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All Journal Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Chimica et Natura Acta
Anni Anggraeni
Departemen Kimia UNPAD
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Energy Environmental Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics

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OPTIMIZATION FOR METHOD IN DETERMINATION OF CHLOR CONCENTRATION IN PM2,5 USING EDXRF EPSILON 5 Sri Royani; Muhayatun Santoso; Diah Dwiana Lestiani; Dyah Kumala Sari; Anni Anggraeni
Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Vol 19, No 2 (2018): Agustus 2018
Publisher : BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (388.67 KB) | DOI: 10.17146/jstni.2018.19.2.4356

Abstract

OPTIMIZATION FOR METHOD IN DETERMINATION OF CHLOR CONCENTRATION IN PM2,5 USING EDXRF EPSILON 5. Airborne particulate matter with aerodynamics diameter less than 2.5 µm, PM2.5, is one of air pollutant parameter which have adverse impacts for human health and environment. To minimize those adverse impacts, elemental composition of PM2.5 needs to be characterized so that can be estimated their sources. One of instruments for characterize PM2.5 is Energy Dispersive X-Ray Fluorescence (EDXRF) spectrometer. EDXRF was used for measuring the elemental composition of PM2.5 in Indonesia. This study focused in determination of chlor concentration in PM2.5 since the optimal condition of chlor quantification using EDXRF spectrometer has not been obtained yet, whereas chlor is one of key element which is needed for source identification of air pollution. Concentration of chlor were determined using calibration curve and sensitivity curve methods. Both of curves were performed using Micromatter standards. The multi-element International Atomic Energy Agency (IAEA) reference materials were used for evaluating the accuracy and precision of the procedure. Our measurements result showed good agreement between observed value and certified value. Their accuracy and precision are more than 90%, to ensure the reliability of analytical results, the comparison with the Particles Induced X-ray Emission (PIXE) results from the same samples were also carried out. The result showed that there was good correlation between EDXRF and PIXE results, this is evidenced by the value of R2 is 0.9592. It can be concluded that calibration curve and sensitivity curve can be used to quantify of chlor in PM2.5 accurately.
Karakterisasi Hasil Reaksi Ion Gadolinium (III) dengan Ligan Dibutilditiokarbamat Menggunakan Metode Mekanika Molekular (MM2) Sani Widyastuti Pratiwi; Anni Anggraeni; Husein H. Bahti
Chimica et Natura Acta Vol 10, No 2 (2022)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cna.v10.n2.19139

Abstract

Gadolinium dalam bentuk murni memiliki nilai ekonomis tinggi banyak digunakan untuk keperluan industri, kedokteran, kimia,dan metalurgi. Dibutilditiokarbamat merupakan ligan dengan dua atom sulfur yang berperan sebagai donor atom sehingga dapat membentuk kompleks dengan gadolinium. Dengan simulasi dinamika molekul dapat mempelajari sifat makroskopik suatu sistem melalui simulasi mikroskopik Dalam penelitian ini akan diprediksikan struktur dari senyawa gadolinium(III) dibutilditiokarbamat berdasarkan energi sterik yang dihasilkan dari dinamika molekul dalam berbagai pelarut. Dalam penentuan struktur ini digunakan metoda mekanika molekul (MM2) dengan perangkat lunak CS ChemBio3D Ultra 12.0. Dinamika molekul diatur pada suhu  25°C dengan variasi pelarut. hasil dinamika molekul dari senyawa gadolinium(III) dibutilditiokarbamat menunjukan bahwa energi sterik paling rendah berada pada bilangan koordinasi tujuh pada pelarut asetonitril dengan energi sterik sebesar 136,7473 kkal/mol.
Co-Authors Diah Dwiana Lestiani Dyah Kumala Sari Husein H. Bahti Muhayatun Santoso Sani Widyastuti Pratiwi Sri Royani