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X‐ray fluorescence studies on low‐Z elements of straits chinese porcelains using Fe‐55 and Cd‐109 annular sources
Author(s) -
Yap C. T.
Publication year - 1987
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1300160203
Subject(s) - manganese , cobalt , analytical chemistry (journal) , fluorescence , aluminium , mineralogy , materials science , chemistry , metallurgy , optics , physics , environmental chemistry
Elemental analysis from Z = 13 (aluminium) to Z = 27 (cobalt) was made on 37 pieces of Straits Chinese porcelains using energy‐dispersive X‐ray fluorescence technique. These porcelains were produced from the beginning of the nineteenth century up to the Republic period (1912–1939) except 4 pieces which were made recently. It was found that manganese, cobalt, potassium and, to a certain extent, iron were correlated in time. All Ch'ing and Republic pieces containing underglazed blue had Mn/Co ratios between 2 and 4 while the modern pieces had Mn/Co ratios of less than 0.07. A plot of the ratio of the intensity of KK α,1 to that of the coherently scattered MnK α from the Fe‐55 source versus the ratio of the intensity of the FeK α,1 to that of the coherently scattered AgK β from the Cd‐109 source shows that all Ch'ing and Republic pieces cluster together and are quite distinct from the modern pieces. XRF technique therefore provides a simple, fast and, most important of all, non‐destructive method of identifying modern (post World War II) fake reproductions of Straits Chinese porcelains.