| Iso_mass | R Documentation | 
Calculate isotope labelled molecular mass
Iso_mass(F, iso)
F,  | 
 chemical formula, case insensitive  | 
iso,  | 
 labelled elements, case insensitive  | 
Yonghui Dong
Iso_mass(F = 'C7H6O4', iso = '[13]C2[2]H3') # Two 13C and three 2H are labled
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