摘要
本文研究了用原子吸收法间接测定饮料中总酸度的方法。用ＭｇＮＨ４ＰＯ４悬浮液同有机酸作用，离心沉降未反应的试剂，用ＡＡＳ测定上清液中的Ｍｇ，可间接测定有机酸的总量，用本法测定了饮料样品中的总酸度。测定结果相对偏差小于５．３％，回收率在９１～１０４％之间。本法测定结果与酸碱滴定法的结果符合。
A new indirect AAS method for the determination of the total amount of acid in soda water is investigated.After adding MgNH_4PO_4 reagent to sample solution to react with organic acid,the unreacted reagent subsides by using centrifuge and Mg is detected in solution by AAS.The content of acid is calculated in samples.The results agreed weel with those obtained by volumetric analysis.The relative standard deviations are less than 5.3% and the recoveries are between 91 and 104%.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1998年第4期450-452,共3页
Spectroscopy and Spectral Analysis
关键词
原子吸收法
总酸度
测定
有机酸
饮料
AAS
Atomic absorption spectrometry, Total amount of acid, Organic acid, Soda water
