Raw Rubber and Chemical Analysis Department
The Raw Rubber & Chemical Analysis Department (RR & CA) specializes in providing essential analytical services to maintain the quality of dry rubber, latex, and rubber processing chemicals, adhering strictly to ISO standard procedures. We offer a wide range of testing and inspection services facilitated by modern equipment and technical expertise in analytical testing. In addition to our comprehensive in-house laboratory testing capabilities, our team excels in assessing in-plant and field quality control procedures, ensuring consistent product quality. RR & CA extends its services to Technically Specified Rubber (TSR) manufacturers in Sri Lanka, offering testing and grading solutions tailored to their specific needs. We actively support the academic community by providing internship opportunities for university students and conducting collaborative research projects with local universities. This collaborative approach fosters innovation and strengthens industry-academic partnerships, driving advancements in rubber technology and quality assurance.
You can discover how RR & CA can contribute to enhancing the quality and reliability of your products through our trusted analytical services and commitment to excellence.
Principal Research Officer
Mrs A P Attanayake, BSc (SL), PhD (SL)
anushaattanayake04@gmail.com
+94 772930553
Dr. A.P. Attanayake has been the Officer In-charge of the Raw Rubber & Chemical Analysis Department since 2005, overseeing the provision of essential analytical services to the rubber industry. With a B.Sc Degree in Chemistry (Special) from the University of Ruhuna and a Ph.D. from the University of Sri Jayewardenapura (2016), she brings extensive academic expertise to her role.
Dr. A.P. Attanayake has represented RRISL at numerous national and international conferences and is recognized as a technical expert by the Sri Lanka Accreditation Board. Her research focuses on enhancing the quality and control of raw rubber and rubber processing chemicals, collaborating closely with industry stakeholders and national universities to drive innovation and operational excellence in the sector.
Under her leadership, the department has pioneered several innovative approaches in raw rubber and chemical analysis, contributing significantly to industry standards and practices. Dr. A.P. Attanayake's initiatives have not only optimized production processes but also fostered sustainable practices within the rubber industry, aligning with global environmental and quality standards.
Research Officer
Mrs. Anuradhi Ranawaka, BSc Hons Sp. (SL)
anuradhiranawaka@gmail.com
+94 768530879
She is the Research Officer at the Raw Rubber & Chemical Analysis Department since January 2024. With a B.Sc Hons. Special Degree in Rubber Technology from Uva Wellassa University (2023), she specializes in providing analytical services tailored for the rubber industry. She contributes to research focused on quality improvement and control of raw rubber and processing chemicals, aiming to enhance product standards and operational efficiency in the sector.
- Development of a analytical test method to determine the concentration of water-soluble bleaching agent
- Development of a analytical test method to determine the Magnesium content of latex
Establishment of latex testing laboratory at Monaragala Sub-Station by providing financial assistance from MAPI.
Introduction of e-testing services to the stakeholders to provide efficient service from RRISL.
The department participated for the proficiency testing programme conducted by Malaysian Rubber Board and showed outstanding performance among 15 international latex testing laboratories
Project “Identification of an alternative natural product to replace bleaching agent used in crepe rubber industry” was completed and findings were published in 7th international research conference of Uva Wellassa University 2023.
Project “Effect of Zinc concentration on latex compound maturity” was completed and findings were published in 7th international research conference of Uva Wellassa University 2023.
Identification of an alternative carbon black source from waste wood ash was investigated.
Collaborative research with University of Ruhuna was completed and research finding were published in international conference on Applied Science, Sabaragamuwa University of Sri Lanka, May 2023.
Special training programme was conducted for the tyre manufacturers & TSR manufacturers in Sri Lanka with the collaboration of Dartonfield Academy.
- A Novel approach to the removal of Magnesium in natural rubber field latex by using cationic exchange resin as an alternative to Diammoinum Hydrogen Phosphate (DAHP).
- Investigating the Effect of Ammonia Concentration on the DRC Value of Natural Rubber Latex.
- Effect of Pestalotiopsis Leaf Fall Disease on Molecular Weight of Latex (Hevea brasiliensis) and Its Impact on Latex Properties.
- Testing, grading and issuing shipping certificates for all TSR produced in the country.
- Testing and issuing quality certificates for different grades of raw rubber produced in the country for local industries and for shippers.
- Analysis of chemicals used for processing raw rubber in the rubber products manufacturing industry, for purity
- Analysis of skim rubber adulteration in scrap grades of crepe rubber.
- Recommendation of chemicals for the industry and analyzing them for percentage purity.
- Testing of finished product such as :
- Rubber gloves for sodium pentachlorophenate content and powder content.
- Rubber content in vulcanized product.
- Contamination of metal ions in dipped products.
- Organizing inter laboratory cross check programs for raw rubber & latex testing laboratories & evaluation of results statistically.
