Precise determination of triple Sr isotopes (δ87Sr and δ88Sr) using MC-ICP-MS

► 92Zr/90Zr enables sensitive mass bias correction of δ87Sr and δ88Sr measurements. ► The improved MC-ICP-MS method allows us to omit the SSB procedures. ► 92Zr/90Zr is better than 91Zr/90Zr for Sr isotopes fractionation correction.