Which copper reduction method is Benedict's variant that uses stabilizers such as citrate or tartrate?

Which copper reduction method is Benedict's variant that uses stabilizers such as citrate or tartrate?

• A. Folin-Wu
• B. Nelson-Somogyi
• C. Neocuproine
• D. Benedict's (Folin Wu Modified)

Answer: (D)

Copper reduction methods for measuring reducing substances rely on Cu2+ being reduced to Cu+. Benedict’s test is the classic version, but a modification later added stabilizers like citrate or tartrate to the reagent. These stabilizers keep the copper in a reactive complex in the alkaline medium, reducing interference and precipitation and producing more reliable color development that correlates with sugar concentration. So, the description of a Benedict’s variant that uses stabilizers such as citrate or tartrate corresponds to Benedict’s reagent modified by Folin-Wu. Other variants are different approaches that do not emphasize these stabilizers.

Copper reduction methods for measuring reducing substances rely on Cu2+ being reduced to Cu+. Benedict’s test is the classic version, but a modification later added stabilizers like citrate or tartrate to the reagent. These stabilizers keep the copper in a reactive complex in the alkaline medium, reducing interference and precipitation and producing more reliable color development that correlates with sugar concentration. So, the description of a Benedict’s variant that uses stabilizers such as citrate or tartrate corresponds to Benedict’s reagent modified by Folin-Wu. Other variants are different approaches that do not emphasize these stabilizers.