Pengukuran Kadar Raksa Dalam Larutan Menggunakan Metode Spektrofotometri Uv-Vis Dan Voltammetri

Dewi, Listiyana Candra (2015) Pengukuran Kadar Raksa Dalam Larutan Menggunakan Metode Spektrofotometri Uv-Vis Dan Voltammetri. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pengukuran larutan raksa klorida dalam berbagai konsentrasi menggunakan metode Differential Pulse Voltammetry (DPV), Differential Pulse Stripping Voltammetry (DPSV) dan metode spektrofotometri UV-Vis telah dilakukan. Raksa yang diukur menggunakan metode spektrofotometri UV-Vis dirubah ke dalam bentuk senyawa kompleks dengan Rhodamin B. Ketiga metode divalidasi melalui penentuan nilai LOD, LOQ, sensitivitas, rentang linearitas, nilai rekoveri, serta validasi secara statistik menggunakan uji t dan uji F. Nilai sensitivitas dari metode spektrofotometri UV-Vis sebesar 0,252 L mg-1cm-1, metode DPV sebesar 6,0 μA L mg-1 dan metode DPSV sebesar 61 μA L mg-1. Berdasarkan nilai rentang linearitas, metode DPV dapat digunakan untuk mengukur raksa pada konsentrasi 2-100 ppm, metode DPSV dapat digunakan untuk mengukur raksa pada konsentrasi di bawah 5 ppm, dan metode spektrofotometri UV-Vis dapat digunakan untuk mengukur kadar raksa pada konsentrasi di bawah 2 ppm. Berdasarkan nilai rekoveri, metode DPSV dan spektrofotomemtri UV-Vis dapat digunakan untuk mengukur kadar raksa pada konsentrasi di bawah 5 ppm sedangkan pengukuran raksa pada konsentrasi di atas 20 ppm dapat dilakukan dengan metode DPSV dan DPV. Berdasarkan hasil uji t dan uji F, metode DPV dan DPSV memiliki presisi dan akurasi yang sebanding namun berbeda secara signifikan dengan metode spektrofotometri UV-Vis ================================================================================================= Analysis of mercury chloride using Differential Pulse voltammetry (DPV), Differential Pulse Stripping voltammetry (DPSV), and UV-Vis spectrophotometry methods has been done. Mercury chloride measured by UV-Vis spectrophotometry methods in the form of complex compounds with Rhodamine B. These three methods were validated by determining the value of LOD, LOQ, sensitivity, linearity range, value recovery, as well as validation statistically using the t test and F test. The sensitivity of the UV-Vis spectrophotometry method was 0.252 L mg-1cm-1, DPV method was 6 , 0 uA L mg-1 and DPSV method was 61 uA L mg-1. Based on the range of linearity, DPV method can be used to measure mercury at concentrations of 2-100 ppm, DPSV method can be used to measure mercury at concentrations below 5 ppm, and the UV-Vis spectrophotometry method can be used to measure levels of mercury at concentrations below 2 ppm. Based on the recovery value, the method spektrofotomemtri DPSV and UV-Vis can be used to measure levels of mercury at concentrations below 5 ppm, while measuring mercury at concentrations above 20 ppm can be achieved by DPSV and DPV. Based on the results of the t test and F test, DPV and DPSV method have comparable precision and accuracy, but they both are significantly different with UV-Vis spectrophotometry method.

Item Type: Thesis (Masters)
Additional Information: RTKi 541.37 Dew p
Uncontrolled Keywords: raksa, spektrofotometri, DPV, DPSV
Subjects: Q Science > QD Chemistry > QD75.2 Chemistry, Analytic
Divisions: Faculty of Mathematics and Science > Chemistry > 47101-(S2) Master Thesis
Depositing User: Yeni Anita Gonti
Date Deposited: 24 Feb 2020 07:52
Last Modified: 24 Feb 2020 07:52
URI: http://repository.its.ac.id/id/eprint/75141

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