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Ayu Riska, a DIII Chemical Analyst graduate from Politeknik Negeri Bandung, has gained experience in quality control analysis at PT Ultra Sakti since February 2020. Prior to that, Ayu completed a practical internship at PT Pertamina Refinery Unit VI Balongan in May 2019, focusing on product quality testing. Additionally, Ayu conducted research at PT Pertamina Research and Technology Center, where Ayu worked on improving chemical demulsifiers for oil production.