尽管进行了大量的研究工作，但自建立血迹沉积以来，尚无可靠的方法来估计经过的时间。但是，在过去的几年中（2011-2017年），在血迹测年领域取得了一些值得注意的进展，因此，本文的目的是对最近开发的方法进行批判性的综述，尤其着重于光谱学基于方法。最后，在常规取证实践中应用既定程序的障碍，