ABSTRAKPada penelitian ini telah dilakukan pengukuran logam Cu(II) menggunakan elektroda pasta karbon (EPK) tanpa dan termodifikasi zeolit dengan metode voltametri pelucutan anodik. Parameter yang diamati yaitu kondisi optimum (waktu deposisi dan laju pindai), komposisi modifier zeolit yang ditambahkan, dan uji validitas elektroda kerja. EPK termodifikasi zeolit pada kondisi pengukuran optimum digunakan untuk menentukan konsentrasi ion logam Cu dalam sampel air limbah pembuatan gong. Hasil penelitian menunjukkan waktu deposisi optimum 410 detik dan laju pindai optimum 7,5 mV/s untuk elektroda pasta karbon tanpa modifikasi. Komposisi optimum modifier zeolit adalah 20 % dari berat grafit yang digunakan, waktu deposisi dan laju pindai yang menghasilkan arus puncak tertinggi masing-masing diperoleh pada 380 detik dan 10 mV/s. Hasil uji validasi elektroda pasta karbon termodifikasi yaitu limit deteksi pengukuran larutan standar Cu(II) adalah 46,13 ppb, lebih rendah dibandingkan dengan elektroda pasta karbon tanpa modifikasi, yaitu 99,93 ppb. Hasil pengukuran menggunakan EPK termodifikasi zeolit memiliki keberulangan (presisi) dan perolehan kembali (akurasi) yang baik. Pengukuran kadar logam Cu(II) dalam air limbah pembuatan gong yang diukur menggunakan EPK termodifikasi zeolit adalah 93,54 ± 0,87 ppb.Kata Kunci : elektroda pasta karbon, logam Cu, voltametri pelucutan anodik, zeolit. ABSTRACTIn this research, the unmodified and modified carbon paste electrode with zeolite has been prepared, for determination of Cu(II) using anodic stripping voltammetry method. The parameters observed involved deposition time, scan rates, zeolite composition in carbon paste, and validation of working electrode. The optimum performance of carbon paste electrode modified with zeolite was applied for determination of Cu(II) in wastewater of the gong fabrication. The results of this research showed the optimum of deposition time and scan rates obtained at 410 s and 7.5 mV/s for unmodified carbon paste electrode, respectively. The optimum composition of zeolite-modifier is 20 % from total graphite, with deposition time 380 s and scan rates 10 mV/s. The detection limit of the measurement
<p>In this research, the unmodified and modified carbon paste electrode with zeolite has been prepared, for determination of Cu(II) using anodic stripping voltammetry method. The parameters observed involved deposition time, scan rates, zeolite composition in carbon paste, and validation of working electrode. The optimum performance of carbon paste electrode modified with zeolite was applied for determination of Cu(II) in wastewater of the gong fabrication. The results of this research showed the optimum of deposition time and scan rates obtained at 410 s and 7.5 mV/s for unmodified carbon paste electrode, respectively. The optimum composition of zeolite-modifier is 20% from total graphite, with deposition time 380 s and scan rates 10 mV/s. The detection limit of the measurement of Cu(II) standard solution using unmodified carbon paste electrode is 46.13 ppb, is lower than unmodified carbon paste electrode, 99.93 ppb. Zeolite-modified carbon paste electrode has good precision and accuration. The concentration of Cu(II) in waste water of gong fabrication , using carbon paste electrode modified with zeolite is 93.54 ± 0.87 ppb.</p>
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