L-抗坏血酸是右旋(Dextro-rotatory)物质,它的旋光性系数随所用溶液而不同,譬如2%的水溶液[a]~(20)=+22°至+23°,在甲醇中的[a]~(18)=+49°,通常写在抗坏血酸前面的字母 L-(过去用小写字母 l-)并不表示它左旋(Levo-rotatory),而是说明它在组态(Con-figuration)上和 L-甘油醛有关,或者说它‘属于 l-葡 L-ascorbic acid is a Dextro-rotatory substance and its optical activity varies with the solution used, such as 2% aqueous solution [a] ~ (20) = + 22 ° to + 23 ° in methanol [ a] ~ (18) = + 49 °, the letter L- (usually used in the lowercase letter l-), which is usually written in front of ascorbic acid, does not indicate Levo-rotatory, ) And L-glyceraldehyde, or that it is’ l-Portuguese