Simultaneous Determination of Boron, Bromine and Iodine in Groundwater Samples by Inductively Coupled Plasma-Mass Spectrometry

A method for the determination of boron, bromine and iodine in groundwater samples by inductively coupled plasma-mass spectrometry (ICP-MS) was proposed. Weak ammonia solution (φ=2%) was selected to eliminate the memory effect from iodine. The isotopes of 10B and 79Br were chosen as determination isotopes for the less interference from coexistent elements. Linearity of boron, bromine and iodine are in 0~10000 ng/mL The detection limits of the method for 10B, 79Br and 127I are 0.176 ng/mL, 0.876 ng/mL and 0.132 ng/mL respectively. The recoveries of the method are 94.6%~101.5% for B, 98.3%~104.9% for Br and 96.5%~102.0% for I with precision (RSD,n=12) of 2.86% for B, 3.36% for Br and 2.69% for I.