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Exact Mass

The following table is a list of the "Exact Masses" for all of the isotopes which might be encountered in a typical geochemical sample. This information can be used to calculate the mass resolution which is required resolve a molecular interference from a species of interest. As an example, the mass resolution which is required to resolve the 40Ca+16O peak from the 56Fe peak is:

resolution = M / dM = 56 / (15.994 + 39.9626 - (55.9349)) = 2478

The Cameca ims 6f can deliver a mass resolution in excess of 5000, however at a mass resolving powers greater than 3000 or 3500 the 6f's low transmission efficiency makes this approach impractical for many geochemical applications.

 

 

isotope element mass abundance (%)
1 H 1.007825037 99.985
2 H 2.014101787 0.015
3 He 3.016029297 0.00014
4 He 4.00260325 99.99986
6 Li 6.0151232 7.5
7 Li 7.0160045 92.5
9 Be 9.0121825 100
10 B 10.0129380 19.9
11 B 11.0093053 80.1
12 C 12 98.90
13 C 13.00335484 1.10
14 N 14.00307401 99.634
15 N 15.00010898 0.366
16 O 15.99491464 99.762
17 O 16.9991306 0.038
18 O 17.99915939 0.200
19 F 18.99840325 100
20 Ne 19.9924391 90.51
21 Ne 20.9938453 0.27
22 Ne 21.9913837 9.22
23 Na 22.9897697 100
24 Mg 23.9850450 78.99
25 Mg 24.9858392 10.00
26 Mg 25.9825954 11.01
27 Al 26.9815413 100
28 Si 27.9769284 92.23
29 Si 28.9764964 4.67
30 Si 29.9737717 3.10
31 P 30.9737634 100
32 S 31.9720718 95.02
33 S 32.9714591 0.75
34 S 33.96786774 4.21
36 S 35.9670790 0.02
35 Cl 34.96885273 75.77
37 Cl 36.96590262 24.23
36 Ar 35.96754561 0.337
38 Ar 37.9627322 0.063
40 Ar 39.9623831 99.6
39 K 38.9637079 93.2581
40 K 39.9639988 0.0117
41 K 40.9618254 6.7302
40 Ca 39.9625907 96.941
42 Ca 41.9586218 0.647
43 Ca 42.9587704 0.135
44 Ca 43.9554848 2.086
46 Ca 45.963689 0.004
48 Ca 47.952532 0.187
45 Sc 44.9559136 100
46 Ti 45.9526327 8.0
47 Ti 46.9517649 7.3
48 Ti 47.9479467 73.8
49 Ti 48.9478705 5.5
50 Ti 49.9447858 5.4
50 V 49.9471613 0.250
51 V 50.9439625 99.750
50 Cr 49.9460463 4.35
52 Cr 51.9405097 83.79
53 Cr 52.9406510 9.50
54 Cr 53.9388822 2.36
55 Mn 54.9380463 100
54 Fe 53.9396121 5.8
56 Fe 55.9349393 91.72
57 Fe 56.9353957 2.2
58 Fe 57.9332778 0.28
59 Co 58.93319778 100
58 Ni 57.9353471 68.27
60 Ni 59.9307890 26.10
61 Ni 60.9310586 1.13
62 Ni 61.9283464 3.59
64 Ni 63.9279680 0.91
63 Cu 62.9295992 69.17
65 Cu 64.9277924 30.83
64 Zn 63.9291454 48.6
66 Zn 65.9260352 27.9
67 Zn 66.9271289 4.1
68 Zn 67.9248458 18.8
70 Zn 69.9253249 0.6
69 Ga 68.9255809 60.1
71 Ga 70.9247006 39.9
70 Ge 69.9242498 20.5
72 Ge 71.9220800 27.4
73 Ge 72.9234639 7.8
74 Ge 73.9211788 36.5
76 Ge 75.9214027 7.8
75 As 74.9215955 100
74 Se 73.9224771 0.9
76 Se 75.9192066 9.0
77 Se 76.9199077 7.6
78 Se 77.9173040 23.5
80 Se 79.9165205 49.6
82 Se 81.916709 9.4
79 Br 78.9183361 50.69
81 Br 80.916290 49.31
78 Kr 77.920397 0.35
80 Kr 79.916375 2.25
82 Kr 81.913483 11.6
83 Kr 82.914134 11.5
84 Kr 83.9115064 57.0
86 Kr 85.910614 17.3
85 Rb 84.9117996 72.165
87 Rb 86.9091836 27.835
84 Sr 83.913428 0.56
86 Sr 85.9092732 9.86
87 Sr 86.9088902 7.00
88 Sr 87.9056249 82.58
89 Y 88.9058560 100
90 Zr 89.9047080 51.45
91 Zr 90.9056442 11.27
92 Zr 91.9050392 17.17
94 Zr 93.9063191 17.33
96 Zr 95.908272 2.78
93 Nb 92.9063780 100
92 Mo 91.906809 14.84
94 Mo 93.9050862 9.25
95 Mo 94.9058379 15.92
96 Mo 95.9046755 16.68
97 Mo 96.9060179 9.55
98 Mo 97.9054050 24.13
100 Mo 99.907473 9.83
96 Ru 95.907596 5.52
98 Ru 97.905287 1.88
99 Ru 98.9059371 12.7
100 Ru 99.9042175 12.6
101 Ru 100.9055808 17.0
102 Ru 101.9043475 31.6
104 Ru 103.905422 18.7
103 Rh 102.905503 100
102 Pd 101.905609 1.02
104 Pd 103.904026 11.14
105 Pd 104.905075 22.33
106 Pd 105.903475 27.33