- Trouble Shooting Activities such as Calibration of latex tanks and Insrument Calibration
- Analytical charges are as follows
REVISED TESTING CHARGES – July 2022
Testing charges have been revised with effect from 01.07.2022, as mentioned in the following table.
Note: Please note that Transport charges, Priority charges & Institutional charges have not been added to the toal charges. It should be added to the total charges whenever necessary. Figuers are in LKR.
|
PARAMETER (LATEX) |
TEST METHODS |
APPROVED SAMPLE FEE (RS.) |
|
(LATEX ALL TESTS) (DRC, TSC, VFA, MST, ALKALINITY) |
|
Rs. 7200.00 |
|
Dry Rubber Content (DRC) |
ISO 126 |
Rs. 1200.00 |
|
Total Solid Content (TSC) |
ISO 124 |
Rs. 1000.00 |
|
Volatile Fatty Acid No |
ISO 506 |
Rs. 2500.00 |
|
Mechanical Stability Time |
ISO 35 |
Rs. 1500.00 |
|
Alkalinity (on latex phase) |
ISO 125 |
Rs. 1000.00 |
|
KOH Number |
ISO 127 |
Rs. 2000.00 |
|
Viscosity (Brookfield) |
ISO 1652 |
Rs. 600.00 |
|
Mg Content |
ISO 17403 |
Rs. 2000.00 |
|
pH |
ISO 976 |
Rs. 900.00 |
|
Coagulum content |
ISO 706 |
Rs. 2000.00 |
|
Chemical Stability |
ISO 705 |
Rs. 2500.00 |
|
Phosphate Content |
ISO 19043 |
Rs. 3500.00 |
|
PARAMETER (RAW RUBBER)
|
TEST METHODS |
APPROVED SAMPLE FEE (RS.) |
|
RAW RUBBER ALL TESTS (Dirt, Ash, VM, Nitrogen, Po, PRI, Colour) |
|
Rs. 8700.00 |
|
Dirt Content |
ISO 249 |
Rs. 2500.00 |
|
Ash Content |
ISO 247 |
Rs. 1000.00 |
|
Volatile Matter Content |
ISO 248 |
Rs. 500.00 |
|
Nitrogen Content |
ISO 1656 |
Rs. 1500.00 |
|
Plasticity Number |
ISO 2007 |
Rs. 1000.00 |
|
Plasticity Retention Index |
ISO 2930 |
Rs. 1500.00 |
|
Mooney Viscosity |
ISO 289 |
Rs. 2500.00 |
|
Colour |
ISO 4660 |
Rs. 700.00 |
|
Acetone Extraction |
ISO 1407 |
Rs. 3500.00 |
|
Accelerated Storage Hardening Test (∆ P) |
RRIM |
Rs. 1500.00 |
|
Gel Content |
ISO 17278 |
Rs. 3500.00 |
|
PARAMETER (CHEMICALS) |
TEST METHODS |
APPROVED SAMPLE FEE (RS.) |
|
Sodium sulphite |
Titrimetric |
Rs. 2000.00 |
|
Sodium bi-sulphite (S-meta bi-sulphite) |
Titrimetric |
Rs. 1000.00 |
|
Oxalic Acid |
Titrimetric |
Rs. 1500.00 |
|
Formic Acid |
Titrimetric |
Rs. 2000.00 |
|
Thickness (Polythene) |
- |
Rs. 500.00 |
|
Ammonia strength |
Titrimetric |
Rs. 1500.00 |
|
Sulphuric strength |
Titrimetric |
Rs. 1500.00 |
- Achieving quality infrastructure with modern equipments and obtaining laboratory accreditation.
- Provide testing, inspections and certification service through conformity assessment.
- Maintain in house instrument calibration procedures.
- Increase demand for quality rubber products and raw materials.
- Increase demand for accredited test reports and certificates.
- Inspection of TSR factories for their quality of production process and certified as a registered TSR factory under RRISL.
- Implementation of new test methods and method validation.
- Identification of alternative chemicals to replace toxic and harmful chemicals.
- Identify quality variations in rubber produced in nontraditional areas.
- Recommendation on of new clones with special features targeting specific rubber product.
- Attanayake, A.P., Karunanayake, L. and Nilmini, A.H.R.L., 2018. Effect of ethephon stimulation on natural rubber latex properties; new insight into ethephon stimulation. Journal of the National Science Foundation of Sri Lanka, 46(2), pp.179–185. DOI: http://doi.org/10.4038/jnsfsr.v46i2.8418
- A.P. Attanayake, L. Karunanayake, A.H.R.L. Nilmini (2015). Insight into prevention of enzymatic browning and increase of antioxidant potential of crepe rubber with ethephon stimulation, Journal of Rubber Research Institute of Sri Lanka,95,58-65.
