cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota semarang,
Jawa tengah
INDONESIA
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 116 Documents
 8   9   10   11   12 
Variasi Heat Treatment dalam Meningkatkan Sifat Mekanik Pahat Bubut HSS di Laboratorium Teknik Pemesinan Yopi Yogasmana; Mutaufiq Mutaufiq; Rensinna Ilmiwar Chair
Jurnal Pengelolaan Laboratorium Pendidikan Vol. 8 No. 2, Juli 2026 (Issue In Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.8.2.94-99

Abstract

The workpiece is shaped into a gear/shaft/hammer by cutting it with a lathe chisel while the lathe rotates at high speed. ST37 steel, a low-carbon steel, can be cut by a high-carbon steel lathe chisel. However, in reality, some lathe chisels are unable to cut ST37 steel, which is indicated by wear and even fracture at the cutting angle of the lathe chisel. The purpose of this research is to improve the mechanical properties of HSS lathe tools to make them harder and more durable. The method used in this research is an experiment by giving heat treatment at three different temperature variations: 780°C, 800°C, and 850°C. After the heat treatment, the hardness and toughness were tested.The results of the hardness test on the HSS lathe tool before heat treatment were 56.4 HRC and after heat treatment were 39.3 HRC; 39.0 HRC and 61.7 HRC. The results of the impact test on the HSS lathe tool before heat treatment were 2.8 Joules/mm2 and after heat treatment were 5.1 Joules/mm2; 4.7 Joules/mm2 and 3.7 Joules/mm2. Heat treatment variations at a temperature of 850°C with a holding time of 25 minutes and quenching with oil media resulted in an increase in hardness value of 5.3 HRC and an increase in toughness value of 0.9 Joules/mm2.
Pemanfaatan Limbah Praktikum Laboratorium Mikrobiologi Menjadi Pupuk Cair dan Ecoenzim Renardi Erwinsyah Putra; Mutaufiq Mutaufiq; Ratih Nirmala Dewi
Jurnal Pengelolaan Laboratorium Pendidikan Vol. 8 No. 2, Juli 2026 (Issue In Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.8.2.100-112

Abstract

Microbiology laboratory waste such as residual growth media (Nutrient Agar, Nutrient Broth, Azotobacter and Rhizobium growth media) has the potential to be processed into products of economic value. This study aims to analyze the utilization of microbiology practice waste into Liquid Organic Fertilizer (POC) and ecoenzymes. The research method includes collecting, grouping, and product manufacturing trials using 9.4 kg of solid waste and 11.56 liters of liquid waste. Liquid waste is processed into POC, POC Rhizobium, Azotobacter using a mixture of molasses and EM4 (1:1), with an incubation period of 7–30 days. Solid waste is processed into ecoenzymes with a molasses:substrate:water ratio (1:3:10) for 90 days, as well as fermentation of maggot feed. The results of the study demonstrated the effectiveness of laboratory waste utilization, yielding 36.17 liters of general fertilizer (POC), 1.2 liters of Rhizobium fertilizer (POC), 2.3 liters of Azotobacter fertilizer (POC), 12 liters of ecoenzyme, and 1 kg of maggot feed. This research demonstrates that proper laboratory waste management can produce products applicable to agriculture. 
Implementasi dan Pengembangan Quick Response Code pada Sistem Digitalisasi Laboratorium di Laboratorium Jurusan Teknik Elektromedik Politeknik Kesehatan Jakarta II Gita Rindang Lestari; Mamurotun Mamurotun; Nur Hasanah Ahniar
Jurnal Pengelolaan Laboratorium Pendidikan Vol. 8 No. 2, Juli 2026 (Issue In Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.8.2.113-121

