High-Precision In Situ ⁸⁷Sr/⁸⁶Sr Analyses through Microsampling on Solid Samples: Applications to Earth and Life Sciences

Table 2

Cup configuration schemes of static (a) and dynamic (b) mode measurements.

Cup	L4	L3	L2	L1	C (Far)	H1	H2	H3	H4
(a) Static collection mode
		^84Sr	^85Rb	^86Sr	^87Sr	^88Sr
(b) Dynamic collection mode
Jump 1			^85Rb	^85Rb	^86Sr	^87Sr	^88Sr
Jump 2 (main)		^84Sr	^86Sr	^86Sr	^87Sr	^88Sr
Jump 3				^87Sr	^88Sr
Sr double
Combining the measurements from two different magnetic field position (jump 1-2 and jump 2-3 above), it is possible to evaluate two independent ^87Sr/^86Srdouble defined as follows:. The numbers outside the parentheses are relative to the three different magnetic field positions, the subscript of each isotope refers to the cup on which it is measured, and [^88Sr/^86Sr]N is the natural ratio (i.e., 8.375209)