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Photon: Jurnal Sain dan KesehatanPhoton: Jurnal Sain dan Kesehatan

Heavy metal contamination is one of the problems in pharmaceutical products. Carbon dots are a practical and economical method of heavy metal detection to reduce heavy metal contamination in pharmaceutical products. Carbon dots have been successfully synthesized by microwave irradiation from sugar table doped with urea fertilizer (CD-GU) and citric acid doped with urea fertilizer (CD-AU). The success of the synthesis of carbon dots can be seen from their properties that produce a blue to green luminescence when excited with a 405 nm laser and an orange to red luminescence when excited with a 532 nm laser. When excited with a 405 nm laser, CD-GU produces a strong light blue luminescence, while CD-AU produces a strong green luminescence. CD-GU and CD-AU also exhibit orange luminescence when excited with a 532 nm laser. The intensity of luminescence of carbon dots will decrease when interacting with heavy metals so that it can be applied for heavy metal detection. The results of this study revealed that CD-GU and CD-AU can be used to detect heavy metals.

The synthesis of carbon dots from urea-doped granulated sugar (CD-GU) and urea-doped citric acid (CD-AU) has been successfully achieved using microwave irradiation.The successful synthesis is demonstrated by the luminescence properties of the carbon dots.The results of heavy metal detection experiments indicate that both CD-GU and CD-AU are effective in detecting chromium metal due to the significant decrease in luminescence intensity upon interaction.

Penelitian lebih lanjut dapat dilakukan untuk mengoptimalkan sintesis karbon dots dengan variasi sumber karbon dan doping untuk meningkatkan efisiensi deteksi logam berat tertentu. Selain itu, studi komparatif perlu dilakukan untuk mengevaluasi kinerja CD-GU dan CD-AU dalam mendeteksi berbagai jenis logam berat pada konsentrasi yang berbeda dalam matriks sampel yang kompleks, seperti air limbah atau sampel farmasi. Pengembangan sensor berbasis karbon dots yang terintegrasi dengan sistem portabel dan mudah digunakan juga menjadi arah penelitian yang menjanjikan, sehingga memungkinkan aplikasi di lapangan untuk pemantauan kualitas lingkungan dan keamanan produk secara real-time.

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