Development of Analytical Method for Determination of Thiosultap-Disodium Residue in Palm Oil Matrix

Yeoh, Chee Beng

doi:10.21894/jopr.2019.0028

Cited by 3 publications

(13 citation statements)

References 4 publications

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“…Metode yang umum digunakan adalah pemisahan antara bahan aktif pestisida dari matriks minyak secara ekstraksi dan adsorpsi. Kuntom et al (1999) telah mengembangkan teknik analisa parakuat diklorida dalam minyak sawit secara adsorpsi dengan adsorben Amberlit dan Duolite menggunakan spektrofotometer UV-Vis. Penelitian ini dilakukan untuk menentukan residu parakuat diklorida pada…”

Section: Perbandingan Metode Pemurnian Dalam Penentuan Residu Parakua...unclassified

“…Penulis yang tidak disertai dengan catatan kaki instansi adalah peneliti pada Pusat Penelitian Kelapa Sawit Hasrul Abdi Hasibuan( ) minyak sawit menggunakan metode yang diadopsi dan dimodifikasi dari teknik yang telah dikembangkan oleh Kuntom et al,(1999) dan ekstraksi secara sentrifugasi.…”

Section: Hasrul Abdi Hasibuan Dan Aga Prima Hardikaunclassified

“…Perolehan kembali dilakukan menggunakan metode adsorpsi dan ekstraksi. Teknik adsorpsi mengadopsi dari Kuntom et al, (1999) sedangkan teknik esktraksi menggunakan sentrifugasi.…”

Section: Uji Perolehan Kembali Parakuat Diklorida Pada Matriks Minyak...unclassified

“…A. Adsorpsi menggunakan resin Amberlit IR-120 dengan preparasi secara pemanasan (adopsi metode Kuntom et al, 1999) Sebanyak 50 g minyak yang mengandung parakuat diklorida dengan konsentrasi tertentu dimasukkan ke dalam labu alas dan ditambahkan 250 ml air dan 25 ml H SO serta 0,1 g NaOH dan 0,2 ml 2 4…”

Section: Uji Perolehan Kembali Parakuat Diklorida Pada Matriks Minyak...unclassified

“…dengan preparasi tanpa pemanasan (modifikasi metode Kuntom et al, 1999) Sebanyak 10 g minyak yang mengandung parakuat diklorida pada konsentrasi tertentu dimasukkan ke dalam erlenmeyer dan ditambahkan 50 ml akuades, 5 ml H SO pekat dan etanol 0,2 ml 2 4…”

Section: B Adsorpsi Menggunakan Resin Amberlit Ir-120unclassified

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Perbandingan Metode Pemurnian Dalam Penentuan Residu Parakuat Diklorida Pada Minyak Sawit

Hasibuan¹,

Hardika²

2020

war

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Parakuat diklorida merupakan bahan aktif herbisida yang digunakan untuk membasmi gulma di perkebunan kelapa sawit. Penggunaan parakuat diklorida yang tidak sesuai dengan standar memungkinkan dapat meninggalkan residu pada minyak sawit (crude palm oil, CPO) sehingga kadarnya perlu ditentukan untuk keamanan produk pangan. Penelitian ini dilakukan untuk menentukan parakuat diklorida pada matriks minyak sawit dengan proses pemurnian (clean up) dan analisa menggunakan spektrofotometer UV-Vis. Proses clean up dilakukan dengan dua cara yaitu adsorpsi dan sentrifugasi. Adsorpsi dilakukan menggunakan Amberlit IR-120 dengan preparasi melalui pemanasan dan tanpa pemanasan. Hasil yang diperoleh menunjukkan bahwa kalibrasi menggunakan spektrofotmeter cukup akurat dengan koefisien korelasi sebesar 0,997, batas minimum deteksi (limit of detection, LOD) sebesar 0,09 ppm dan batas minimum kuantitasi (limit of quantitation, LOQ) sebesar 0,29 ppm. Perolehan kembali parakuat diklorida secara adsorpsi dengan tanpa pemanasan (66,14-77,54%) lebih tinggi dibandingkan dengan pemanasan (65,21-71,73%) dan sentrifugasi (65,21-67,67%). Hasil analisis beberapa sampel CPO menunjukkan bahwa sampel tidak terdeteksi mengandung residu paraquat diklorida

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Section: Perbandingan Metode Pemurnian Dalam Penentuan Residu Parakua...unclassified

Section: Hasrul Abdi Hasibuan Dan Aga Prima Hardikaunclassified

“…Perolehan kembali dilakukan menggunakan metode adsorpsi dan ekstraksi. Teknik adsorpsi mengadopsi dari Kuntom et al, (1999) sedangkan teknik esktraksi menggunakan sentrifugasi.…”

