Electronic Theses and Dissertation

ABSTRAK
Sistem instrumentasi sensor warna TCS3200 dengan mikrokomputer Arduino Uno telah dikembangkan untuk aplikasi pendeteksian kadar merkuri menggunakan pereaksi Polivinil Pirolidon (PVP) dengan Nanopartikel Perak (NPP). Warna yang terbentuk kemudian dideteksi memanfaatkan filter yang tersedia pada photodiode array (PA) yang diaktifkan melalui program Integrated Development Environment (IDE). Melalui wadah sampel yang telah dirancang, terdeteksi pantulan obyek warna yang diterima oleh PA lalu dikondisikan dan diproses oleh mikrokomputer berupa sinyal-sinyal listrik yang selanjutnya diubah menjadi nilai penyusun warna dasar Merah, Hijau, dan Biru (RGB). Sampel dipreparasi dengan penambahan NaOH, HCl dan filtrat diambil. Teknik pengambilan sampel dengan 5 titik koordinat sampel air sungai Alur Mas, Kecamatan Kluet Utara, Aceh selatan. Hasil karakterisasi Fourier Transform Infrared Spectroscopy (FTIR) menujukkan bahwa adanya gugus -OH, -C=O dan -C-N pada PVP-NPP. Hasil karakterisasi Transmission Electron Microscopy (TEM) menunjukkan bahwa nanopartikel perak berbentuk bola sedang dengan ukuran kurang dari 20 nm yang diperoleh dari aplikasi imageJ. Hasil analisis menunjukkan bahwa kadar ion logam merkuri menggunakan sensor warna TCS3200 52,0-76,8 µg/L dan menggunakan spektrofotometer UV-Vis 52,56-77,10 µg/L. Linearitas diperoleh pada rentang konsentrasi 10-70 µg/L menunjukkan kurva kalibrasi yang linear menggunakan sensor warna TCS3200 (R2=0,9894) dan Spektofotometri UV-Vis (R2=0,9982). Akurasi (% recovery) menggunakan sensor warna TCS3200 berkisar antara 97,3-100,0 % dan metode spektrofotometer UV-Vis berkisar antara 98,9-108,5%. Simpangan baku relatif (% RSD) intraday dan interday tidak lebih dari 2%. Berdasarkan perhitungan uji t menunjukkan nilai thitung

ABSTRACT The TCS3200 color sensor instrumentation system with Arduino Uno microcomputer has been developed for mercury level detection applications using Polivinyl Pyrolidon (PVP) and Silver Nanoparticle (NPP) reagents. The color formed is then detected using a filter that available on the photodiode array (PA) which is activated through the Integrated Development Environment (IDE) program. Through the sample console that has been designed, it detects the reflection of color objects received by the PA and then conditioned and processed by a microcomputer in the form of electrical signals which are then converted into the values for the basic colors of Red, Green, and Blue (RGB). The measurement results were compared with the standard method of Ultra Violet Visible (UV-Vis) spectrophotometry. Samples were prepared by added NaOH, HCl and the filtrate was taken. The water samples were from the five sites points with 5 samples each in the river. The results of Fourier Transform Infrared Spectroscopy (FTIR) characterization found that there were -OH, -C=O and -C-N groups in PVP-NPP. The Transmission Electron Microscopy (TEM) characterization results that the silver nanoparticles found in spherical shape with a size of less than 20 nm obtained from the image application. The analysis showed that the levels of mercury metal ions using the TCS3200 color sensor and UV-Vis spectrophotometry were ranged from 52.0-76.8 µg/L and 52.56-77.10 µg/L, respectively. The linearity obtained in the concentration range of 10-70 µg/L shows a linear calibration curve using the TCS3200 color sensor (R2=0.9894) and UV-Vis Spectrophotometry (R2=0.9982). The accuracy (% recovery) of the TCS3200 color sensor and the UV-Vis spectrophotometer ranged from 97.3-100.0 % and 98.9-108.5%, respectively. Intraday and interday relative standard deviation (%RSD) is not more than 2%. Based on the calculation of the t test it found that the value of tcount < ttable and it can be concluded that the measurement with the TCS3200 color sensor had relatively no difference in results compared with the Ultra Violet Visible (UV-Vis) spectrophotometry. Keywords: TCS3200 Color Sensor, Arduino Uno, Mercury, PVP-NPP, IDE Program.