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All Journal Alchemy : Journal of Chemistry Jurnal Matematika & Sains JURNAL PENELITIAN SAINTIKA Indonesian Journal of Chemistry Indonesian Journal of Chemical Analysis (IJCA) EKOLOGIA : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup Warta AKAB
Muhammad Bachri Amran
Analytical Chemistry Research Group, Institut Teknologi Bandung, Jl. Ganesha No 10, Bandung 40132, Indonesia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Environmental Science Materials Science & Nanotechnology Mathematics

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Ekstraksi dan Pemisahan Penisilin G dari Fenilasetat dengan Teknik Membran Cair Emulsi Imam Santoso; Buchari Buchari; Muhammad Bachri Amran; Aminudin Sulaeman
Jurnal Matematika & Sains Vol 12, No 3 (2007)
Publisher : Institut Teknologi Bandung

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Abstract

The separation and purification of penicillin G from phenyl acetic acid (PAA) is very difficult to be carried out becausethe two compounds are weak acids and the two compounds can change from one to another by influence of pH. The aimof this research is to establish the optimal conditions for the extraction and separation of penicillin G from phenylaceticacid using the emulsion liquid membrane technique. The optimal conditions were ratio of internal phase volume tomembrane phase volume of 1:1; time of stiring for emulsion preparation of 1 minute; emulsion contact rate of 300 rpm;emulsion contact time of 15 minutes; rate of stirring of emulsion of 2000 rpm; rest time of emulsion of 13 minutes;concentration of penicillin G as external phase 375 ppm; and concentration of surfactant 5% (v/v). At these conditionspenicillin G can be extracted and separated from phenylacetic acid with a separation factor of 19.3 and a contact timeof 15 minutes. Thus the technique of emulsion liquid membrane may be used as a reasonably effective method toseparate penicillin G from phenylacetic acid.
Spesiasi Senyawa Organotimah dengan Teknik Kromatografi Pasangan Ion-Fasa Terbalik Aman Sentosa Panggabean; Muhammad Bachri Amran; Buchari Buchari; Sadijah Achmad
Jurnal Matematika & Sains Vol 12, No 4 (2007)
Publisher : Institut Teknologi Bandung

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Abstract

The application of Ion Pair-Reversed Phase chromatography (IP-RP) technique for speciation of dibutyltin (DBT),tributyltin (TBT) and triphenyltin (TPhT) species has been studied. All of the species were able to separate on an ionpair-reversed phase chromatographic column. The eluats were detected online by the use of Hydride Generation-QuartzFurnace Atomic Absorption Spectrophotometry (HG-QFAAS) method. The eluent consisted of a mixture of methanol :water : acetic acid with a composition of 80:19:1, containing 1 mM of decane sulfonate as ion pairing reagent. The pHof the eluent was adjusted with 1 M H2SO4. The separation of all the species at the above conditions was good, whichwas shown by the values of the fundamental chromatographic parameters. The capacity factor (k) for DBT, TBT andTPhT species were 0.27, 2.54 and 5.92 respectively. The resolution (Rs) values for DBT-TBT and TBT-TPhT separationwere 2.92 and 2.42 respectively, while the selectivity for DBT-TBT and TBT-TPhT were 9.76 and 3.50, respectively.These data show the effectiveness of the developed chromatographic system.
Pengaruh Komposisi Asam Bis(2-Etilheksil)Fosfat (D2EHPA) dan Tributil Fosfat (TBP) dalam Resin Amberlite Xad-16 terhadap Sorpsion-Ion La(III), Nd(III) dan Gd(III) Ibnu Khaldun; Buchari Buchari; Muhammad Bachri Amran; Aminudin Sulaeman
Jurnal Matematika & Sains Vol 14, No 1 (2009)
Publisher : Institut Teknologi Bandung

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Abstract

Sorption of La(III), Nd(III), and Gd(III) ions with solven-timpregnated resins using bis(2-ethylhexyl)phosphoric acid (D2EHPA) and tributhylphosphate (TBP) as extractants and Amberlite XAD-16 as a polymeric support has been studied. The impregnated resins containing various amounts of extractants have been prepared by the wet and dry methods. The effects of pH, types, of extractant, extractant content (extractants/resin ratios of 10/90, 20/80, 50/50, 60/40 wt.%) and contact time on sorption of those metalic ions have been investigated by batch method. The sorption capacity of Amberlite XAD-16 resin previously prepared by the wet method with a 60/40 extractant/resin mass ratio for TBP, D2EHPA/TBP, and D2EHPA were 104.3 mg/g, 99.1 mg/g and 86.2 mg/g resin, respectively. Meanwhile, sorption capacity of Amberlite XAD-16 resin previously prepared by dry method was found to be 645 mg/g; 419.16 mg/g, and 386.9 mg/g resin, respectively. The sorption percentage of the studied metal ions was within the range of 90- 99% for TBP, D2EHPA/TBP and D2EHPA XAD-16 resins at 20/80 extractant/resin mass ratio.
PEMBENTUKAN HIDRIDA PADA TEKNIK TANDEM KROMATOGRAFI PASANGAN ION FASA TERBALIK-HG FAAS UNTUK SPESIASI SENYAWA ORGANOTIN ., Herlinawati; ., Buchari; Amran, M.Bachri
JURNAL PENELITIAN SAINTIKA Vol 11, No 2 (2011): SEPTEMBER 2011
Publisher : JURNAL PENELITIAN SAINTIKA

