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All Journal Jurnal Pendidikan Kimia Indonesia Jurnal Pengelolaan Laboratorium Pendidikan
I Gusti Ayu Nyoman Sri Wahyuni
Universitas Pendidikan Ganesha
Chemistry Education

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Efektivitas Video Panduan Menggunakan Bahan Kimia untuk Meningkatkan Kesehatan dan Keselamatan Kerja di Laboratorium I Dewa Putu Subamia; I Gusti Ayu Nyoman Sri Wahyuni; Ni Nyoman Widiasih
Jurnal Pendidikan Kimia Indonesia Vol. 5 No. 1 (2021)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jpk.v5i1.29535

Abstract

Masih adanya kecelakaan dalam menggunakan bahan kimia yang berpotensi mengancam kesehatan dan keselamatan praktikan, menunjukkan bahwa pengetahuan kesehatan dan keselamatan kerja di laboratorium kimia masih perlu ditingkatkan. Penelitian ini bertujuan untuk menganalisis efektivitas video panduan menggunakan bahan kimia untuk meningkatkan pengetahuan kesehatan dan keselamatan kerja. Desain penelitian adalah pre-experimental dengan model one-group pretest-posttest design. Populasi dalam penelitian ini adalah mahasiswa semester 5. Pengambilan sampel dilakukan dengan teknik simple random sampling melalui google form. Jumlah sampel 31 orang dipilih secara acak dari keseluruhan mahasiswa yang mengisi form pre tes dan post tes. Metode pengumpulan data adalah tes dan angket. Analisis data menggunakan uji paired sample t test, dan uji persentase efektivitas. Hasil penelitian menunjukkan nilai rata-rata posttest lebih besar dari nilai rata-rata pretest, mengalami peningkatan yang signifikan. Hasil uji persentase efektivitas 81,50% terkategori efektif. Berdasarkan hasil penelitian tersebut, dapat disimpulkan bahwa pemberian video panduan menggunakan bahan kimia efektif meningkatkan pengetahuan kesehatan dan keselamatan kerja menggunakan bahan kimia.
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.
Co-Authors I Dewa Putu Subamia I Dewa Putu Subamia Ni Nyoman Widiasih Putu Lilik Pratami Kristiyanti