# What is the use of chloroform in the procedure of determining peroxide value?

In this procedure of determining peroxide value, the oil sample is dissolved in acetic acid chloroform solution. I understand that the acid is added so that the following reaction occurs

$\ce{2ROOH + 2H^+ + 2I^- -> 2ROH + I2 + H2O}$.

But what is the point of the added chloroform?

• Probably to help dissolve the sample - think vinegar/oil on salad, which is typically not really homogenous. The sample chemical would still react with the iodide due to the swirling of step 5. – TAR86 Jan 21 '17 at 14:10