*Fuel Quality Monitoring by Color Detection DOI: http://dx.doi.org/10.5772/intechopen.86531*


### **Table 4.**

*Color Detection*

**88**

**Table 3.**

**Table 2.**

*Diesel fuel specification.*

*Ethanol fuel specification.*

*Biodiesel fuel specification.*

Analytical methods for monitoring gasoline and diesel adulteration were the target of a recent review [2], emphasizing the determination of their different properties, such as density, distillation curve, octane rating, vapor pressure, etc., using physicochemical methods and chromatographic and spectroscopic techniques. Nondestructive analytical methods for identifying off-spec levels of biodiesel in diesel-biodiesel blends and adulteration of the blend have also been covered in a recent review [20], focusing on first-order multivariate calibration models. In this chapter, different colorimetric techniques that can be used in fuel quality control are addressed, especially simple, rapid, low-cost methods that have the potential capacity to detect fuel adulteration in the field.