Abstract

The laboratory is one of the vital facilities in vocational education. Based on observations in the Laboratory of the Department of Electromedical Engineering at Poltekkes Kemenkes Jakarta II, the equipment operation instructions/SOP documents are still using HVS paper, which is manually attached to walls or hung on the equipment itself. This method causes the instruction documents to deteriorate quickly and be easily lost, thereby disrupting laboratory operations. With the rapid advancement of technology, this issue can be addressed through the digitalization of laboratory documents. The goal of this digitalization is to enhance document storage security, simplify access, and make the instruction documents more efficient in terms of size. One practical solution proposed is the implementation of a Quick Response Code (QR Code) system. QR Codes not only improve document storage security and information access speed but also maintain functionality even when the code is physically damaged by up to 30%. This research was conducted in the Laboratory of the Department of Electromedical Engineering over seven months, from June 2024 to December 2024. The research methodology involved seven stages: collecting instruction documents, system design, system development, QR Code testing using a QR scanner, data collection, data processing, and result analysis. In testing the functionality of the QR Code, a blackbox testing method was used to ensure that the generated QR Codes accurately displayed the equipment operation instructions. The identification results showed that 174 pieces of equipment in the Electromedical Engineering Laboratory have been equipped with QR Codes. The research findings indicate that the implementation of QR Codes successfully enhanced the security of instruction document storage and facilitated easier access for laboratory users. Thus, the digitalization of instruction documents through QR Codes is expected to improve the efficiency of laboratory management, reduce the risk of document damage and loss, and support a more modern and integrated laboratory operation.
Implementasi CodeIgniter 4 untuk Pengelolaan Inventaris, Peminjaman dan Monitoring Mesin Berbasis Web di Laboratorium Pemesinan Politeknik Industri Logam Morowali Abduh Malik Alfafa; Angga Tegar Setiawan; Kadex Widhy Wirakusuma
Jurnal Pengelolaan Laboratorium Pendidikan Vol. 8 No. 2, Juli 2026 (Issue In Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.8.2.122-135

Abstract

Machining laboratories play a crucial role in vocational education, particularly in supporting manufacturing practicums and research. However, manual inventory management and tool borrowing often lead to inefficiencies in record-keeping, maintenance delays, and inaccuracies in tracking tools and materials. This study aims to develop a web-based laboratory management system using the CodeIgniter 4 framework to enhance inventory management efficiency, streamline tool borrowing processes, and prepare for future IoT-based machine monitoring integration. The research employs an experimental development design approach. The system includes features for inventory management, tool and material borrowing, and a machine monitoring page designed for IoT integration. Built with PHP, MySQL, HTML, CSS, and JavaScript using the MVC architecture, the system has proven to improve inventory record-keeping efficiency, reduce borrowing errors, and facilitate real-time information access. Although successfully implemented, IoT integration for machine monitoring requires further development to provide real-time operational data. Additionally, enhancing system security through data encryption and two-factor authentication is necessary. This system significantly contributes to the digitalization of laboratory management, paving the way for smarter and more automated laboratories.
Verifikasi Penentuan Kadar Sitronelal dalam Minyak Sereh Wangi Menggunakan GCFID Surani Surani; Renardi Erwinsyah
Jurnal Pengelolaan Laboratorium Pendidikan Vol. 8 No. 2, Juli 2026 (Issue In Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.8.2.85-93