- S. Siriwaradena, A.P. Attanayake, P.H. SarathkumaraN.Karunathilaka, H.V.K Gamage,M.M. A. B. Munasinghe(2012). Raw rubber properties of crepe rubber manufactured from preserved natural rubber latex using different combinations preservatives, Journal of Rubber Research Institute of Sri Lanka, 92,32-43.
- A.P. Attanayake, L. Karunanayake, A.H.R.L. Nilmini, (2015). Viscoelastic properties of stimulated rubber, SJUP international symposium in polymer science, P-12.
- I.D.H.C. Iddamalgoda, A.P. Atthanayaka, N.S.Withanage, N.R.Weerawansa, Property variation of centrifuged latex at different maturity stages in glove manufacturing,Research Symposium of UvaWellassa University, January 29-30, 2015.
- A.P. Attanayake, L. Karunanayake, A.H.R.L. Nilmini (2015). Effect of ethephon concentration on rubber yield through magnesium ion and sucrose regulation in Heveabrasiliensis,YSF symposium 2015.
- L.A.A. Dilmi, A. Attanayake, G.A.A.R. Perera and E.A.L. Lochana (2022). Effects of added ammonium laureate soap on physico-mechanical properties of natural rubber latex, 6th International Research Conference of Uva Wellassa University, July 28 th -29 th 2022.
- R.A.A.P. Ranawaka, A. P. Attanayake ,T.A.R.W.M.M.C.G. Bandara and A.M.W.K. Senevirathna (2022).Effect of Ammonia Preservative Systems in Centrifuged Latex on Phosphate Levels and Latex Film Properties,6th International Research Conference of Uva Wellassa University,July 28 th -29 th.
- D.M.D. A De Zoysa, A. P Attanayake, J. S Hewage, Y.C. Y Sudusinghe, S. A Ranaweera (2023). Replacement of Commercial Carbon Black by Upgraded Pyrolytic Char in Solid Tyre Cushion Compounds, International Conference on Applied Sciences, Sabaragamuwa University of Sri Lanka, 30-31 May 2023.
- W. K Amarasekera, A. P Attanayake, T.A.N. T Perera, A. M.W. K Seneviratne (2024). Impact of varied Znic Concentration Levels on Natural Rubber Latex Film Properties, National Symposium on Agriculture & Life Sciences, Uva Wellassa University,5th January 2024.
- R.M.V.S Ratnayake, A.P Attanayake, G.R.V.S Gamlath, A.M.W.K Seneviratne (2024). Identification of Alternative Bleaching Agent for the Chemical Used in Crepe Rubber Manufacturing. National Symposium on Agriculture & Life Sciences, Uva Wellassa University,5th January 2024.
- A.P Attanayake, C.Lokuge, G.T.SDharmawardana (2015). Appropriate strategy to overcome potential problems in NR latex processing,,RISTCON International conference,University of Ruhuna,Wellamadama.
- K.V.V.S. Kudaligama, V.H.L. Rodrigo and A.P. Attanayake, raw rubber properties of Hevea, P.157- 164,Proeedingsof symposium on plantation crop research, 2010, Colombo, Sri Lanka.
- A.P. Attanayake, D.G.S. Dilshani and C. Lokuge (2011). Novel method to determine DAHP content in natural rubber centrifuged latex and effect of residual magnesium and phosphate ions on latex based dipped products, P. 144-150, Rubber Latex Technology, Vol. 1, 2011.
- A.P. Attanayake, L. Karunanayake, A.H.R.L. Nilmini, Microbial activity in natural rubber latex with different preservative systems, SJUP international symposium in polymer science (2012). Colombo, Sri Lanka.
- A.P. Attanayake, L. Wanigathunga, H.V.K. Gamage, C. Lokuge, D.M.S. Wijesekara, L.P. Vitharana (2014).Raw Rubber Properties of New Clones introduced by Rubber Research Institute of Sri Lanka, IRRDB International Rubber Conference, P-31, Manila, Philliphines.
- A.P Attanayake,C.Lokuge (2012).Introduction of cyanide free test method for the determination of magnesium content in natural rubber latex, Annual Review,RRISL.
- I. H. K.Samarasinghe, U. N Ratnayake, A. P Attanayake, W .M. G.Seneviratne, L.Wanigatunga. (2015). Effect of storage conditions on viscoelastic properties of different grades of latex crepe rubber IRRDB International Rubber Conference IRC-2015,Ho Chi Minch Vietnam, 1st – 3rd November.
- H.W.O.C.Delman, P.E. Kaliyadasa , M.P. Arachchi and A.PAttanayake, Effect of Clone type on Storage Hardening and Gel Content of Raw Natural Rubber,, Research Symposium of UvaWellassa University, January 28, 2016.
