The Unitorâ„¢ Catalytic Fines Test has been designed to flag up HFO samples that may be contaminated with dangerous levels of cat fines before the fuel has even been pumped aboard. The test is simple to perform, cost effective, and can be completed within a few minutes. The test kit can determine cat fines down to 20 ppm but experimental results demonstrate that the test is capable of identifying those fuel samples that have a cat fine concentration of > 60 ppm (Al + Si), and which therefore exceed the limit recommended by ISO 8217:2012. In fact the test has been specifically designed to provide the crew with a clear sail or don’t sail indication with regards to fuel quality.