Key Findings
According to a recent research announcement, a highly sensitive fluorescent sensor for vitamin B12 has been developed using boron- and nitrogen-co-doped carbon nanodots (B,N-CDs). This innovative sensor allows for accurate and rapid detection of vitamin B12 levels in food samples by exhibiting a unique change in blue fluorescence emission in the presence of vitamin B12, thereby opening new avenues for portable food testing.
Technical / Clinical Details
The developed B,N-CDs exhibit changes in their fluorescent properties through specific interactions with vitamin B12 molecules, owing to their unique quantum size effects and surface characteristics. Specifically, the sensor utilizes the phenomenon where the blue fluorescence intensity of B,N-CDs is quenched or enhanced in a concentration-dependent manner upon binding to vitamin B12. This sensor demonstrates a linear fluorescent response to vitamin B12 concentrations over a broad range of 0-100 μM, achieving a very low limit of detection (LOD) of 0.02 μM. This means it can sensitively detect even trace amounts of vitamin B12 present in food. Furthermore, it was confirmed that these B,N-CDs can be easily immobilized on simple substrates like paper strips and cotton swabs, maintaining excellent detection performance (e.g., a strong linear relationship with R²=0.9927 on paper strips) in these formats. Crucially, the sensor exhibits high stability, retaining its detection performance for 20 days, a vital characteristic for practical portable testing devices.
Background & Context
Vitamin B12 is an essential nutrient critical for DNA synthesis, nerve function, and red blood cell formation, and its deficiency can lead to serious health problems such as anemia and neurological disorders. Deficiency is particularly concerning for individuals following vegan or vegetarian diets, the elderly, and those with certain digestive conditions. Accurate measurement of vitamin B12 content in food is important for nutritional management, food quality control, and public health. However, existing vitamin B12 measurement methods often require expensive equipment and specialized techniques, making them unsuitable for rapid on-site testing. This carbon nanodot-based fluorescent sensor, with its advantages of simplicity, low cost, and high sensitivity, addresses this unmet need.
Strategic Significance & Outlook
This blue-emitting B,N-CDs sensor is expected to find wide-ranging applications in food industry quality control, household nutritional intake monitoring, and screening for malnutrition in developing countries. Its potential for integration into paper strips and cotton swabs enables its use as a ‘disposable’ portable testing kit that requires no special training, allowing for quick confirmation of vitamin B12 levels anytime, anywhere. In the future, further development of this technology is envisioned to create multi-biomarker sensors capable of simultaneously detecting multiple vitamins and nutrients. With its cost-effective manufacturing process and superior performance, this sensor is poised to make a significant contribution to achieving a safer and healthier diet.
Source: https://www.eurekalert.org/news-releases/1146372
Get our weekly technology intelligence — free
Receive an infographic that lets you judge at a glance whether each field’s analysis report is worth reading.
Subscribe Free — Weekly Tech Intelligence
By subscribing, you’ll receive Troy-Technical’s weekly technology intelligence newsletter.
- Your email and selected fields are used only to deliver the newsletter.
- We never share your information with third parties.
- You can unsubscribe anytime via the link in each email.
See our Privacy Policy for details.
Takes about a minute · Unsubscribe anytime
