A Study on the Quantitative Analysis of Portable XRF for the Components Analysis of Metal Cultural Heritage

Abstract

In this study we conducted component analyses of portable XRF detectors using four Au-Cu alloy standard samples to improve their accuracy by drawing up a calibration curve based on ICP-OES standard values. The portable XRF analysis found absolute errors of 0.3 to 3.7 wt% for Au and 0.2 to 8.2 wt% for Cu, confirming that the error range and standard deviation differed from one detector to another. Furthermore, the calibration curve improved their accuracy, such that the relative error rates of Au and Cu decreased from 9.8% and 14% to 3.5% and 3.7%, respectively. Accordingly, an experiment to confirm the calibration curve was conducted using unknown samples, finding that the measured values of the unknown samples fell on the calibration curve. Therefore, to accurately analyze the components of metal cultural heritage items, it is necessary to prepare a calibration curve for each element after checking whether the detector is suitable for the artifact.

Improved chemometric approach for XRF data treatment: application to the reverse glass paintings from the Lipari collection

“…In this view, XRF investigation performed by portable equipment has found a relevant place in the analysis of objects of artistic interest, thanks to the advantages of non-invasiveness and the possibility to perform the measurement directly at the museum or in the place where the sample is exposed or stored. As a function of the kind of matter under investigation, portable XRF can provide semi-quantitative measurements [16][17][18] or quantitative with standards' calibration 19,20 with a limitation on the depth information. 21 In the case of an investigation on a large collection of similar objects, this limit can be overcome by the consideration that matrix effects, mainly coming from uorescence radiation absorption with the sample matrix, do not strongly inuence the elemental uorescence and that a simple spectra comparison can be enough to highlight differences and similitudes.…”

Investigation Techniques of Arson Fire in Low-Temperature Warehouses Using ED-XRF

“…2018년 충청남도 금산군 소재의 저온창고가 (1) 전소된 화 재가 발생하였고 화재조사 과정에서 방화 (2,3) 가 의심되는 요인이 발견되었다. 화재 발생 전 6개의 화재보험을 가입 한 상태였고, 창고 내에 9억 5천만원 상당의 홍미(홍삼뿌 리)가 있었다는 소유자의 주장과는 다르게 Figure 1 본 논문은 저온창고 화재사례를 바탕으로 비파괴 검사 장비인 energy dispersive X-ray fluorescence (ED-XRF)를 (6)(7)(8) 이용하여 방화현장을 보존한 상태에서 화재원인을 조사할 수 있는 기법을 제시하고자, 연소 촉진제로 사용되는 인화 성 액체(휘발유, 시너, 등유, 경유) (9) 를 시료로 방화현장을 모의하고 ED-XRF를 이용하여 성분함량 변화 등 분석을 진 행하였다 (10)(11)(12) .…”