BIDANG ILMU: MIPA (Kimia Lingkungan)
LAPORAN HASIL PENELITIAN DISERTASI DOKTOR TAHUN ANGGARAN 2010
Judul
: Penentuan Spesies Cr(III) dan Cr(VI) Dalam Air Secara
Peneliti
Inductively Coupled Plasma - Atomic Emission Spectrometry(ICP-AES) Dengan Mini Kolom Ganda : Adam Wiryawan
Dibiayai Oleh Direktorat Jenderal Pendidikan Tinggi, Kementerian Pendidikan Nasional sesuai dengan Surat Perjanjian Penugasan Dalam Rangka Pelaksanaan Penugasan Penelitian Disertasi Doktor Tahun Anggaran 2010 Nomor : 492/SP2H/PP/DP2M/VI/2010, tanggal 11 Juni 2010.
Universitas Brawijaya Malang 2010
RINGKASAN Penentuan spesies Cr(III) dan Cr(VI) dilakukan menggunakan mini kolom ganda dalam sistim pretreatment otomatis yang digabung dengan ICP-AES sebagai ditektor. Resin Analig Cr-02 dimasukkan dalam kolom pertama dan resin Muromac A-1 pada kolom kedua. Sistim yang dikembangkan ini memberikan hasil analisis yang sangat sensitif dan otomatis untuk spesiasi Cr(III) dan Cr(VI). Hasil percobaan menunjukkan bahwa spesies Cr(VI) dapat diikat oleh resin Analig Cr-02 pada pH 3 – 5, sedangkan spesies Cr(III) dapat diikat oleh resin Muromac A-1 pada pH 4 – 9. Sistim yang dikembangkan berhasil dengan baik digunakan untuk spesiasi Cr(III) dan Cr(VI) dalam sample air minum, air kran dan air sungai. Limit diteksi kromium untuk metode ini adalah 0,6 μg L 1 dan waktu yang diperlukan untuk analisis satu sample adalah 8 menit.
SUMMARY Speciation of Cr(III) and Cr(VI) were conducted by using dual mini columns in the automated pretreatment system and coupled with ICP-AES as detector. The Analig Cr02 resin was packed in the first column and the Muromac A-1 resin was packed in the second column. The system can provide highly sensitive and fully automated system for the speciation of Cr(III) and Cr(VI). The result of experiment showed, that the Cr(VI) species can be collected by Analig Cr-02 resin at pH of 3 - 5, while Cr(III) species could not retained by Analig Cr-02 resin. The Cr(III) species was collected by Muromac A-1 at pH 4 - 9. The developed system was successfully applied for speciation of Cr(III) and Cr(VI) in mineral drinking water, tap water and river water samples. The detection limits of chromium was 0.6 μg L-1 and the analysis time of 8 minutes for both chromium species.
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