Laboratory analysis needs a long time and expensive to determine water quality. A tool that can predict water quality by capturing sound vibrations generated by collisions between water samples and light is LPAS (Laser Photo-Acoustic Spectroscopy). To process the data acquired by LPAS. spectrum correction is needed to eliminate data errors when making acquisitions on water samples. https://www.prepobsessedes.shop/product-category/prep-obsessed-moa/