Fahrizal Hazra
Departemen Ilmu Tanah Dan Sumberdaya Lahan, Fakultas Pertanian, Institut Pertanian Bogor, Jl. Meranti Kampus IPB Dramaga, Bogor 16680

Published : 26 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search
Journal : Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian

To Biomassa Tempurung Buah nyamplung (Callophyllum spp) untuk Pembuatan Briket Arang sebagai Bahan Bakar Alternatif Fahrizal Hazra; Novita Sari
Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian Vol. 1 No. 1 (2011): Jurnal Sains Terapan, Volume 1, Nomor 1, Tahun 2011
Publisher : IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (354.301 KB) | DOI: 10.29244/jstsv.1.1.8-13

Abstract

Nyamplung shell is a biomass whose existence has not been optimally utilized. Biomass is a solid waste that can be used again as a source of fuel. Favorable characteristics of the biomass is an energy source that can be utilized in a sustainable manner because it is renewable. Biomass of Nyamplung shell can be processed become a form of solid fuel with a same specific dimension, it is resulting from compression of bulk materials, powders, and the relatively small size commonly referred to as charcoal briquettes.  The aim of this research is to test the feasibility of nyamplung shell as a raw material for making briquettes on the households by conducting analysis of quality parameters briquette specimens including physical properties (water content, calor value, and density), briquette durability (persistence press), chemical (ash content, fixed carbon and volatile matter content) and the rate of burning charcoal briquette.  The treatment in this aim is a mixture composition of raw materials (charcoal of Nyamplung shell) who were given the same amount of adhesive and compressed by compressing hydraulic briquette. The results showed that, charcoal briquettes made from the Calophyllum shell can be used as alternative energy, with a characteristic range of values from 3,39-3,83% moisture content, calor value ranges from 3.646,14-5.431,35 calories / gram, the range of density values 0,663-0,721 gram/cm3, the range of persistence press value 1,98-5,39 kg/cm2, the range of ash content value 19,89-24,51%, the range of fixed carbon value 33,09-40,86%, the range of volatile matter value 35,03-38,57%, and the range of rate of burning from 0,0574-0,0898 grams/second. The low value of moisture content can lead to higher heating value of charcoal briquettes. High/low levels of volatile could affect fast/slow rate of burning charcoal briquettes. Key words : nyamplung shell, biomass, charcoal briquette
Verifikasi Metode Penentuan Residu Pestisida Beta Siflutrin dalam Kentang (Solanum tuberosum L) secara Kromatografi Gas (Verification of Method for Determination of Residual Pesticides Beta Siflutrin in Potato (Solanum tuberosum L) with Gas Chromatography) Fahrizal Hazra; Lisa Rosdiana
Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian Vol. 3 No. 1 (2013): Jurnal Sains Terapan, Volume 3, Nomor 1, Tahun 2013
Publisher : IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jstsv.3.1.50-55

Abstract

The determination of residual pesticides beta siflutrin in potato (Solanum tuberosum L) was conducted by Gas Chromatography (GC). The separation was conducted on a DB-1 (30m×0.25mm×0.25µm) coloum, using a nitrogen gas as mobile phase at flow rate of 25 mL/min. The determination of beta siflutrin in potato with GC was based on the verification method. The detection was ECD detector. Verification parameters tested were linearity, accuracy, precision, limit of detection (LOD), and limit of quantitation (LOQ). Linearity had a correlation coefficient (r) of 0.9992. Accuracy had a recovery value of 99.49%. Precision had a value of relative standard deviation (% RSD) of 2.48%. The limit of detection (LOD) and limit of quantitation (LOQ) obtained was 0.001305 and 0.00435 mg/kg. The result of this research showed that the method of determination of residual pesticides beta siflutrin in potato with GC can be used as a routine analysis.Key words: verification, beta siflutrin, GC, potato
Verifikasi Metode Uji Arsen dalam Contoh Mainan Anak dengan Spektrofotometer Serapan Atom Generator Uap Hidrida (Method Verification of Assay Arsenic in Toy Sample with Absorption Atomic Spectrophotometer Hydrid Vapor Generator) Fahrizal Hazra; Susanti Pratiwi Purnama; Suri Mulyani Sari
Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian Vol. 4 No. 2 (2014): Jurnal Sains Terapan, Volume 4, Nomor 2, Tahun 2014
Publisher : IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2626.284 KB) | DOI: 10.29244/jstsv.4.2.36-45

Abstract

The safety of toys as one of important factors needs to be considered. It can be seen from the presence of heavy metals such as arsenic (As). The analysis of heavy metal arsenic in children's toys can use the verified SNI ISO 8124-3 : 2010 method. Verification activities are needed to verify that the laboratory is able to perform a test which is using such method, and the result are valid. Parameters used in this verification were linearity, limit of detection (LOD), limit of quantitation (LOQ), precision, and accuracy. Based on the verification result of Assay Arsenic in toys with Atomic Absorption Spectrophotometer Hydrid Vapor Generator (HVG), good liearity had a correlation coefficient (r) of 0.9993. The limit of detectin (LOD) and limit of quantitation (LOQ) obtained was 0.0113 mg/Kg and of 3.39%. The accuracy had a recovery value 97.66%. The experimental results showed that the Assay Arsenic in toys with Atomic Absorption Spectrophotometer Hydrid Vapor Generator (HVG) can be used as routine analysis.Keywords : arsenic, atomic absorption spectrophotometer, hydrid  vapor generator, verification
Pemurnian Gliserol dari Hasil Samping Produksi Biodiesel Minyak Kelapa Sawit (Purification of Glycerol from the By-Product of Palm Oil Biodiesel Production) Fahrizal Hazra; Irfan Septiawan
Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian Vol. 4 No. 1 (2014): Jurnal Sains Terapan, Volume 4, Nomor 1, Tahun 2014
Publisher : IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (362.341 KB) | DOI: 10.29244/jstsv.4.1.53-58

Abstract

The process of making biodiesel made of palm oil produced as a by-product of glycerol with low purity levels, liquids, viscous blackish brown with a very alkaline pH (pH >10). Glycerol is often referred to as crude glycerol. The process of refining glycerol that is by adding phosphoric acid concentration range. The average value of the levels of glycerol from glycerol purification results on the phosphoric acid concentration of 2.5%, 5% and 7.5% (v/v) i.e. 81.2205%, 83.4609% and 80.7595%. Determination of the levels of glycerol results showed samples of glycerol rough after the addition of phosphoric acid with different concentrations of already existing standards. The result analysis of glycerol after purification by the addition of phosphoric acid at concentrations of 5% is most suitable for the process of improving  the purity of glycerol.Keywords: crude glycerol, purification, phosphate acid, glycerol content