Method for reducing memory effect of boron isotope MC-ICP-MS determination

The invention relates to a method for reducing the memory effect of boron isotope MC-ICP-MS determination. The method comprises the following steps: cleaning a pipeline in MC-ICP-MS determination by adopting an NH4NO3 solution; and adopting the NH4NO3 solution as a standard solution and a medium for a sample to be tested. The NH4NO3 solution is adopted to eliminate the memory effect of boron isotope MC-ICP-MS determination, so the method has the advantages of short cleaning time, high cleaning efficiency, small influences on a test result, simple process and small material consumption, is suitable for being promoted and used, and provides theoretic basis and data support for researches in relevant fields. The method for reducing the memory effect of boron isotope MC-ICP-MS determination by adopting NH4NO3 can effectively improve the boron isotope determination efficiency of MC-ICP-MS, and also can effectively improve the stability and the accuracy of the boron isotope ratio result of the MC-ICP-MS.