Budi Utami, Aliyya Nisa (2026) Pengaruh Jenis Pelarut Asam pada Hidrolisis Tongkol Jagung (Zea Mays L.) Menjadi Gula Reduksi. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Corn cobs are a lignocellulosic waste product that contains cellulose, making them a potential raw material for the production of reducing sugars. This study aimed to determine the effect of the type of acidic solvent on the reducing sugar content resulting from the hydrolysis of corn cobs and to identify the concentration of acidic solvent that yields the highest reducing sugar content. The study was conducted through the stages of raw material preparation, delignification, and hydrolysis. Preparation involved drying at 105°C for 1 hour, size reduction, and sieving through a 40-mesh screen. Delignification was performed using 10% NaOH at 50°C for 4 hours with a liquid-to-solid ratio (SLR) of 1:15. Next, hydrolysis was performed using acetic acid (CH₃COOH), oxalic acid (H₂C₂O₄), phosphoric acid (H₃PO₄), citric acid (C₆H₈O₇), and sulfuric acid (H₂SO₄) at concentrations of 20%, 25%, 30%, 35%, and 40%, respectively, at a temperature of 110°C for 100 minutes at a stirring speed of 150 rpm. Reducing sugar analysis was performed using the Benedict, Luff-Schoorl, and Nelson-Somogyi UV-Vis spectrophotometry methods. The results showed that the delignification process reduced the lignin content from 5.61% to 0.38% and increased the cellulose content from 48.90% to 54.78%. Based on the Luff-Schoorl analysis, the highest reducing sugar content was obtained using a 40% phosphoric acid (H₃PO₄) solvent, amounting to 3.5325%, whereas the results of UV-Vis spectrophotometric analysis showed the highest reducing sugar content of 0.9438% when using H₃PO₄ at a concentration of 20%. These results indicate that the type and concentration of the acid solvent affect the resulting reducing sugar content. Based on the Luff-Schoorl method, the optimal conditions in this study were achieved using phosphoric acid (H₃PO₄) at a 40% concentration, yielding a reducing sugar content of 3.5325%.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > T Technology (General) T Technology > TP Chemical technology T Technology > TP Chemical technology > TP155 Chemical engineering |
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| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | Aliyya Nisa Budi Utami | ||||||||
| Date Deposited: | 12 Oct 2026 03:47 | ||||||||
| Last Modified: | 12 Oct 2026 07:01 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/60663 |
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