Abstrak

Baca Juga : ESTIMASI SUHU DAN RAPAT ELEKTRON PLASMA DENGAN LASER INDUCED BREAKDOWN SPECTROSCOPY (LIBS) MENGGUNAKAN GARIS EMISI HIDROGEN PADA CANGKANG KERANG SUNGAI (Devi Susilayani, 2018) ,

Baca Juga : DETEKSI UNSUR GARAM DALAM TANAH TSUNAMI ACEH MENGGUNAKAN TEKNIK LASER INDUCED BREAKDOWN SPECTROSCOPY KOMERSIAL (Viky Lastari, 2015) ,

pembuatan pelet, sampel yang ditambahkan unsur logam berat pb, mn, cu, zn sebanyak 1% dan sampel cangkang yang ditambahkan cu dengan konsentrasi bervariasi 0.0625%, 0.125%, 2.5% dan 5%. didapatkan hasil bahwa emisi plasma yang dibangkitkan pada cangkang pelet lebih baik dibandingkan di cangkang utuh. dengan teknik libs ada beberapa logam berat yang bisa terdeteksi pada sampel cangkang pelet. sampel pelet dengan tekanan 30 mpa lebih efektif plasma yang dibangkitkan dibandingkan dengan sampel pelet pada tekan 10 mpa. sehingga secara umum dapat disimpulkan bahwa, teknik libs dapat digunakan untuk mendeteksi unsur logam berat pada sampel cangkang kerang yang dipelet pada tekanan 30 mpa. kata kunci : laser-induced breakdown spectroscopy (libs), kerang, logam berat abstract by utilising the laser-induced breakdown spectroscopy (libs), a research had been conducted to find-out whether the river shells collected from sub-district of panga in aceh jaya contain some concentration of heavy metal. the aim of this study is to determine the ability of the libs technique for detecting heavy metal elements such as pb, cu, al, zn, mn, hg, fe, cd, and as inside the river shells. plasma was produced by focusing the nd-yag laser beam with a wavelength of 1,064 nm on samples’ surface using a lens with a focal length of 155 mm (f = 155) and energy of 60 mj. plasma was generated in an environment with air pressure of 0.0066 atm (5 torr). the emissions of the plasma were detected by utilising multiple channel optical detector systems (oma) with the setting of 100 ns delay, and 50 µs detection time. the river shell samples tested in this work included the whole untreated shell samples and pellet shell samples (at 30 mpa). the pellet samples were varied by pellet pressure, 1% variation of heavy metal concentration of pb, mn, cu, zn, samples with varied cu consentration 0.0625%, 0.125%, 2.5% and 5%. the results showed that plasma emissions generated in pellet shells were better than those in the whole shells. therefore, as the conclusion, the libs technique is capable of detecting heavy metal elements in pellet shells. samples of pellet shells with a pressure of 30 mpa were better in the intensity of the emissions produced compared to a 10 mpa pressure pellet. it can be concluded in general that the libs technique can be used to detect the heavy metal elements in river shell samples in the form of pellets at the pressure of 30 mpa. keywords : laser-induced breakdown spectroscopy (libs), shells, heavy

Tulisan yang relevan

DETEKSI LOGAM BERAT (CR, ZN DAN PB) DALAM TANAH TERDAMPAK TSUNAMI DI ACEH SETELAH 10 TAHUN TSUNAMI MENGGUNAKAN TEKNIK LIBS (arlin maya sari, 2015) ,

TEKNIK LIBS UNTUK MENGUJI KEKERASAN TABLET DENGAN MEMBANDINGKAN RASIO MG (II) 279,5 NM DAN MG (I) 285,2 NM (SURIANI, 2015) ,

ESTIMASI SUHU DAN DENSITAS ELEKTRON PLASMA DAGING KERAN POKEA MENGGUNAKAN GARIS-GARIS EMISI HIDROGEN (H) DALAM LASER INDUCED BREAKDOWN SPECTROSCOPY (Yenni Asrida, 2018) ,