Amount of spike added

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trismetals
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Amount of spike added

 I was just wondering if anyone knows how much spike solution can be added to the sample in spiking/fortification?  I've read somewhere that the amount of spike should not go over 10% of the total amount of sample you have.  But the thing is, I cannot find the reference for this.  I forgot where I read this.  Also Thermo Scientific states that it is only 5%.  So I was kind of wondering if you know the % amount for spiking or if you have other references that points to either 5%, 10% or others.  It would be great if you can point me to the reference.

Thanks