- Applications, possibilities, and limitations of handheld XRF in art conservation and archaeology. Over the last decade the technique of X-ray fluorescence has evolved, from dependence on laboratory-based standalone units to field use of portable and lightweight handheld devices. These portable instruments have given researchers in art conservation and archaeology the opportunity to study a broad range of materials with greater accessibility and flexibility than ever before. This volume focuses specifically on the applications, possibilities, and limitations of handheld XRF in art conservation and archaeology. The papers deal with experimental methodologies, protocols, and possibilities of handheld XRF analysis in dealing with the complexity of materials encountered in this research.