کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1177974 | 1491430 | 2015 | 7 صفحه PDF | دانلود رایگان |
• The nano-Au flakes are electro-deposited on GC surface of ECC.
• The nano-Au/GC/ECC maintains its activity without Au oxidation.
• The nano-Au/GC/ECC and non-oxidative PAD give high reproducible for sugar analysis.
• This approach was applied successfully for determination of lactose in milk.
An electro-deposition approach was established to incorporate the gold nano-flakes onto the glassy carbon electrode in electrochemical cells (nano-Au/GC/ECCs). Using pulsed amperometric detection (PAD) without any gold oxidation for cleaning (non-oxidative PAD), the nano-Au/GC/ECCs were able to maintain their activity for oxidizing of carbohydrates in a normal alkaline medium. The reproducibility of peak area was about 2 relative standard deviation (RSD,%) for 6 consecutive injections. A dynamic range of carbohydrates was obtained over a concentration range of 5–80 mg L−1 and the limits of detection (LOD) were of 2 mg L−1 for fructose and lactose and 1 mg L−1 for glucose and galactose. Moreover, the nano-Au/GC/ECC using the non-oxidative PAD was able to combine with the internal standard method for determination of lactose in fresh cow milk sample.
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Journal: Analytical Chemistry Research - Volume 5, September 2015, Pages 14–20