摘要
蔗糖酯分子在碱性条件下，加热水解为蔗糖和硬酯酸，在ｐＨ＞１０的ＮＨ＿３·Ｎ＿２Ｏ－（ＮＨ＿３）＿３Ｃ＿６Ｈ＿５Ｏ＿７体系中，于示波极谱仪上，峰电位─０．９１Ｖ处出现一灵敏度高和稳定性好的极谱图，其浓度从０．０２～０．２８ｍｇ／ｍＬ与峰电流呈线性关系，最低检出限为０．００４ｍｇ／ｍＬ，相对标准偏差为１．３％。
Sucrose esters can be determined by oscilloscopic polarography after their hydrolysis into aliphatic carboxylic acid and sucrose under alkaline conditions.In a system of NH_4OH-(NH_4)_3C6H_5O_7 at pH 10,stearic acid gives a reproducible polarogram with a peak at─0. 910 V. The curve of its concentration vs. Peak current is linear over the range of 0. 02～0.28 ng/mL.
出处
《分析测试学报》
CAS
CSCD
1994年第6期64-66,共3页
Journal of Instrumental Analysis
