Abstract Sapodilla fruit (Manilkara zapota) is a climacteric having short shelf life. To extend life, cold temperature storage often used. During storage, one of the parameters that could change malic acid. Malic acid can be measured non-destructively using visible-near infrared (Vis-NIR) spectroscopy. However, measurement VisNIR spectroscopy has limitations, which sensitivity instrument toward...

Digital filtering technique is of great significance in real-time signal processing and analysis, but the stability, efficiency flexibility filter algorithm are important indicators to reflect its application value. In this paper, an adaptive derivative transformation based on Savitzky-Golay was proposed for laser absorption spectroscopy analysis. To demonstrate analysis algorithm, first-order ...