[Determination of the caffeine content in syrup vitamin B1 and glycerophosphate using the first derivative ratio method].
Dong
S S
SS
Xu
P J
PJ
An
D K
DK
D002110:Caffeine / Q000032:analysis*; D004339:Drug Compounding; D005994:Glycerophosphates / Q000032:analysis*; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013831:Thiamine / Q000032:analysis*
D005994:Glycerophosphates; D012996:Solutions; D002110:Caffeine; D013831:Thiamine