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The evaluation of deep frying oil quality with the spectrophotometric method for the rapid assessment of total polar compounds
العناوين الأخرى
تقييم جودة زيت القلي العميق بالطريقة الإسبكتروفوتوميترية للتقدير السريع للمركبات القطبية الكلية
المؤلف
al-Najjar, Id al-Sayyid Abd al-Aziz
المصدر
Zagazig Journal for Agricultural Researches
العدد
المجلد 46، العدد 5 (31 أكتوبر/تشرين الأول 2019)، ص ص. 1489-1502، 14ص.
الناشر
تاريخ النشر
2019-10-31
دولة النشر
مصر
عدد الصفحات
14
التخصصات الرئيسية
الموضوعات
- تحليل الانحدار
- الكيمياء التحليلية
- زيت عباد الشمس
- الأحماض الدهنية
- التحليل عبر المركبات الرئيسية
- رقائق البطاطا
- التقييم الحسي
- معامل الإنكسار
- القلي العميق
الملخص EN
This study focuses on the evaluation of official methods for determining frying oil quality with the new spectrophotometric method.
The performance of these methods was examined by usage intermittent deep fat frying of potato chips in sunflower oil for 40 hr.
at five consecutive days (8 hr.
, daily).
Chemical analysis is the most reliable way to measure decomposition compounds in frying oil.
With the prolonged frying time the amount of total polar compounds (TPCs) rises steadily.
It has been suggested that the determination of TPCs is the most reliable method for the measurement of oil deterioration during deep frying processes.
Beside, other oil quality indices during 40 hr.
of intermittent deep fat frying were analyzed by the official methods and/or by rapidly spectrophotometric orbance methods.
Principal component analysis and linear regression analysis were used in order to assess the obtained results.
The results were used to calibrate this spectrophotometric orbance method.
There was a strong correlation (r = 0.999) between quick spectrophotometric orbance values and TPCs content in the same set of oil samples.
The equation for conversion of the spectrophotometric orbance values to TPCs content is: Y = -57.0083 + 2.64X + 0.049 X2.
Consequently, spectrophotometric orbance method was developed to assess deep fat frying oil quality.
This study was conducted to examine the relationship of TPCs contents determined by spectrophotometric method with physical, chemical indices and sensory evaluation.
TPCs content was found to be correlated with refractive index (r = 0.950), viscosity (r = 0.989), colour (r = 0.993), acid value (r – 0.899), iodine number (r = 0.947), P-anisidine value (r = 0.987), TBA test (r = 0.875), oxidized fatty acids (OFAs) (r = 0.975).
Also, TPCs content was correlated with flavour (r - -0.752), greasiness (r - -0.917), crispy texture (r = -0.559) and overall acceptability (r = -0.649).
These results showed that the new spectrophotometric orbance method of frying oil is a good, rapid, simple, convenient and reliable indicator during deep fat frying of sunflower oil tested.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
al-Najjar, Id al-Sayyid Abd al-Aziz. 2019. The evaluation of deep frying oil quality with the spectrophotometric method for the rapid assessment of total polar compounds. Zagazig Journal for Agricultural Researches،Vol. 46, no. 5, pp.1489-1502.
https://search.emarefa.net/detail/BIM-1023519
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
al-Najjar, Id al-Sayyid Abd al-Aziz. The evaluation of deep frying oil quality with the spectrophotometric method for the rapid assessment of total polar compounds. Zagazig Journal for Agricultural Researches Vol. 46, no. 5 (2019), pp.1489-1502.
https://search.emarefa.net/detail/BIM-1023519
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
al-Najjar, Id al-Sayyid Abd al-Aziz. The evaluation of deep frying oil quality with the spectrophotometric method for the rapid assessment of total polar compounds. Zagazig Journal for Agricultural Researches. 2019. Vol. 46, no. 5, pp.1489-1502.
https://search.emarefa.net/detail/BIM-1023519
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
-
رقم السجل
BIM-1023519
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