Development of a micro-XRF system for biological samples based on proton-induced quasimonochromatic X-rays

Atomic spectrometry update – a review of advances in environmental analysis

“…A mXRF system for the analysis of plants 305 was used to measure uptake of Co in vivo from the leaves of the aquatic plant common duckweed (Lemna minor) oating in dilute CoCl 2 solution. Both benchtop and handheld EDXRF systems 306 used for the determination of Ca, Fe, K, Mn, P, S and Si in pressed pellets of sugarcane leaves had similar performance in terms of correlation coefficients for calibration graphs and LODs.…”

2015 Atomic Spectrometry Update – a review of advances in X-ray fluorescence spectrometry and their applications

“…Full details of the novel instrument set-up and the spectrometer were provided and the basic performance was evaluated in a number of ways. In what seems an unnecessarily elaborate excitation scheme, Ploykrachang et al 39 used a 2.5 MeV proton beam to excite a copper foil target whose secondary uorescence was then passed through a polycapillary half lens to deliver a rather uninspiring spot of 250 Â 350 mm 2 onto the sample. The system was used to measure REE dopant inhomogeneity in glass bre optic cables and was able to show inhomogeneity of Er, doped at the 1 atomic % level, although acquisition times were in the range 52 to 105 minutes per image.…”

“…This new sample presentation and instrumentation yielded detection limits for Sr of 5 ng mL À1 on a sample volume of just 1 mL and is an attractive method for hazardous materials although the technology still needs some improvement to eliminate bubble formation in the cells, which compromised the otherwise excellent accuracy of measurements. In what seems an unnecessarily elaborate excitation scheme, Ploykrachang et al 39 used a 2.5 MeV proton beam to excite a copper foil target whose secondary uorescence was then passed through a polycapillary half lens to deliver a rather uninspiring spot of 250 Â 350 mm 2 onto the sample. Rather than use a large area, state of the art SDD, the authors used a conventional Si(PIN) energy dispersive detector in their mapping study of the distribution of Co in the leaves of an aquatic plant oating on a dilute Co solution.…”