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Jurnal Pengelolaan Laboratorium Pendidikan
Published by Universitas Diponegoro
ISSN : -     EISSN : 2654251X     DOI : -
Core Subject : Education,
Education
Jurnal Pengelolaan Laboratorium Pendidikan (JPLP, e-ISSN: 2654-251X) adalah jurnal yang bertujuan mewadahi semua informasi karya ilmiah hasil penelitian, telaah pustaka, makalah teknis, dan kajian buku, dari bidang Pengelolaan Laboratorium. JPLP diterbitkan oleh Persatuan Pranata Laboratorium Pendidikan Universitas Diponegoro. JPLP terbit dua nomor pertahun pada bulan Januari dan Juli.
Arjuna Subject : -
Articles 6 Documents
 1 
Search results for , issue "Vol.5, No.2, Juli 2023" : 6 Documents clear
Pengembangan Metode Daur Ulang Limbah Silika Fase Diam Kromatografi Untuk Kegiatan Praktikum Di Laboratorium Rohmat Ismail; K Kurniawanti; S Sabur; Esti Prihatini
Jurnal Pengelolaan Laboratorium Pendidikan Vol.5, No.2, Juli 2023
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.5.2.91-98

Abstract

Silika merupakan salah satu limbah laboratorium yang dapat merusak lingkungan. Daur ulang limbah silika mampu meminimalisasi jumlah limbah di laboratorium. Proses daur ulang limbah silika gel terdiri dari empat tahapan yaitu pencucian dengan metanol dan aseton secara maserasi, proses sonikasi dengan gelombang ultrasonik, pemanasan dengan tanur pada suhu 600oC selama 8 jam dan karakterisasi dengan radiasi sinar UV dan FTIR. Hasil karakterisasi dengan radiasi sinar UV pada berbagai perlakuan daur ulang limbah silika gel dapat membuktikan bahwa lama dan jumlah ulangan pencucian berpengaruh terhadap tingkat keberhasilan daur ulang limbah silika. Hal tersebut dapat diindikasikan dengan noda atau area hitam yang semakin memudar. Perlakuan proses daur ulang terbaik berdasarkan karakterisasi dengan lampu UV dilanjutkan proses karakterisasinya dengan FTIR. Berdasarkan hasil karakterisasi dengan radiasi sinar UV dan FTIR perlakuan terbaik untuk proses daur ulang limbah silika gel pada penelitian ini adalah pada perlakuan dengan proses tiga kali pencucian metanol dan aseton dalam waktu 6 jam dalam setiap tahap pencucian.  
Validasi Kurkumin Hasil Isolasi Rimpang Kunyit Dengan Kromatografi Cair Kinerja Tinggi Photodiode Array Detector Ida Nur Farida; Annisa Muliya
Jurnal Pengelolaan Laboratorium Pendidikan Vol.5, No.2, Juli 2023
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.5.2.50-57

Abstract

Curcumin is the main compound in turmeric and has problems in its stability. The analytical method used to determine curcumin levels is by using high performance liquid Chromatography (HPLC) Photodiode Array Detector (PDA). HPLC has a high separation capability and good reproducibility with a low detection limit. The purpose of this research is that the isolation curcumine determined by HPLC-PDA and has been validated can be applied as a standard in quantitative analysis in the laboratory. The validation parameters specified include accuracy, precision, linearity, detection limits and quantification limits. The results of HPLC-PDA research used acetonitrile mobile phase condition : buffer phosphate pH 3,5 (70:30 v/v), flow rate of 1 mL/min, wavelength 426 nm showed curcumin from isolation had resolution (Rs= 5.7172), linearity (r=0.9991), accuracy (0.5 and 1 ppm), presicion at a concentration of 5 ppm %RSD < 20.0%, and BD values also BK are 0.1122 and 0.3401 ppm. Validation of curcumin from isolation using HPLC-PDA has the requirements as a good validation and can be used as a reference in the laboratory.
Optimasi Kinerja Alat Fourier Transform Infrared (FTIR) Melaui Studi Perbandingan Komposisi dan Ketebalan Sampel-KBr I Dewa Putu Subamia; Ni Nyoman Widiasih; I Gusti Ayu Nyoman Sri Wahyuni; Putu Lilik Pratami Kristiyanti
Jurnal Pengelolaan Laboratorium Pendidikan Vol.5, No.2, Juli 2023
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.5.2.58-69

Abstract

Problems often occur in sample testing using the FTIR instrument, one of which is that the spectrum quality of the measurement results is not optimal. This has implications for the accuracy of the test results. This condition indicates that the performance of the tool is not optimal. The non-optimal quality of this spectrum is thought to be influenced by the composition factor and the thickness of the sample-KBr which is measured not in accordance with the legibility limits of the instrument. To overcome this problem, it is important to conduct a study to find out the optimum composition and thickness of the KBr-sample which can be measured properly by the instrument. The purpose of this study was to optimize the performance of the FTIR device through a study of the optimum composition and thickness of the KBr-sample so that a good spectrum was produced in the sample measurement using FT-IR type IRAffinity-1 Shimadzu. This research is an experimental research with infrared spectrophotometry method, using the One Shot Case Study design. The treatment is a measurement of the variation in the composition of the sample-KBr and the thickness of the sample. The spectrum resulting from the reading of the FT-IR spectrophotometer is interpreted to include wave number and transmittance percent. The results of the readings of each variation are compared with the standard spectrum to see the optimization of the measurement results so that the best spectrum is obtained. The results showed that the optimum ratio of the sample-KBr composition was 4% and the optimum thickness was 1/2 pan.
Oven Pintar Berbasis Kontrol Elektonik Modul untuk Pengeringan Bahan Praktek di Laboratorium Pengecatan Anton Hartanto; Hendra Saputra Pratama; Jody Suryanto
Jurnal Pengelolaan Laboratorium Pendidikan Vol.5, No.2, Juli 2023
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.5.2.70-74