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Abstract

Reaksi pembentukan hidrida pada penggunaan teknik tandem kromatografi pasangan ion - fasaterbalik-HG-FAAS (Reversed Phase - Ion Pair Chromatografphy-Hydride Generation-Flame AtomicAbsorption Spectrometry) untuk spesiasi senyawa organotin telah dilakukan. Fasa gerak dekanasulfonat/asam asetat/metanol (23:2:75) dan fasa diam silika C18 mampu memisahkan senyawatributiltin (TBT) dan dibutiltin (DBT). Hasil pernisahan senyawa DBT dan TBT pada kondisipemisahan diatas memberikan kinerja pemisahan memadai yang ditunjukkan oleh nilai besaran-besaran dasar kromatografi yang baik. Beberapa parameter yang berpengaruh pada pembentukanhidrida adalah jenis dan konsentrasi asam, laju alir NaBR. dan HCI, dan konsentrasi NaBH4 telahdilakukan untuk memperoleh kinerja pemisahan senyawa DBT dan TBT yang baik. Maka dari basilpenelitian diperoleh kondisi optimum pembentukan hidrida untuk memperoleh pemisahan senyawadibutin (DBT) dan tributiltin (TBT) yang terbaik adalah menggunakan HCl 2 M, laju alir NaBH4-HCI2,35 mL/menit, dan konsentrasi NaBH4 0,6%.
PRAKONSENTRASI DAN ANALISIS ION KADMIUM BERBASIS FLOW INJECTION ANALYSIS Hasanah, Uswatun; Rusnadi, -; Amran, Bachri
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Publisher : Fakultas Matematika dan ilmu pengetahuan Alam. Universitas Pakuan.

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Abstract

CD-imprinted polymers (Cd-IPs) have been synthesized and retensinya properties have been studied for the pre concentration and analysis of cadmium concentration at the level of µ g L-1berbasis technique of flow injection analysis (FIA). This procedure is based on the retention of ions Cd (II) on Cd-IPs are synthesized. Retention cadmium ions can elution quantitatively with a solution of nitric acid directly onto the nebulizer system for atomic absorption spectrometer. The retention capacity of the Cd-IPs acquired for 20.10 mg g-1pada pH optimum and shows a quick retention kinetics. Analytical parameters such as retention capacity, the volume of the sample, the concentration and volume of eluen have been evaluated to obtain a good analytical performance. The system being developed makes it possible to analyze 15 samples per hour, with a limit of detection of the 8 µ g L-1. For the concentration of 50 μg L-1 has obtained precision values expressed as percent relative standard deviation of 1.6 (n = 5). A method of analysis that was developed has been used for the determination of cadmium in river water samples Cidurian, West Java, Indonesia with satisfactory results. Key words:  consentration, analyzing miniscule, cadmium, FIA
Sintesis dan Karakterisasi Poly (Anthranilic Acid-Co-Formaldehyde) untuk Adsorpsi Ion Pb(II) Kartika, Siska Ela; Amran, Muhammad Bachri
ALCHEMY Vol 9, No 1 (2021): ALCHEMY: Journal of Chemistry
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v9i1.11476

