MOISTURE CONTENT MEASUREMENT IN GELATIN: A COMPARISON OF GRAVIMETRIC METHODS USING MOISTURE ANALYZER AND OVEN

Warmiati (Department of Plastic and Rubber Processing Technology, Politeknik ATK Yogyakarta, 55188, Special Distric of Yogyakarta, Indonesia)
Dewi Nurhidayati (Department of Plastic and Rubber Processing Technology, Politeknik ATK Yogyakarta, 55188, Special Distric of Yogyakarta, Indonesia)

Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Vol. 23 No. 1 (2024): Berkala Penelitian Kulit, Sepatu, dan Produk Kulit

The measurement of water content in gelatin samples in the practical activities in the Instrumentation and Polymer Engineering Laboratory is conducted using the gravimetric method with the Moisture Analyzer Sartorius Type MA 45. Meanwhile, the method acknowledged and approved by AOAC International is the Oven method. This research aims to compare the measurement results of the Moisture Analyzer with the reference method, namely the Oven method referring to AOAC, to determine if there is a statistically significant difference in the results. The results of both methods are compared using a paired T-test, yielding a calculated T-value (Tstat) of 0.7519 and a tabulated T-value of 2.2622. These results indicate that Tstat ≤ the tabulated T-value at a 95% confidence level, thus accepting the null hypothesis (H0). This suggests that μa=μb, meaning that there is no significant difference between the two methods. The precision test results for both methods also meet the criteria, with %RSD ≤ 2% and %RSD ≤ 2/3 CV Horwitz.