- Weerakoon, W.M.T.H ., Attanayake, A.P., Gamage, H.V.K Lokuge, C., Vitharana, L.P.(2016).Effect of processing conditions on raw rubber properties of natural rubber,Sixth symposium on plantation crop research,Colombo,Sri Lanka.
- Lakshman,R.G.A.,Kudaligama,K.V.V.S.,Rodrigo,V.H.L.,Iqbal,S.M.M.,Attanayake,A.P.,Randunu,R.P.S.,Perera,M.K.P.,Madushani,P.D.T.LNadeeshani,A.A.A. (2016).Effectiveness of S/2 d4 Harvesting Systemin the Rubber small Holder sector of Eastern Province of Sri Lanka,Sixth symposium on plantation crop research,Colombo,Sri Lanka.
- A.P Attanayake, L.Karunanayake , A.H.R.L Nilmini(2017).Effect of Ethephon Concentration on Physical Properties of Natural Rubber; A qualitative approach for International Rubber Conference IRC-2017, Jakarta, Indonesia, 18th-20th October./li>
- A.P Attanayake, L.Karunanayake , A.H.R.L Nilmini(2017).The Role of Ethephon Stimulation on the Strength properties of Natural Rubber gumvulcanizate, SJUP international symposium in polymer science (2017). Colombo, Sri Lanka./li>
- E.N.N Nanayakkara, A.P Attanayake, H.G.I.M Wijesinghe, A.M.W.K Seneviratne (2018).Effect of ethephon stimulation on physico- mechanical properties of carbon black filled natural rubber vulcanizate,International Research Symposium, February 1-3.
- A.P Attanayake, M.U.D.S Weerasinghe(2019). Study on Raw Rubber and Rheological Properties of RRISL 203 Clone; Superior Clone for Sustainable Rubber Industry, IRRDB International Rubber Conference IRC-2019,NayPyi Taw, Myanmar,30th September-1st October.
- K.V.V.S Kudaligama,L.T.B.K Fernando,T.H.P.S Fernando,W.G.D Lakmini,H.P.P.S Somasiri,N.P.S.N Karunaratne,A.P Attanayake,V.H.L Rodrigo,P.Seneviratne (2019).Effectiveness of a new ethephon formulation on latex micro diagnosis and yield potential of Heveabrasiliensis,IRRDB International Rubber Conference IRC-2019, Nay Pyi Taw, Myanmar,30th September-1st October.
- N.N M. Arachchi, A.P Attanayake ,A.M.W.K Seneviratne, H.G.I.M Wijesinghe(2019). Reduction of Enzymatic Discolouration of Natural Rubber Latex by Using Antioxidant and MoringaoleiferaLeaf Extract. International Research Symposium, February 7-9.
- Harindra T.N.,Kithmini N.C.Y.,Attanayake,A.P.,Hewage J.S.,Ranaweera A.S.,(2021) Purification of carbon blackgenerated from passenger car tyre pyrolysis for dry rubber industry, RISTCON International conference,University of Ruhuna,Wellamadama.
- M.W.H.N.Siriwardena,A.Attanayake,E.A.LLochana,A.M.W.K Seneviratne., (2021)Effect of residual diammonium hydrogen phosphate content on properties of natural rubber centrifuged latex,5th International Research Conference of Uva Wellassa University,July 1st& 2nd.
- L.A.A. Dilmi, A. Attanayake, G.A.A.R. Perera and E.A.L. Lochana (2022). Effects of added ammonium laureate soap on physico-mechanical properties of natural rubber latex, 6th International Research Conference of Uva Wellassa University, July 28 th -29 th.
- R.A.A.P. Ranawaka, A. P. Attanayake ,T.A.R.W.M.M.C.G. Bandara and A.M.W.K. Senevirathna (2022).Effect of Ammonia Preservative Systems in Centrifuged Latex on Phosphate Levels and Latex Film Properties,6th International Research Conference of Uva Wellassa University,July 28 th -29 th.
- D.M.D. A De Zoysa, A. P Attanayake, J. S Hewage, Y.C. Y Sudusinghe, S. A Ranaweera (2023). Replacement of Commercial Carbon Black by Upgraded Pyrolytic Char in Solid Tyre Cushion Compounds, International Conference on Applied Sciences, Sabaragamuwa University of Sri Lanka, 30-31 May 2023.
- W. K Amarasekera, A. P Attanayake, T.A.N. T Perera, A. M.W. K Seneviratne (2024). Impact of varied Znic Concentration Levels on Natural Rubber Latex Film Properties, National Symposium on Agriculture & Life Sciences, Uva Wellassa University,5th January 2024.
- R.M.V.S Ratnayake, A.P Attanayake, G.R.V.S Gamlath, A.M.W.K Seneviratne (2024). Identification of Alternative Bleaching Agent for the Chemical Used in Crepe Rubber Manufacturing. National Symposium on Agriculture & Life Sciences, Uva Wellassa University,5th January 2024
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