Citrate, Quantitative, 24-Hour Urine by Gas Chromatography Mass Spectrometry (GC-MS) is a laboratory test used to determine the level of citrate in a urine sample collected over 24 hours. Citrate is an important compound produced during acid metabolism in the body, and urinary citrate levels help assess kidney health as well as the body's acid-base balance. The urine sample is collected over 24 hours, providing precise information about citrate excretion. This test is used to diagnose conditions such as kidney stones or metabolic disorders. The GC-MS technique offers high accuracy and sensitivity, making it an ideal choice for obtaining reliable results that help physicians make informed medical decisions.