functional vs. non-functional
Brass and copper utensils have been around for a long time and with that there has been many opinions to whether the use of these metals in functional food use are safe to use or not. Through research on Google I have found that some cultures such as Ayurveda says that these metals can be beneficial to our bodies and other scientific research says otherwise. What I have found out that most agree on is to avoid using copper and brass utensils and cookware with foods containing vinegar, tomatoes or citrus fruits. Brass easily reacts with salt and acidic foods, when it is heated so probably best to avoid that as well.
Most importantly if your copper or brass cookware shows any signs of verdigris, a greenish or bluish deposit especially of copper carbonates formed on copper, brass or bronze surfaces and is poisonous, it is not food safe until it is cleaned. Once all the verdigris is scrubbed off, your cookware is food safe again.
So, with that information I will let you decide whether your utensil is food safe or not for you!