Abstract

Citronella oil is one of the essential oils, where the main component is Citronellal. The Instrumental Chemistry Laboratory is a testing laboratory that accepts citronella oil testing samples from both Chemistry Study Program students at the Indonesian University of Education and external students. As a testing laboratory, the analysis must use proven methods, procedures, and equipment to ensure the suitability and purpose of the test. Currently, the Instrumental Chemistry Laboratory will propose and implement ISO/IEC 17025 so that the test results are more valid, consistent, and accountable. The purpose of this study was to verify the method for determining citronellal levels in citronella oil using GC-FID, where the samples used were samples from the isolation and synthesis of organic compounds practicum by chemistry study program students. The results of the study for the linearity of the citronellal standard obtained a correlation value of 0.9988 and has entered the linearity quality requirement of 0.9950. From the results of the accuracy test measurements, the recovery value was 91.15% and entered the quality requirement of 80-110%. From the results of the precision test measurements, the RSD value was 1.87%, which was within the quality requirements of <2%. The limit of detection and limit of quantitation were determined with LOD results of 2.72% and LOQ of 9.06%. Based on the results of the verification study, the method for analyzing citronellal levels in citronella oil using GC-FID has met the acceptance requirements, so it can be concluded that this method has been verified
Pengendapan Logam Tembaga (Cu) dengan Sistem Kimiawi pada Limbah Luaran Kerja Bengkel Elektronika Aris Fakhrudin; Alrosyid Alrosyid; Mardi Wasono; Basuki Rachmat; Dewi Pujiastuti
Jurnal Pengelolaan Laboratorium Pendidikan Vol. 8 No. 2, Juli 2026 (Issue In Progress)
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.8.2.136-146

Abstract

Electronics workshop practicums and undergraduate final projects conducted in educational laboratories generate liquid waste containing high concentrations of copper (Cu). This wastewater is acidic, corrosive, and classified as hazardous and toxic waste (B3), posing potential risks to laboratory personnel, equipment, and the environment if not properly managed. A simple and widely applied method for reducing heavy metal concentrations in wastewater is chemical precipitation using alkaline reagents; however, the effectiveness of the precipitating agent strongly depends on wastewater characteristics and operational conditions.This study aimed to optimize the precipitation of copper (Cu) from wastewater generated by printed circuit board (PCB) etching processes in an electronics workshop and to compare the performance of sodium hydroxide (NaOH) and calcium hydroxide [Ca(OH)2] as precipitating agents. Batch experiments were conducted at room temperature with variations in contact time, mixing conditions, and precipitant dosage. Dissolved copper concentrations were determined using Atomic Absorption Spectrophotometry (AAS).The results demonstrate that NaOH provides significantly higher copper removal efficiency than Ca(OH)2. From an initial copper concentration of approximately 2,381 mg/L, precipitation using NaOH without mechanical mixing reduced the Cu concentration to about 19.765 mg/L at an optimum contact time of 10 hours. In the dosage optimization experiments with mixing, the addition of 5 g NaOH achieved the lowest residual copper concentration, approximately 1.67 mg/L. In contrast, Ca(OH)2 under comparable contact time conditions resulted in substantially higher residual copper concentrations, indicating lower effectiveness for the tested wastewater matrix.Based on these findings, it can be concluded that the research objective was achieved, namely identifying the optimum conditions for copper precipitation from electronics workshop wastewater. Sodium hydroxide (NaOH) was proven to be more effective than calcium hydroxide [Ca(OH)2] and has strong potential as a simple, low-cost method for managing hazardous liquid waste in educational laboratories to enhance laboratory safety and environmental compliance.

Page 12 of 12 | Total Record : 116

 8   9   10   11   12 

Filter by Year

2019 2026


Reset
Filter By Issues
All Issue Vol. 8 No. 2, Juli 2026 (Issue In Progress) Vol.8, No.1, Januari 2026 Vol. 7 No. 2, Juli 2025 Vol.7, No.1, Januari 2025 Vol.6, No.2, Juli 2024 Vol.6, No.1, Januari 2024 Vol.5, No.2, Juli 2023 Vol. 5, No. 1, Januari 2023 Vol. 4, No. 2, Juli 2022 Vol. 4, No. 1, Januari 2022 Vol. 3, No. 2, Juli 2021 Vol. 3, No. 1, Januari 2021 Vol. 2, No. 2, Juli 2020 Vol. 2, No. 1, Januari 2020 Vol. 1, No. 2, Juli 2019 Vol. 1, No. 1, Januari 2019 Vol. 1, No. 1, Januari 2019 More Issue