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. Author manuscript; available in PMC: 2019 Feb 1.
Published in final edited form as: Int J Mass Spectrom. 2017 Jan 16;414:80–86. doi: 10.1016/j.ijms.2017.01.002

Table 4.

Standards data for 30 analyses of 300 ng–1000 ng of Alfa Aesar W. Errors are 2SE absolute internal precisions. 185Re/184W are the average signal intensity ratios for entire analyses.

Standard # Session ID # W Abundance Type Date 185Re/184W 182W/184WN6/4 2SE 183W/184WN6/4 2SE 182W/184WN6/3 2SE
1 381 1 μg Thick Feb 18, 2016 0.126 0.864893 0.000004 0.467148 0.000002 0.864869 0.000003
2 381 300 ng Thick Feb 19, 2016 0.196 0.864890 0.000005 0.467146 0.000002 0.864866 0.000004
3 382 1 μg Thick Feb 24, 2016 0.115 0.864893 0.000004 0.467149 0.000002 0.864867 0.000003
4 382 1 μg Thick Feb 25, 2016 0.125 0.864893 0.000004 0.467147 0.000002 0.864870 0.000003
5 382 1 μg Thick Feb 29, 2016 0.052 0.864890 0.000004 0.467146 0.000002 0.864869 0.000003
6 382 1 μg Thick March 3, 2016 0.039 0.864893 0.000004 0.467147 0.000002 0.864870 0.000003
Cup Maintenance Performed April 1st, 2016 Mean
2SD(ppm)		 0.864892
4.0		 0.467147
4.3		 0.864869
3.6
7 385 1 μg Thin April 5, 2016 0.048 0.864889 0.000005 0.467144 0.000002 0.864870 0.000004
8 385 1 μg Thick April 6, 2016 0.066 0.864889 0.000004 0.467146 0.000002 0.864866 0.000003
9 385 300 ng Thick April 7, 2016 0.118 0.864890 0.000004 0.467145 0.000002 0.864867 0.000003
10 386 1 μg Thick April 11, 2016 0.162 0.864889 0.000004 0.467145 0.000002 0.864867 0.000003
11 386 1 μg Thick April 12, 2016 0.176 0.864889 0.000004 0.467148 0.000002 0.864866 0.000003
12 386 1 μg Thick April 13, 2016 0.057 0.864887 0.000004 0.467146 0.000002 0.864866 0.000003
13 386 1 μg Thick April 13, 2016 0.088 0.864891 0.000004 0.467146 0.000002 0.864868 0.000003
14 386 500 ng Thin April 14, 2016 0.061 0.864892 0.000004 0.467145 0.000002 0.864870 0.000003
15 386 1 μg Thin April 18, 2016 0.050 0.864890 0.000004 0.467144 0.000002 0.864870 0.000003
16 386 500 ng Thin April 19, 2016 0.096 0.864890 0.000004 0.467145 0.000002 0.864868 0.000003
17 386 1 μg Thick April 19, 2016 0.170 0.864891 0.000004 0.467146 0.000002 0.864869 0.000003
18 386 500 ng Thick April 20, 2016 0.102 0.864884 0.000004 0.467143 0.000002 0.864865 0.000003
19 386 500 ng Thick April 21, 2016 0.164 0.864887 0.000005 0.467146 0.000002 0.864868 0.000004
20 387 1 μg Thin April 25, 2016 0.081 0.864893 0.000004 0.467146 0.000002 0.864871 0.000003
21 387 1 μg Thick May 1, 2016 0.026 0.864893 0.000004 0.467145 0.000002 0.864872 0.000003
22 387 500 ng Thick May 2, 2016 0.312 0.864886 0.000006 0.467143 0.000003 0.864867 0.000004
23 389 500 ng Thin May 16, 2016 0.042 0.864885 0.000004 0.467141 0.000002 0.864868 0.000003
24 389 1 μg Thin May 17, 2016 0.038 0.864888 0.000004 0.467145 0.000002 0.864868 0.000003
25 389 1 μg Thick May 20, 2016 0.022 0.864892 0.000004 0.467147 0.000002 0.864869 0.000003
26 389 1 μg Thick May 22, 2016 0.031 0.864886 0.000004 0.467143 0.000002 0.864866 0.000003
27 390 1 μg Thin May 26, 2016 0.051 0.864888 0.000003 0.467144 0.000001 0.864868 0.000002
28 390 1 μg Thin May 27, 2016 0.031 0.864887 0.000003 0.467143 0.000002 0.864868 0.000002
29 390 1 μg Thin May 30, 2016 0.034 0.864888 0.000004 0.467145 0.000002 0.864867 0.000003
30 390 500 ng Thin June 2, 2016 0.081 0.864887 0.000004 0.467142 0.000002 0.864868 0.000003
Mean
2SD (ppm)		 0.864889
5.7		 0.467145
6.6		 0.864868
3.7