Section: Uji Perolehan Kembali Parakuat Diklorida Pada Matriks Minyak...unclassified

Section: B Adsorpsi Menggunakan Resin Amberlit Ir-120unclassified

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Perbandingan Metode Pemurnian Dalam Penentuan Residu Parakuat Diklorida Pada Minyak Sawit

Hasibuan¹,

Hardika²

2020

war

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Degradation dynamics, residues, processing factors, and dietary risk assessment of bisultap in citrus by LC‐MS/MS

Deng,

Feng,

et al. 2023

J Sci Food Agric

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BACKGROUNDCitrus leaf miners are a common pest that harms citrus production and quality during citrus planting. During the citrus plant's growth phase, the bisultap formulation was frequently used to boost yield and produce fruit of high quality. Research on citrus's dietary risk assessment for bisultap residues, dissipation, and residues, however, is lacking.RESULTSLC‐MS/MS was used to develop an accurate and sensitive analytical method for derivatizing bisultap into nereistoxin in whole fruit, pulp, and peel. At various levels of addition, the mean recovery of bisultap ranged from 84.64 to 111.09% with a reasonable RSD (< 20%). The half‐lives in Guangxi and Guizhou were 3.96 and 6.03 d, respectively. After 14‐21 d of bisultap application, total residues (bisultap and its metabolite nereistoxin) in the whole fruit ranged between < 0.02‐0.228 mg kg‐1 in four experiment sites. And total residue (bisultap and nereistoxin, expressed by bisultap) in whole fruit was approximately 1.05‐7.23 times that of pulp. The washing process with tap water removed 85.71 to 98.78% of the bisultap residue in the whole fruit. Bisultap's risk assessment value in citrus was 0.16 to 1.28%.CONCLUSIONIn the whole citrus fruit, bisultap degrades rapidly. Bisultap residues primarily accumulate on citrus peels, so washing and peeling citrus may effectively remove bisultap residues. For various age groups, the chronic dietary risk of bisultap was acceptable.This article is protected by copyright. All rights reserved.

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Evaluation of Bagworm, Metisa plana (Lepidoptera: Psychidae) Infestation and Beneficial Parasitoid in an Oil Palm Plantation, Perak, Malaysia

Thaer,

Abu Kassim,

Hasbullah

et al. 2021

JSML

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Oil palm (Elaeis guineensis) planting is one of the economic pillars of countries rich in biodiversity in tropical regions. However, pest and disease are the most serious limitation of oil palm production. Bagworm, Metisa plana (Lepidoptera: Psychidae) is considered the most destructive pest in the oil palm plantation in Malaysia, which could cause high yield losses up to 43% over two years after a serious infestation and become a primary concern among stakeholders. Conventional excessive use of pesticides causes serious environmental pollutions and damage to non-target organisms. Thus, biological control can be reduced the pest populations safely and efficiently by beneficial insects such as parasitoids. This study aims to (i) evaluate the bagworm infestation in an oil palm plantation, Perak, Malaysia; (ii) determine the impact and damage of the bagworm stages on the oil palm plantation, and (iii) evaluate the parasitoid in such areas. A total of 57 palm trees have been systematically selected. Bagworm and parasitoid samples were collected in two stages at Felda Gunung Besout 2, Perak, Malaysia. Bagworm infestation severity was performed based on the severity scale of bagworm damage symptoms. The results showed that the incidence rates of oil palm trees are concerned 50.9%, 31.6%, 4%, 3.5% were low, moderate, high, and no incidence, respectively. Bagworm stages 1, 5, 6, and 7 are significantly impacted on the oil palm incidences and stage seven is the most impacted one; followed by stages 1, 6 and 5. Several parasitoids have been found; the highest one is Eulophidae: Tetrastichus s planipennisi.

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Development of Analytical Method for Determination of Thiosultap-Disodium Residue in Palm Oil Matrix

Cited by 3 publications

References 4 publications

Perbandingan Metode Pemurnian Dalam Penentuan Residu Parakuat Diklorida Pada Minyak Sawit

Perbandingan Metode Pemurnian Dalam Penentuan Residu Parakuat Diklorida Pada Minyak Sawit

Degradation dynamics, residues, processing factors, and dietary risk assessment of bisultap in citrus by LC‐MS/MS

Evaluation of Bagworm, Metisa plana (Lepidoptera: Psychidae) Infestation and Beneficial Parasitoid in an Oil Palm Plantation, Perak, Malaysia

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