Determination of the isotopic composition of gadolinium using multicollector inductively coupled plasma mass spectrometry

Supporting Information

Determination of the Isotopic Composition of Gadolinium Using MC-ICPMS

Juan He1,2_{, Lu Yang}2_{*, Xiandeng Hou}3_{, Zoltan Mester}2_{, and Juris Meija}2

1: College of Chemistry, Sichuan University, Chengdu 610064, China

2: National Research Council Canada, 1200 Montreal Rd, Ottawa, Ontario, K1A 0R6, Canada.

3: Analytical & Testing Center, Sichuan University, 29 Wangjiang Rd, Chengdu, Sichuan 610064, China.

* Corresponding author: lu.yang@nrc-cnrc.gc.ca

Table of contents

Table S1. Possible spectral interferences of Gd, Er, and Hf isotopes. Table S2. Atomic masses of gadolinium isotopes.

Data file containing all measurement results is uploaded separately in the Excel file: GADS-1-RawData.xlsx.

Table S1. Possible spectral interferences of Gd, Er, and Hf isotopes Isotopes Possible spectral interferences

152_Gd+ 135_Ba16_O1_H+_, 136_Ce16_O+_, 136_Xe16_O+_, 136_Ba16_O+_, 152_Sm+ 154_Gd+ 137_Ba16_O1_H+_, 138_Ce16_O+_, 138_La16_O+_, 138_Ba16_O+_, 154_Sm+ 155_Gd+ 139_La16_O+ 156_Gd+ 140_Ce16_O+_,156_Dy+ 157_Gd+ 141_Pr16_O+ 158_Gd+ 142_Nd16_O+_, 142_Ce16_O+_,158_Dy+ 160_Gd+ 143_Nd16_O1_H+_,144_Sm16_O+_, 144_Nd16_O+_,160_Dy+ 166_Er+ 149_Sm16_O1_H+_, 150_Nd16_O+_, 150_Sm16_O+ 167_Er+ 150_Nd16_O1_H+_, 150_Sm16_O1_H+_, 151_Eu16_O+ 177_Hf+ 160_Gd16_O1_H+_, 160_Dy16_O1_H+_, 161_Dy16_O+ 178_Hf+ 161_Dy16_O1_H+_, 162_Er16_O+_, 162_Dy16_O+

Table S2. Atomic masses of gadolinium isotopes

Isotopes Atomic mass u, k=1

2 154_{Gd 153.9208734 0.0000013} 155_{Gd 154.9226298 0.0000013} 156_{Gd 155.9221306 0.0000013} 157_{Gd 156.9239679 0.0000013} 158_{Gd 157.9241116 0.0000013} 160_{Gd 159.9270615 0.0000014}