The Optimization of 2, 4-dinitrophenylhydrazine Method for the Determination of Total Ascorbic Acid Content in Cucumber 
ZHANG Zixin, DONG Shaoyun, GUAN Jiantao, ZHANG Shengping, MIAO Han
China Vegetables . 2026, (11): 161 -170 .  DOI: 10.19928/j.cnki.1000-6346.2026.4044