Abstract

 Besides having a positive impact, rapid industrial development also gives a negative impact in the form of industrial waste causing environmental pollution. Lead is one of the heavy metal ions that become a primary indicator of pollution according to the United States Environmental Protection Agency (US EPA). The determination of lead directly in environmental samples is often difficult because of the very low concentration of metal ions and the matrix interferences. Therefore, preconcentration techniques that can simplify the matrix are required. Ionic exchange resins, functionalized chelating resins, and ion imprinted polymers are mostly used to preconcentrate the trace elements. Poly (anthranilic acid-co-formaldehyde) is polymer synthesized by mixing anthranilic acid, formaldehyde, and HCl. The poly (anthranilic acid-co-formaldehyde) was characterized by FTIR and SEM analysis. Characterization results indicate that polymerization reaction has been formed indicated by the vibration of the CH2 bridge. Poly (anthranilic acid-co-formaldehyde) has a relatively smooth surface with pores. The batch method was applied. The maximum adsorption for Pb(II) ions was 16.37 mg/g at pH 5 with a contact time of 10 minutes. Keywords: poly (anthranilic acid-co-formaldehyde), adsorption, lead Selain memberikan dampak positif, perkembangan industri yang pesat juga dapat memberikan dampak negatif berupa limbah industri penyebab pencemaran lingkungan. Timbal merupakan salah satu ion logam berat yang menjadi indikator primer pencemaran menurut United States Environmental Protection Agency (US EPA). Penentuan konsentrasi timbal secara langsung dalam sampel lingkungan seringkali sulit dilakukan karena terdapat pada konsentrasi renik dengan matriks yang rumit. Oleh karena itu, teknik prakonsentrasi yang dapat menyederhanakan matriks sangat diperlukan. Resin penukar ion, resin pengkhelat, dan ion imprinted polymers banyak digunakan untuk prakonsentrasi unsur renik. Poly (anthranilic acid-co-formaldehyde) merupakan polimer yang disintesis dengan cara mencampurkan asam anthranilat, formaldehida, dan HCl. Karakterisasi poly (anthranilic acid-co-formaldehyde) telah dilakukan menggunakan FTIR dan SEM. Hasil karakterisasi mengindikasikan bahwa reaksi polimerisasi telah terbentuk yang ditunjukkan dengan adanya vibrasi CH2 bridge. Poly (anthranilic acid-co-formaldehyde) memiliki morfologi permukaan yang relatif halus dan berpori. Metode yang digunakan untuk mempelajari kemampuan adsorpsi adalah metode batch. Kapasitas adsorpsi poly (anthranilic acid-co-formaldehyde) terhadap ion Pb(II) adalah 16,37 mg/g pada pH 5 dengan waktu kontak 10 menit. Kata kunci: poly (anthranilic acid-co-formaldehyde), adsorpsi, timbal
Data Fusion of UV-Vis and FTIR Spectra Combined with Principal Component Analysis for Distinguishing of Andrographis paniculata Extracts Based on Cultivation Ages and Solvent Extraction Antonio Kautsar; Wulan Tri Wahyuni; Utami Dyah Syafitri; Syifa Muflihah; Nursifa Mawadah; Eti Rohaeti; Zulhan Arif; Bambang Prajogo; Muhammad Bachri Amran; Abdul Rohman; Mohamad Rafi
Indonesian Journal of Chemistry Vol 21, No 3 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.60321

Abstract

Andrographis paniculata is one of the medicinal plants used for the treatment of antidiabetic. Cultivation ages and solvent extraction affected metabolites' composition and concentration that directly cause the plant's efficacies. This research aimed to distinguish A. paniculata based on cultivation ages and solvent extraction using data fusion of UV-Vis and FTIR spectra combined with principal component analysis (PCA). A. paniculata with 2, 3, and 4 months post-planting were extracted by water, 50% ethanol, 70% ethanol, and ethanol. In each extract, we measured UV-Vis and FTIR spectra. Then, we used the data fusion from both spectra. We used UV-Vis and FTIR absorbance from 200–400 nm and 1800–400 cm–1, respectively. Each extract gives a similar pattern of UV-Vis and FTIR spectra, only differ in their intensities. PCA score plot in two and three-dimensional showed A. paniculata extracts could be distinguished based on cultivation ages and solvent extraction with a total variance of 86 and 92%, respectively. Furthermore, this study confirms the data fusion of UV-Vis and FTIR spectra could distinguished A. paniculata extracts combined with chemometrics based on cultivation ages and solvent extraction.
Selective Solid-Phase Extraction of Meropenem from Human Blood Plasma Using a Molecularly Imprinted Polymer Lasmaryna Sirumapea; Mohammad Ali Zulfikar; Muhammad Bachri Amran; Anita Alni
Indonesian Journal of Chemistry Vol 21, No 5 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.64025

Abstract

This study employed a selective and high adsorption performance for meropenem. Molecularly imprinted polymer for meropenem (MeIP) as the selective sorbent was prepared through a bulk polymerization reaction. Methacrylic acid, ethylene glycol dimethacrylate, benzoyl peroxide, and dimethyl sulfoxide were applied as functional monomer, crosslinker agent, initiator, and solvent, respectively. Scanning electron microscopy, thermogravimetric analysis, Brunauer-Emmett-Teller analysis, and Fourier transform infrared spectroscopy were used to characterize the morphology, pore size, and structure of imprinted polymers. The maximum adsorption capacity was achieved at pH = 3, after 4 h contacted, under 150 rpm, and 25 mg of polymer applied. The maximum adsorption capacity of MeIP for meropenem was 51.963 mg/L; the synthesized polymer had superior selectivity to meropenem compared to that of the other antibiotics (imprinting factor, IF = 2.58). Furthermore, the thermodynamic and kinetic analyses indicated that the results were in accord with the Freundlich model and the pseudo-second-order kinetic model, respectively. MeIP was selective in batch adsorption, and molecularly imprinted solid-phase extraction protocols were selective to meropenem. It was then applied to analyze meropenem in human blood plasma and resulted in 78.52 ± 2.71 of recovery.
Sintesis dan Karakterisasi SiO2@APTES-IIP Sebagai Material Fungsional Penjerap Ion Kadmium(II) Indah Puspita Sari; Muhammad Bachri Amran
Indonesian Journal of Chemical Analysis (IJCA) Vol. 4 No. 1 (2021): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol4.iss1.art3

