השוואת שיטות

	Kjeldahl Method	בדיקות מדף מואצות	HPLC
תחום	מדעי המזון	מדעי המזון	מדעי המזון
משפחה	Process / pipeline	Process / pipeline	Process / pipeline
שנת המקור	1883	1975	1970
הוגה השיטה	Johan Kjeldahl	Mizrahi and Symbolistic	Csaba Horváth
סוג	Nitrogen Quantification	Degradation Kinetics Method	Separation and Quantification Technique
מקור מכונן	Kjeldahl, J. G. C. T. (1883). Neue Methode zur Bestimmung des Stickstoffs in organischen Körpern. Zeitschrift für Analytische Chemie, 22, 366-383.	Mizrahi, S. (1996). Kinetic models of food quality and shelf-life: A review. Journal of Food Quality, 19(4), 315-340.	Snyder, L. R., Kirkland, J. J., & Dolan, J. W. (2010). Introduction to modern liquid chromatography (3rd ed.). Wiley.
כינויים	Kjeldahl nitrogen determination	ASLT	HPLC, high-pressure liquid chromatography
קשורות	3	3	3
תקציר	The Kjeldahl Method is a classical analytical procedure for determining the total nitrogen content of food products, developed by Johan Kjeldahl in 1883. By measuring total nitrogen and applying a conversion factor specific to the food type, the method indirectly determines crude protein content. Kjeldahl remains the official standard method for protein determination in foods, nutraceuticals, and animal feeds worldwide.	Accelerated Shelf-Life Testing (ASLT) uses elevated temperature and controlled storage conditions to rapidly assess product degradation and predict realistic shelf-life without waiting months. By measuring quality parameters (moisture, acidity, nutrient levels, microbial growth) at accelerated conditions and applying kinetic modeling, ASLT predicts expiration dates and optimal storage parameters before market launch.	High-Performance Liquid Chromatography (HPLC) is an analytical technique that separates, identifies, and quantifies components in a complex food sample by passing the sample through a pressurized column packed with a stationary phase. Developed by Horváth in the early 1970s, HPLC enables rapid, sensitive measurement of nutrients, contaminants, additives, and bioactive compounds in food products with high precision and accuracy.