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Alimuddin Alimuddin
Jurusan Kimia FMIPA Universitas Mulawarman
Chemistry

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VALIDASI METODE PENENTUAN Cd (II) DALAM PUPUK NPK SECARA SPEKTROFOTOMETRI SERAPAN ATOM NYALA DI LABORATORIUM UJI KUALITAS, PT. PUPUK KALIMANTAN TIMUR Leonardus Lewo Hayon; Alimuddin Alimuddin; Aman Sentosa Panggabean
JURNAL KIMIA MULAWARMAN Vol 19 No 1 (2021)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v19i1.898

Abstract

The research about validation method of determination of Cd (II) in NPK fertilizer by Flame Atomic Absorption Spectrophotometry at the Quality Control Laboratory, PT. Pupuk Kaltim has been done. Determination of Cd (II) was done by referring to the Indonesian National Standard (SNI) 2803:2012. Based on the research results obtained by the correlation coefficient (r) was 0.9991; reproducibility with a relative standard deviation (RSD) value was 4.502 % less than 2/3 CV Horwitz was 9.757 and repeatability with a relative standard deviation (RSD) value was 5.225% less than 2/3 CV Horwitz was 9.695; % recovery was in the range of 80-110 % with an average was 98.56 %; limit of detection was 0.056 mg/kg and limit of quantitation was 0,066 mg/kg; uncertainty estimation of measurement with uncertainty components of concentration, volume, mass, precision and purity of the standard solution, obtained the expanded uncertainty value with a 95 % confidence level was ± 0.197 mg/kg and uncertainty percentage value was 10.43 %.
ANALISIS RHODAMIN B PADA SAUS TOMAT YANG BEREDAR DI SAMARINDA MENGGUNAKAN SPEKTROFOTOMETER UV-VIS Diah Kusumaningsih; Alimuddin Alimuddin; Erwin Akkas
JURNAL KIMIA MULAWARMAN Vol 17 No 2 (2020)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v17i2.458

Abstract

Abstract Analysis of rhodamine B in tomato sauce which is distributed in Samarinda city have been done. The identification are used chromatography paper and spectrophotometer UV-Vis in wavelength of 553nm. The result of research are showed in 5 of 20 samples that identified are positive of rhodamin B, which is tomato sauce in spring rools are 2.865 mg/L, tomato sauce in sausage are 2.033 mg/L, tomato sauce in meatball snacks are 2.008 mg/L, tomato sauce in cireng snacks are 1.058 mg/L, and the tomato sauce in tofu snacks 1.756 mg/L. Keywords: Rhodamine B, Chromatography Paper, Spectrophotometer UV-Vis
PEMBUATAN SILIKA GEL DARI ABU AMPAS TEBU (Saccharum Officinarum) DAN APLIKASINYA UNTUK ADSORPSI ION Cu (II) Muhammad Rizky; Alimuddin Alimuddin; Aman Sentosa Panggabean
JURNAL KIMIA MULAWARMAN Vol 20 No 1 (2022)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v20i1.799

Abstract

The research of silica gel manufacturing from cane pulp cinders (Saccharum Officinarum) and the application for Cu (II) ion adsorption has been done. The adsorption of Cu (II) ion done by some variaties, such as pH, concentration, and contact time. The result of the research shows the optimum of pH was 8, concentration optimum was 8 ppm, and contact time was 75 minutes. The perecentage of recovery was 90,28%, shows the effectivity of silica gel from cane pulp cinders can be applicated for adsorption Cu (II) ion.
SINTESIS DAN KARAKTERISASI SILIKA GEL DARI ABU SEKAM PADI DENGAN MENGGUNAKAN NATRIUM HIDROKSIDA (NaOH) Noor Hindryawati; Alimuddin Alimuddin
JURNAL KIMIA MULAWARMAN Vol 7 No 2 (2010)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The synthesis and characterization of silica gel from rice hull ash by using NaOH has been done. The synthesis of silica gel from rice hull ash was done by incineration through a heating for 4 hours with the temperature variation at 700oC, 800 oC, and 900 oC. The product (Rice hull ash) washed with H2SO4 and then continued with Na2EDTA. The silica gel can be synthesized from the rice hull ash by adding H2SO4 solution into the Sodium Silicate (Na2SO3) at temperature 500oC for 30 minutes. The silica gel from the synthesis can be characterized using infrared spectroscopy and X-Ray diffraction. The result of this research showed the same pattern with the comparator silica gel (Kiesel gel 60).
Co-Authors Aman Sentosa Panggabean Diah Kusumaningsih Erwin Akkas Leonardus Lewo Hayon Muhammad Rizky Noor Hindryawati, Noor