Weekly molasses samples from the Louisiana mills for the 2000/01 and the 2001/02 seasons have been analyzed to assess the level of exhaustion of final molasses. Laboratory exhaustion tests support the use of the South African target purity equation, which is considered to be the most appropriate as a benchmark. Relationships have been developed to enable refractometer brix and conductivity ash to be used as reliable substitutes for true solids and sulfated ash. In addition, the two season's samples have been subjected to NIR analysis. Calibrations are excellent, enabling NIR to be used in the future for rapid and reliable assessment of molasses exhaustion. The results of the surveys indicate that C massecuite brix and C massecuite purity play an important part in the achievement of a close approach to the target purity in the factories. Significant reductions in molasses purity can be achieved, with substantial savings for the Louisiana industry. The analyses of monosaccharides indicate the occurrence of Maillard reaction in the massecuites, which hampers good molasses exhaustion.
展开▼
