A R Angkat Primary Author K B Seminar Primary Author M Rahmat Primary Author A Sutandi Primary Author mixed material bibliography 2017 en English

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Abstract. Laser-Induced Breakdown Spectroscopy (LIBS) is a method for measuring level of nitrogen (N) in the soil in the form of N-nitrate (NO3) rapidly without going through the process of sieving and drying. The sample soil in the form of pellets subjected to laser pulses using a wavelength of 532 nm, pulse duration 5.5 ns, repetition rate of 10 Hz, and Q-switch delay of 150 μs. Emissions are captured by the spectrometer with the wavelength range of 190-1130 nm. Spectrum characterization was processed through the second derivative in order to obtain a wavelength identity that could be rapidly used to estimate the nitrate content of the soil with a determination coefficient of (R2 ) 0.9254 and a coefficient of variation (CV) of 8.41%. The results of this study are very potential to be applied for rapid measurement of soil nitrate NONE UPT. Perpustakaan UNIMUDA Sorong Universitas Pendidikan Muhammadiyah (UNIMUDA) Sorong P01953S My Library 2548 2021-08-12 07:11:43 2021-08-12 07:11:43 machine generated