Fig. 4From: U–Th isotopic microanalysis of zircon reference materials and KBSI working standardsVariation of a the relative sensitivity factor (RSF) measured for the 91500 zircon (= 2.85 over 238U/232Thmeasured), b the count rate at mass 228, and c the correction factor (CF) measured for the Plešovice zircon [= (238U/232Th)corrected/(230Th/232Th)measured] in the LA-MCICPMS analysis. Symbols are the same as in Fig. 3Back to article page