ASAP-MS无损检测技术在靛蓝染纺织品文物鉴定中的应用

Application of ASAP-MS Nondestructive Testing Technology in Relic Textile Dyed with Indigo

大气压固体分析探针离子源-质谱(ASAP-MS)技术是一种新型无损检测方法,可在大气压条件下实现样品的原位离子化,再进行质谱检测。以植物靛蓝染色丝绸为标样,故宫博物院院藏文物木镶铜镀马鞍坐垫的蓝色包边为测试样,分别采用超高效液相色谱-质谱(UHPLC-MS)和ASAP-MS两种方法进行检测。结果表明:在UHPLC-MS测试时靛蓝染色丝绸样品与马鞍坐垫样品中主要物质的保留时间都在6.60 min左右,于245、285和611 nm处有吸收峰,该物质准分子离子峰([M+H]+)为m/z 263.1,说明两样品中的主要物质均为靛蓝,即马鞍坐垫样品为靛蓝染制物品。ASAP-MS测试也均在两样品中检测到m/z 263.1准分子离子峰,与UHPLC-MS测试结果一致,表明在保护文物完整性基础上,ASAP-MS测试能够对靛蓝染色纺织品进行有效鉴别。

Atmospheric pressure solid analysis probe coupled to mass spectrometry(ASAP-MS), which can realize in-situ ionization of samples under atmospheric pressure, is a new nondestructive testing technology. A silk fabric dyed with indigo was used as the standard sample, and the blue edge of the copper cladding saddle with wood inlaid in the Palace Museum was used as the test sample in this paper. Ultra high performance liquid chromatography-mass spectrometry(UHPLC-MS) and ASAP-MS were used for detection, respectively. The results show that the retention time of main substances of two samples is about 6.60 min, absorption peak appears in 245 nm, 285 nm and 611 nm, and the pseudo-molecular ion peak([M+H]+) is m/z 263.1. The results indicate that the main substance of the two samples is indigo and the saddle sample is dyed with indigo. The pseudo-molecular ion peak m/z 263.1 is also detected by ASAP-MS, and this is consistent with the result of UHPLC-MS. It implies that ASAP-MS can effectively identify cultural relic textiles dyed with indigo and protect their integrity.