Production of litmus paper from mayana extract / by Abigail R. Austria, Harishna B. Catuncan and Ma. Rosario M. Dometita.
Material type:
TextLanguage: English Publication details: Indang, Cavite: Cavite State University- Main Campus, 2005.Description: xiv, 46 pages : illustrations ; 28 cmContent type: - text
- unmediated
- volume
- 676.2 Au7 2005
- Science High School, College of Education (CED)
| Item type | Current library | Collection | Call number | Materials specified | URL | Status | Notes | Date due | Barcode |
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Theses / Manuscripts
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Ladislao N. Diwa Memorial Library Theses Section | Non-fiction | 676.2 Au7 2005 (Browse shelf(Opens below)) | Link to resource | Room use only | RS-469 | 00000939 |
Research Study (General Science Curriculum) Cavite State University.
Includes bibliographical references.
Science High School, College of Education (CED)
ABIGAIL R. AUSTRIA, HARISHNA B. CATUNCAN, MA. ROSARIO M. DOMETITA. Applied Research III, Science High School, Cavite State University, Indang, Cavite, April 2005. PRODUCTION OF LITMUS PAPER FROM MAYANA (Coleus blumei) LEAVES EXTRACT. Adviser: Mrs. Agnes Alimboyoguen
The study entitled “Production of Litmus Paper from Mayana Leaves” was conducted at Catuncan’s Residence from December 2004 to January 2005.
Generally, this study’aimed to produce litmus paper from mayana leaves extract. Specifically, the study aimed to: (1) determine the physical properties of the extracted pigments, (2) determine the color reaction of the extract as an indicator in a neutralization process; (3) calculate the normality of NaOH and HCI solutions; and (4) dhintacterize litmus paper in terms of texture, and color reaction in HCI, HNOs, NaOH, Ca (OH) 2, and NH,OH.
The physical properties of the extracted pigment included the following: color, boiling point, density, specific gravity, pH. The collected extract was dark green on its first week then turned to teal green on its second week onwards. It had a boiling point of 41 ° C. Its density was 0.99 g/ml. The specific gravity was 0.99. The pH obtained was 7, which means that the extract is neutral.
The produced litmus paper was tested by its color reaction to acids and bases. The bases used were Sodium Hydroxide, Calcium Hydroxide, Ammonium Hydroxide and the acids were Hydrochloric acid and Nitric acid. In general, it did not give distinct color to differentiate acids from bases.
The neutralization process turned the color of NaOH solution pinkish brown and turned the color of HCI solution pale yellow. The texture of the litmus paper was slippery. The produced litmus paper turned pale yellow when it was dipped in the bases and turned pinkish brown when it was dipped in the acids that have the reverse result of the neutralization process.
Based on the obtained results, production of litmus paper from mayana leaves extract iis possible but was not a good indicator because it did not give a distinct color to differentiate acids from bases.
Based from the findings of this study, the following recommendation were made:
1. UV — vis spectrophotometer must be employed in the study to determine the amount of anthocyanin pigments present in mayana leaves.
2. Infrared spectrophotometer must also be used to identify the important
functional group present in the mayana leaves.
3. Further study must be done using unheated mayana leaves extract in the production of litmus paper.
4. An alternative method for extracting mayana leaves must be utilized to isolate properly the anthocyanin pigments present in the mayana leaves.
Submitted to the University Library RS-469