0000000000617852
AUTHOR
Darma Santi
PEMBUATAN SISTEM VAKUM OTOMATIS GAS H2S BERBAHAN TiO2-Ni/Al2O3 TERKONEKSI ARDUINO UNO PADA LABORATORIUM KIMIA
Research has been carried out on the H2S gas sensor made of TiO2-Ni/Al2O3 which is connected to an automatic vacuum. The results showed that the optimum conditions for the variation of Ni doping metal levels were 20 mg / gram TiO2. The semiconductor material synthesis method used the sol gel method with TTiP precursor which was made at pH 7. Coating of the sol gel solution on the Al2O3 substrate used a dip coater with a decrease speed of 1 cm / minute and was carried out 7 times of immersion. The characterization of synthetic results used UVVis, XRD, FTIR and SEM-EDX. The band gap value resulting from Ni doping is 2.75 eV from 3.2 eV, XRD identification shows that TiO2 is anataseic and dete…
KARAKTERISASI ABU KAYU MERBAU (Intsia, spp.): PENGARUH TEMPERATUR DAN LAMA KALSINASI
Characterization of merbau wood ash (Intsia, spp.) due to the influence of temperature and time of calcination has been studied. The variations in calcination temperature were 500 ᴼC (as M500) and 600 ᴼC (as M600), while the variations in the duration of calcination were 1, 2, and 3 hours, noted as M1, M2, and M3, respectively. Characterization was carried out using X-ray diffraction (XRD) and spectroscopic analysis using FT-IR. XRD results identified the presence of CaCO3 species (rhombohedral structure) and K2Si4O9 species with a hexagonal structure on M500. The M600 species identified Si (cubic structure), SiO2 (cubic structure), K2Si4O9 (hexagonal structure), and CaCO3 (rhombohedral str…
STUDI KUANTITAS DAN KUALITAS MATA AIR KOBARI JAYA SEBAGAI SUMBER AIR BAKU DI KABUPATEN SUPIORI PROVINSI PAPUA
A study on the quantity and quality of the Kobari Jaya spring in Supiori Regency has been conducted. Research on the quality test of Kobari Jaya springs has never been conducted. This study uses descriptive methods and laboratory tests and uses a comparative method of test results against the quality standard value based on PERMENKES No. 492 Tahun 2010 tentang Persyaratan Air Minum. The test results show that the average meets quality standards. The instruments used to test water samples include AAS and UVVis spectrophotometer. Several parameters such as pH, COD, BOD, DO, Phosphate, Fecal Coliform and Total Coliform exceed the predetermined quality standard values. The cause of this high pa…