Quantitative analysis of natural antioxidant remaining in various natural rubber types

Suwimon Siriwong, Adisai Rungvichaniwat, Pairote Klinpituksa, Khalid Hamid Musa, Aminah Abdullah

Research output: Contribution to journalArticle

Abstract

Various natural rubber types i.e. air dried sheet (ADS), ribbed smoked sheet No.3 (RSS3) and Standard Thai Rubber 20 (STR20) were collected during early period of yearly tapping season. All samples were analyzed for their total phenolic content (TPC), free radical sea venging assays namely a 2,2'-azinobis-(3-ethylbenzothiazoline)-6-sulphonic acid (ABTS) and oxygen radical absorbance capacity (ORAC). The plasticity retention index (PRI) was also determined. It was found that TPC values calculated as mg gallic acid equivalent (GAE)/100 g ranged from 200.04 to 291.39, 247.09 to 294.95, and 287.32 to 378.90 for ADS, RSS3 and STR20, respectively. The ABTS values calculated as mg trolox equivalent (TE)/100 g rubber were found to be in the range of 44.31 to 93.36, 69.71 to 77.81, and 73.32 to 95.39 for ADS, RSS3 and STR20, respectively. ORAC values calculated as pmol trolox equivalent (TE)/100 g rubber were found to be in a range of 1,559 to 2,173, 2,724 to 3,827, and 2,616 to 4,265 for ADS, RSS3 and STR20, respectively. TPC, ABTS and ORAC values showed high correlation. PRI of ADS, RSS3 and STR20 were in the range of 97.16 to 99.22, 97.77 to 98.91, and 70.31 to 84.60, respectively. PRI values of ADS and RSS3 were not significantly different (confidence, P≤0.05), but both were higher than that of STR20. Moreover, it was found that PRI of STR20 from different sources showed slightly different values and a similar trend was observed for antioxidant obtained in natural rubber.

Original languageEnglish
Pages (from-to)173-179
Number of pages7
JournalJournal of Polymer Materials
Volume33
Issue number1
Publication statusPublished - 1 Jan 2016

Fingerprint

Rubber
Antioxidants
Chemical analysis
Plasticity
Air
Reactive Oxygen Species
Oxygen
Gallic Acid
Acids
Free radicals
Free Radicals
Assays

Keywords

  • Antioxidant
  • Natural rubber
  • Plasticity retention index

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Siriwong, S., Rungvichaniwat, A., Klinpituksa, P., Musa, K. H., & Abdullah, A. (2016). Quantitative analysis of natural antioxidant remaining in various natural rubber types. Journal of Polymer Materials, 33(1), 173-179.

Quantitative analysis of natural antioxidant remaining in various natural rubber types. / Siriwong, Suwimon; Rungvichaniwat, Adisai; Klinpituksa, Pairote; Musa, Khalid Hamid; Abdullah, Aminah.

In: Journal of Polymer Materials, Vol. 33, No. 1, 01.01.2016, p. 173-179.

Research output: Contribution to journalArticle

Siriwong, S, Rungvichaniwat, A, Klinpituksa, P, Musa, KH & Abdullah, A 2016, 'Quantitative analysis of natural antioxidant remaining in various natural rubber types', Journal of Polymer Materials, vol. 33, no. 1, pp. 173-179.
Siriwong, Suwimon ; Rungvichaniwat, Adisai ; Klinpituksa, Pairote ; Musa, Khalid Hamid ; Abdullah, Aminah. / Quantitative analysis of natural antioxidant remaining in various natural rubber types. In: Journal of Polymer Materials. 2016 ; Vol. 33, No. 1. pp. 173-179.
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