Why we add buffer 7 and 14 toluene and 2-propanol to crude


Why we add buffer 7 and 1:4 toluene and 2-propanol to crude oil ahead of titrate with Cdcl2 to dtermine H2S in crude oil.And can toluene and 2- propanol be replaced with other solvent in terms of cost and safety.

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Chemistry: Why we add buffer 7 and 14 toluene and 2-propanol to crude
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