Abstract

Sintesis SiO2@APTES-IIP dan SiO2@APTES-NIP melalui proses sol-gel melibatkan 3-amounium propyl triethoxy silane (APTES) sebagai monomer fungsional, tetraethylorthosilicate (TEOS) sebagai crosslinker, Cd (II) sebagai cetakan dan SiO2 sebagai inti. Karakterisasi SiO2@APTES-IIP dan SiO2@APTES-NIP dilakukan dengan menggunakan FTIR. Hasil karakterisasi dengan FTIR menunjukkan beberapa puncak penting pada bilangan gelombang 2939 cm-1 dan 1411 cm-1 yang berasal dari vibrasi gugus C-H serta pada bilangan gelombang 1564 cm-1 yang berasal dari vibrasi gugus N-H hal tersebut membuktikan bahwa silika gel telah berhasil terfungsionalisasi oleh monomer APTES. Morfologi dan komponen penyusun material SiO2@APTES-IIP dianalisis menggunakan SEM dan EDS. Berdasarkan metode batch SiO2@APTES-IIP memiliki kapasitas retensi sebesar 7,34 mg/g pada kondisi optimum pH 7 dan waktu kontak 90 menit. Hasil analisis menunjukkan bahwa, model isoterm adsorpsi mengikuti model isoterm adsorpsi Langmuir.
Pendekatan Metode Mikroenkapsulasi Enzim β-amilase pada Alginat untuk Reaksi Hidrolisis Pati Menjadi Maltosa Gina Maulia; Muhammad Bachri Amran
Journal Warta AKAB Vol 46, No 1 (2022): Warta AKAB
Publisher : Politeknik AKA Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55075/wa.v46i1.82

Abstract

β-amilase merupakan enzim karbohidrolase yang menghidrolisis ikatan α-1,4-glikosidik pada pati secara spesifik menghasilkan maltosa. Penggunaan enzim β-amilase untuk menghasilkan maltosa selama ini terkendala oleh sulitnya pemisahan antara enzim dengan substrat sehingga hanya dapat digunakan untuk satu kali reaksi. Pada penelitian ini dilakukan pendekatan metode amobilisasi dengan cara mikroenkapsulasi β-amilase menggunakan Na-alginat dan glutaraldehid. Pembuatan kapsul alginat dilakukan dengan meneteskan campuran enzim, glutaraldehid dan alginat yang telah dilarutkan dalam buffer asetat 0,05 M pH 5,5 ke dalam larutan Ca2+ menggunakan syringe berdiameter 0,6 mm. Kadar alginat divariasikan dengan mengukur kinerja enzim pada penggunaan alginat 2% dan 3% dengan kadar kalsium yang dibuat tetap. Kadar kalsium divariasikan 2%, 3% dan 4% pada kadar alginat yang memberikan kinerja optimum. Aktivitas enzim β-amilase terenkapsulasi alginat dievauasi dengan mengukur jumlah maltosa yang dihasilkan. Jumlah maltosa ditentukan dengan metode spektrofotometri UV-Vis pada panjang gelombang 540 nm dengan pereaksi asam 3,5-dinitrosalisilat (DNS) sebagai pembentuk warna. Enzim β-amilase terenkapsulasi alginat memiliki aktivitas tertinggi sebesar 2,34 mg maltosa/50 butir kapsul/10 menit dengan kadar alginat 2% dan kalsium 3%.
Co-Authors Abdul Rohman Aman Sentosa Panggabean Aminudin Sulaeman Anak Agung Istri Sri Wiadnyani Anita Alni Antonio Kautsar Bambang Prajogo Eko Wardoyo Buchari . Buchari Buchari Eti Rohaeti Gina Maulia Herlinawati . Ibnu Khaldun Imam Santoso Indah Puspita Sari Kartika, Siska Ela Lasmaryna Sirumapea Mohamad Rafi Mohammad Ali Zulfikar Nursifa Mawadah Rusnadi, - Sadijah Achmad Syifa Muflihah Utami Dyah Syafitri Wulan Tri Wahyuni