Single spike equation using isotope ratios

Single spike equation using isotope ratios 

In many cases, it is more convenient to describe the isotope dilution method using isotopic ratios rather than abundances alone. / j in Eq. (11.1) can be expressed as a function of isotopic ratios in the natural sample and the spike.  

According to Eq. (11.8), q is related to the isotopic ratios of the spike, the natural sample and the mixture by 

Equation (11.11) is very useful for the theory of double spiking that we are going to study later on. On the basis of Eq. (11.9), we have 

Equation (11.13) is written in a manner so that the numerator and the corresponding denominator have the same dimension. 

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Single spike equation using isotope ratios... 

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