pH-metric determination of acid values in vegetable oils without titration

被引：49
|
作者：
Turyan, YI [1 ]
Berezin, OY [1 ]
Kuselman, I [1 ]
Shenhar, A [1 ]
机构：
[1] HEBREW UNIV JERUSALEM,NATL PHYS LAB,IL-91904 JERUSALEM,ISRAEL
来源：
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY | 1996年 / 73卷 / 03期
关键词：
acid value; conditional pH; isopropanol; pH-metry; titration; triethanolamine; vegetable oils;
D O I：
10.1007/BF02523422
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A new method for determining acid values in vegetable oils has been developed for a nontitration pH-metric technique with a reagent consisting of 0.20 M triethanolamine in a 1:1 solution of water and isopropanol. The emulsive properties of this reagent provide rapid (within a minute) and quantitative extraction of free fatty acids from an oil into the solvent phase. Acid values were determined by measuring conditional pH of the emulsified reagent in a pH-meter with an aqueous reference electrode. Three different applications of this technique are discussed.
引用
收藏
页码：295 / 301
页数：7
相关论文
共 50 条
  • [1] pH-metric determination of the acid value of vegetable oils without titration
    Kuselman, I
    Tur'yan, YI
    Berezin, OY
    Kogan, L
    Shenhar, A
    JOURNAL OF AOAC INTERNATIONAL, 1998, 81 (04) : 873 - 879
  • [2] pH-metric determination of the acid value of vegetable oils without titration
    J AOAC Int, 4 (873):
  • [3] pH-metric determination of acid values in oilseeds without titration
    Kuselman, I
    Tur'yan, YI
    Burenko, T
    Goldfeld, I
    Anisimov, B
    TALANTA, 1999, 49 (03) : 629 - 637
  • [4] Acids extraction from vegetable oils for acid value pH-metric determination without titration
    Kardash-Strochkova, E
    Tur'yan, YI
    Shenhar, A
    Kuselman, I
    CROATICA CHEMICA ACTA, 2003, 76 (04) : 329 - 334
  • [5] pH-metric determination of acid numbers in petroleum oils without titration
    Tur'yan, YI
    Strochkova, E
    Berezin, OY
    Kuselman, I
    Shenhar, A
    TALANTA, 1998, 47 (01) : 53 - 58
  • [6] pH-metric determination of acid numbers of petroleum oils without titration
    Kuselman, I
    Tur'yan, YI
    Strochkova, E
    Goldfeld, I
    Shenhar, A
    JOURNAL OF AOAC INTERNATIONAL, 2000, 83 (02) : 282 - 289
  • [7] pH-Metric method for acid number determination in hydraulic oils without titration
    Strochkova, E
    Tur'yan, YI
    Kuselman, I
    TALANTA, 1999, 50 (05) : 1135 - 1139
  • [8] pH-metric determination of the acid value of oilseeds without titration
    不详
    JOURNAL OF AOAC INTERNATIONAL, 1999, 82 (04) : 915 - 922
  • [9] PH-METRIC METHOD FOR THE DETERMINATION OF ACID NUMBERS OF OILS
    LAPSHINA, TM
    TURYAN, YI
    DANILCHUK, SI
    JOURNAL OF ANALYTICAL CHEMISTRY OF THE USSR, 1991, 46 (06): : 833 - 840
  • [10] UNCONVENTIONAL METHOD OF DETERMINATION OF AMINOACETIC ACID BY PH-METRIC TITRATION
    MICHALOWSKI, T
    ROKOSZ, A
    ZACHARA, M
    CHEMIA ANALITYCZNA, 1994, 39 (02): : 217 - 222
12345