The Amber-Colored Liquid: A Review on the Color Standards, Methods of Detection, Issues and Recommendations. - Muhamad Haziq Hasnul Hadi; Pin Jern Ker; Vimal Angela Thiviyanathan; Shirley Gee Hoon Tang; Yang Sing Leong; Hui Jing Lee; Mahammad Abdul Hannan; Md Zaini Jamaludin; Mohd Adzir Mahdi (Sensors, 2021)