Abstract

Extreme climate change makes the situation and environmental conditions uncertain, causing the painting practice lecture process to be less than optimal. Weather that tends to be cloudy has the potential to damage the paint from student practicum results. Referring to these problems, in this research an LPG-assisted automatic paint dryer was made as the solution offered. The purpose of this research is to make an oven to support the acceleration of drying of student paint. This research is a design type, which is carried out to support effective and efficient learning in accordance with the planned learning series. The instruments used in this study were: (1) paint drying oven machine assessment sheet; and (2) the target audience's response questionnaire. Indicators of research success are based on process and results. This smart oven based on electronic control module is very suitable to be used as a tool in improving the quality of painting results, especially in automotive painting. Making a smart oven based on electronic control of this module does not require too much money and is very easy to understand in operating the system because of the simplicity of how the oven machine system works. Questionnaire responses of students who have used smart ovens show results that agree and strongly agree with the existence of this smart oven.   
Uji Performa Alat Vakum Tekan Termodifikasi Untuk Impregnasi Kayu Esti Prihatini; Rohmat Ismail; Istie Sekartining Rahayu; Rizky Ramdhani
Jurnal Pengelolaan Laboratorium Pendidikan Vol.5, No.2, Juli 2023
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.5.2.75-82

Abstract

The impregnation process is carried out to increase the resistance of wood from the attack of microorganisms such as fungi and termite attacks by placing the wood in a vacuum tube and then placing an impregnan solution into it. The limited ability of impregnation tubes is an obstacle in carrying out research and practicum activities, therefore there needs to be modifications to the impregnation tube so that the impregnation process can provide better results. Verification of the results of impregnation is done by calculating the value of weight percent gain (WPG) and relative standard deviation (%RSD) for the test of the level of appreciation. Based on the results of the experiment the highest %WPG value in the water impregnan solution was obtained from the parameter conditions of the type 3 press vacuum tool, which is with a time of 1 hour and a pressure of 5 bars and is worth (178.29±10.97). The highest %WPG value in boron solution of 5% is obtained from the condition of the type 6 press vacuum tool with a time of 3 hours and a pressure of 5 bars and is worth (5.16±0.45). The smallest %RSD value of water impregnan solution is achieved under the parameter conditions of type 4 tools at 3 hours and pressure 1 bar and is worth 3.99%. The smallest %RSD value of boron impregnan solution is 5% achieved under the parameter conditions of type 2 tools, namely within 1 hour and pressure of 3 bars and is worth 5.36%.
Penyisihan Krom Dalam Limbah Cair Laboratorium Dengan Metode Adsorpsi dan Fitoremediasi Titik Indrawati; Nunung Isnaini Dwi Ningsih; Padya Sumarwanto
Jurnal Pengelolaan Laboratorium Pendidikan Vol.5, No.2, Juli 2023
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.5.2.83-90

Abstract

The laboratory is one of the units that produce liquid waste which in addition to having infectious properties is also toxic, which if not managed properly will have the potential to damage the ernvironment and living things. Laboratory wastewater treatment is important because the treament and procurement of WWTPs that meet the requirements are very high cost, therefore it is neceessary to do research to find a simple but effective liquid waste treatment technology to reduce the level of liquid waste parameters, easy to make, using local materials, and the price is affordable. This study aims to determine the performance of sandston/gravel media, fly ash, vetiver (Vetiveria Zizanoides L), and the third mixture in reducing chromium content in laboratory wastewater by applying adsorption and phytoremediatioon methods. The liquid waste used is artificial waste made of Potassium Dichromate with a concentration of 15 mg/L. This research was conducted on a laboratory scale, using beaker. Adsorption experiments were carried out on fly ash and gravel media with weight variations of 20 g (2% w/v), 30 g (3% w/v) and 50 g (5% w/v). Phytoremediation experiments were carried out on vetiver (Vetiveria Zizanoides L) with variations in plant weight, namely 70 g (2% w/v), 170 g (3% w/v) and 200 g (5% w/v), while fro adsorption experiments the mixture of gravel and fly ash was carried our with variatons in weight of 40 g (2% w/v), 60 g (3% w/v) and 100 g (5% w/v) with ration of 1:1, respectively. The mixture of gravel, fly ash and plants was carried out in a ratio of 1:1:1 with a weight of 100 g each. Observations were made on chromium levels on day 1 and 15. The results showed that the removal of chromium levels in each adsorption experiment using gravel was an average of 0,32 mg/L, whilae adsorption using fly ash average 1.58 mg/L; 10.135 for fly ash; 2.00% for gravel, and 24.16% for vetiver. The decrease ini chromium levels with vetiver plants was 3,78 mg/L on average. The highest removal efficiency (RE) value of 76.64% occured in the adsorption and phytoremediation experiments using vetiver plants and a mixture of fly ash and gravel media a ratio (1:1:1) with each weight of 100 g (5% w/v).

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