Malaysian Journal of Analytical Sciences Vol 23 No 5 (2019): 839 - 848

DOI: 10.17576/mjas-2019-2305-09

 

 

 

REMOVAL OF PHTHALATES IN AQUEOS SAMPLES USING NON-IONIC SILICONE SURFACTANT MEDIATED CLOUD POINT EXTRACTION VIA SPECTROPHOTOMETRY

 

(Penyingkiran Ftalat dalam Sampel Akues Menggunakan Teknik Pengekstrakan Titik Awan Surfaktan Silikon Tidak Berionik dengan Spektrofotometri)

 

Pei Wan Ooi¹, Muggundha Raoov Ramachandran², Noorfatimah Yahaya¹, Nik Nur Syazni Mohamed Kamal¹, Kasturi Gopal¹, Nor Aniisah Husin¹, Nur Nadhirah Mohamad Zain¹*

 

¹Integrative Medicine Cluster, Advanced Medical and Dental Institute,

Universiti Sains Malaysia, 13200 Kepala Batas, Penang, Malaysia

²Department of Chemistry, Faculty of Science,

Universiti Malaya, 50603 Kuala Lumpur, Malaysia

 

*Corresponding author:  nurnadhirah@usm.my

 

 

Received: 16 April 2019; Accepted: 29 July 2019

 

 

Abstract

Removal of phthalates in environmental compartments become crucial in recent years due to the growing global concern about the health effects of phthalates. In this study, a greener method based on cloud point extraction procedure was developed for the removal of selected phthalates in environmental samples using non-ionic silicone surfactant (DC193C). The parameters affecting the extraction efficiency, such as the surfactant concentration, salt types, salt concentration, temperature and incubation time were evaluated and optimized. Good linearity with correlation coefficients (R²) in the range of 0.9963 – 0.9988 for all calibration curves was obtained. The proposed method was applied in removing the diethhylhexyl phthalate and dibutyl phthalate in river water samples under optimized conditions with satisfactory recoveries in the range of 82 – 98%.

 

Keywords:  cloud point extraction, non-ionic silicone surfactant, phthalates, spectrophotometry

 

Abstrak

Penyingkiran ftalat dalam alam sekitar menjadi satu isu yang penting kebelakangan ini disebabkan peningkatan kesedaran global mengenai kesan-kesan ftalat terhadap kesihatan. Dalam kajian ini, satu teknik pengekstrakan titik awan yang lebih mesra alam telah dibangunkan untuk penyingkiran ftalat tertentu daripada sampel alam sekitar dengan menggunakan surfaktan silikon tidak berionik DC193C. Faktor-faktor yang mempengaruhi kecekapan pengekstrakan seperti kepekatan surfaktan, jenis garam, kepekatan  garam, suhu dan masa keseimbangan telah dikaji dan dioptimumkan. Kelinearan baik dengan pekali korelasi (R²) dalam julat 0.9963 – 0.9988 telah dicapai untuk semua lengkung tara. Kaedah yang dicadangkan telah digunakan untuk penyingkiran dietilheksil ftalat dan dibutil ftalat dalam sampel alam sekitar yang telah dipilih di bawah keadaan yang optimum dengan perolehan semula yang memuaskan dalam julat 82 – 98 %.

 

Kata kunci:  pengekstrakan titik awan, surfaktan silikon tidak berionik, ftalat, spektrofotometri

 

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