Smart Food Check: How Scientists Track Tyramine

In the world of food safety, scientists are always looking for better ways to detect harmful substances. One such substance is tyramine, a compound that can cause health issues if consumed in large amounts. Recently, researchers developed a clever tool to spot tyramine in food, especially cheese.

Microgels: Tiny Traps for Tyramine Detection

They created tiny, spongy balls called microgels. These microgels are like tiny traps that hold an enzyme called tyrosinase. This enzyme is great at detecting tyramine. The scientists made these microgels using a special ingredient called polyethylene glycol (PEG). This PEG helps the enzyme work better, making the detection process more sensitive.

Size and Efficiency

The microgels are tiny, ranging from 2 to 18 micrometers in size, with an average of 6.2 micrometers. This small size is perfect for trapping the enzyme and making it work efficiently. The scientists found that using PEG increased the detection signal by 22% compared to microgels without PEG.

Optimal Conditions for Detection

To make sure the tool works well, the scientists tested different conditions. They checked the best pH level, temperature, and other factors. They found that a pH of 6 and a cross-linking ratio of 2% worked best. This balance kept the enzyme in place while allowing it to detect tyramine effectively.

Speed and Stability

The tool is not only sensitive but also fast. It can detect tyramine in just 50 seconds and can measure a wide range of concentrations. Even after being freeze-dried, the microgels stayed stable for 9 months. The tool itself kept working well for 35 days, retaining 95-100% of its initial performance.

Selectivity and Practical Use

One big advantage of this tool is its selectivity. It can ignore other common acids and amino acids in cheese, focusing only on tyramine. This makes it very reliable. When tested on different cheese samples, like Brie and Gouda, it gave accurate results. It even helped monitor tyramine levels during cheese storage, proving its practical use.