Electronic Theses and Dissertation

Alat sensor warna telah dirancang oleh peneliti sebelumnya untuk mengukur kadar ion logam merkuri. Alat sensor warna yang digunakan adalah TCS3200 dengan mikrokontroler Arduino Uno menggunakan software Arduino Integrated Development Environment (IDE) sebagai pemroses data. Hasil pengukuran sensor warna ini akan dibandingkan dengan metode standar Spektrofotometer Ultraviolet-Visible (UV-Vis). Sampel air sungai di treatment dengan proses filtrasi dan penambahan HCl untuk pengawetan. Sampel diambil dengan 3 titik koordinat yang masing-masing nya diambil dalam dua keadaan, yaitu bagian permukaan dan bagian kedalaman 50 cm. Lokasi pengambilan sampel yaitu Sungai Krueng Woyla, Aceh Barat. Hasil karakterisasi Fourier Transform Infrared Spectroscopy (FTIR) menunjukkan adanya gugus -OH dan -C=O pada TNS-AgNPs. Hasil karakterisasi Particle Size Analyzer (PSA) menunjukkan bahwa ukuran nanopartikel perak yang dianalisa kurang dari 100 nm, yaitu sebesar 91,4 nm dan ketika ditambahkan Hg2+ 50 ppb ukuran partikel menjadi 94,0 nm. Analisis sampel air sungai menunjukkan kadar ion logam merkuri menggunakan sensor warna TCS3200 sebesar 55,33-57,83 ppb dan menggunakan spektrofotometer UV-Vis sebesar 55,89-58,48 ppb. Linearitas kurva standar ion logam merkuri konsentrasi 20-80 ppb menunjukkan kurva yang linear, menggunakan sensor warna TCS3200 (r = 0,9943) dan menggunakan spektrofotometer UV-Vis (r = 0,9991). Akurasi (%recovery) menggunakan sensor warna TCS3200 berkisar antara 96,95-105,00% dan menggunakan spektrofotometer UV-Vis berkisar antara 96,10-103,60%. Simpangan baku (%RSD) intraday dan interday tidak lebih dari 2%. Perhitungan uji-t menunjukkan nilai thitung

A color sensor device has been designed by previous researchers to measure the concentration of mercury metal ions. The color sensor device used is TCS3200, integrated with an Arduino Uno microcontroller, utilizing the Arduino Integrated Development Environment (IDE) software for data processing. The measurement results from this color sensor will be compared against the standard Ultraviolet-Visible (UV-Vis) Spectrophotometer method. River water samples underwent treatment involving filtration and the addition of HCl for preservation. Samples were collected at 3 coordinate points, each taken in two conditions: the water's surface and at a depth of 50 cm. The sampling location was Krueng Woyla River in West Aceh. Fourier Transform Infrared Spectroscopy (FTIR) characterization results revealed the presence of -OH and -C=O groups in TNS-AgNPs. Particle Size Analyzer (PSA) characterization indicated that the analyzed silver nanoparticle size was less than 100 nm, specifically 91.4 nm, and when Hg2+ at 50 ppb was introduced, the particle size increased to 94.0 nm. Analysis of river water samples indicated the concentration of mercury metal ion using the TCS3200 color sensor ranged from 55.33 to 57.83 ppb, while the UV-Vis spectrophotometer yielded a range of 55.89 to 58.48 ppb. The linearity of the standard curve for mercury metal ion concentrations of 20-80 ppb demonstrated a linear curve with a correlation coefficient (r) of 0.9943 for the TCS3200 color sensor and 0.9991 for the UV-Vis spectrophotometer. The accuracy (% recovery) using the TCS3200 color sensor ranged from 96.95% to 105.00%, and with the UV-Vis spectrophotometer, it ranged from 96.10% to 103.60%. The intraday and interday relative standard deviations (% RSD) were both less than 2%. T-test calculations revealed a calculated t-value < tabulated t-value, allowing the conclusion that measurements taken with the TCS3200 color sensor do not significantly differ from the standard UV-Vis spectrophotometer method. Keywords: TCS3200 Color Sensors, Arduino Uno, Mercury Ions, TNS-AgNPs, IDE Software.