Intercept/slope ratio. Theintercept/sloperatioisusedtoconvertthey-

intercept from the response unit (peak area) to the unit of percent related

substance. The intercept/slope ratio should be compared to the proposed

specifications to determine its significance. For example, if the shelf life

specification is 2.0%, an intercept/slope ratio of 0.2% may be considered

significant, as 0.2% represents 10% relative to the specification.