108 Pd 107.903894 26.46
110 Pd 109.905169 11.72
107 Ag 106.905095 51.839
109 Ag 108.904754 48.262
106 Cd 105.906461 1.25
108 Cd 107.904186 0.89
110 Cd 109.903007 12.49
111 Cd 110.904182 12.80
112 Cd 111.9027614 24.13
113 Cd 112.9044013 12.22
114 Cd 113.9033607 28.73
116 Cd 114.904758 7.49
113 In 112.904056 4.3
115 In 114.903875 95.7
112 Sn 111.904823 1.0
114 Sn 113.902781 0.7
115 Sn 114.9033441 0.4
116 Sn 114.9017435 14.7
117 Sn 116.9029536 7.7
118 Sn 117.9016066 24.3
119 Sn 118.9033102 8.6
120 Sn 119.9021990 32.4
122 Sn 121.903440 4.6
124 Sn 123.905271 5.6
121 Sb 120.9038237 57.3
123 Sb 122.904222 42.7
120 Te 119.904021 0.096
122 Te 121.903055 2.60
123 Te 122.904278 0.908
124 Te 123.902825 4.816
125 Te 124.904435 7.14
126 Te 125.903310 18.95
128 Te 127.904464 31.69
130 Te 129.906229 33.80
127 I 126.904477 100
124 Xe 123.90612 0.10
126 Xe 125.904281 0.09
128 Xe 127.9035308 1.91
129 Xe 128.9047801 26.4
130 Xe 129.9035095 4.1
131 Xe 130.905076 21.1
132 Xe 131.904148 26.9
134 Xe 133.905395 10.4
136 Xe 135.907219 8.9
133 Cs 132.905433 100
130 Ba 129.906277 0.106
132 Ba 131.905042 0.101
134 Ba 133.904490 2.417
135 Ba 134.905668 6.592
136 Ba 135.904556 7.854
137 Ba 136.905816 11.23
138 Ba 137.905236 71.70
138 La 137.907114 0.09
139 La 138.906355 99.91
136 Ce 135.90714 0.19
138 Ce 137.905996 0.25
140 Ce 139.905442 88.48
142 Ce 141.909249 11.08
141 Pr 140.907657 100
142 Nd 141.907731 27.13
143 Nd 142.909823 12.18
144 Nd 143.910096 23.80
145 Nd 144.912582 8.30
146 Nd 145.913126 17.19
148 Nd 147.916901 5.76
150 Nd 149.920900 5.64
144 Sm 143.912009 3.1
147 Sm 146.914907 15.0
148 Sm 147.914832 11.3
149 Sm 148.917193 13.8
150 Sm 149.917285 7.4
152 Sm 151.919741 26.7
154 Sm 153.922218 22.7
151 Eu 150.919860 47.8
153 Eu 152.921243 52.5
152 Gd 151.919803 0.20
154 Gd 153.920876 2.18
155 Gd 154.922629 14.80
156 Gd 155.922130 20.47
157 Gd 156.923967 15.65
158 Gd 157.924111 24.84
160 Gd 159.927061 21.86
159 Tb 158.925350 100
156 Dy 155.924287 0.06
158 Dy 157.924412 0.10
160 Dy 159.925203 2.34
161 Dy 160.926939 18.9
162 Dy 161.926805 25.5
163 Dy 162.928737 24.9
164 Dy 163.929183 28.2
165 Ho 164.930332 100
162 Er 161.928787 0.14
164 Er 163.929211 1.61
166 Er 165.930305 33.6
167 Er 166.932061 22.95
168 Er 167.932383 26.8
170 Er 169.935476 14.9
169 Tm 168.934225 100
168 Yb 167.933908 0.13
170 Yb 169.934774 3.05
171 Yb 170.936338 14.3
172 Yb 171.936393 21.9
173 Yb 172.938222 16.12
174 Yb 173.938873 31.8
176 Yb 175.942576 12.7
175 Lu 174.940785 97.40
176 Lu 175.942694 2.6
174 Hf 173.940065 0.16
176 Hf 175.941420 5.2
177 Hf 176.943233 18.6
178 Hf 177.943710 27.1
179 Hf 178.945827 13.74
180 Hf 179.946561 35.2
180 Ta 179.947489 0.012
181 Ta 180.948014 99.988
180 W 179.946727 0.13
182 W 181.948225 26.3
183 W 182.950245 14.3
184 W 183.950953 30.67
186 W 185.954377 23.6
185 Re 184.952977 37.40
187 Re 186.955765 62.60
184 Os 183.952514 0.02
186 Os 185.953852 1.58
187 Os 186.955762 1.6
188 Os 187.955850 13.3
189 Os 188.958156 16.1
190 Os 189.958455 26.4
192 Os 191.961487 41.0
191 Ir 190.960603 37.3
193 Ir 192.962942 62.7
190 Pt 189.959937 0.01
192 Pt 191.961049 0.79
194 Pt 193.962679 32.9
195 Pt 194.964785 33.8
196 Pt 195.964947 25.3
198 Pt 197.967879 7.2
197 Au 196.966560 100
196 Hg 195.965812 0.15
198 Hg 197.966760 10.1
199 Hg 198.968269 17.0
200 Hg 199.968316 23.1
201 Hg 200.970293 13.2
202 Hg 201.970632 29.65
204 Hg 203.973481 6.8
203 Tl 202.972336 29.524
205 Tl 204.974410 70.476
204 Pb 203.973037 1.4
206 Pb 205.974455 24.1
207 Pb 206.975885 22.1
208 Pb 207.976641 52.4
209 Bi 208.980388 100
232 Th 232.03805381 100
234 U 234.04094740 0.0055
235 U 235.04392525 0.7200
238 U 238.05078578 99.2745

 




Created: 26.08.2009  to top