The OleoTest ™ is the result of R&DI project of a Portuguese spinoff, the Castro, Pinto & Costa. The simplicity (no reagents, software or calibration), reliability and low cost of the test provides enforcement of legislation on the control of polar compounds in frying oils. By Portuguese legislation and other, the maximum value of polar compounds shall not exceed 25%, protecting public health and allowing significant savings to companies using oils in frying processes.