Page 33 - Food&Beverages Solution Palm Oil

Differential Scanning Calorimeter (DSC) Thermogravimetric Analyzers (TGA)

Oil and fat products are generally mixtures of multiple components, and the melting process is complex. This investigation, starting from minus Properties of cooking oil, such as taste, smell and color, change with long-term storage or heating. The main cause of these changes is
temperatures, is effectively conducted using DSC analysis. In this situation, aside from the requirement to determine such characteristics as oxidation. TG (Thermogravimetry) can measure the changes in mass due to oxidation. The results of TG can be used to determine storage
melting temperature and heat of fusion, it is also possible to perform heat treatment due to precise temperature control, and to investigate the conditions, estimate shelf life and evaluate antioxidants. In this example, salad oil was heated in oxygen. Absorption of oxygen began at
heat history and apparent changes in crystalline structure. The example here shows lipstick and chocolate were analyzed using an electric 153.5˚C and the weight increased by 0.95%. The surface area of the sample influences the weight increase. This test used a special cell
cooling DSC. In particular, measurement of chocolate was performed using repetitive heating and cooling cycles. with a 10 ø diameter.

Analytical Conditions
Instrument :TGA-50 Atmospheric gas :Oxygen
Sample name :Salad oil Gas flow rate :30 mL/min
Sample weight :22.85 mg [Temperature program]
Heating rate :2˚C/min

Melting of Chocolate Comparison of Three Lipsticks

Reference: Application Note No. T135A Measurement of Fats with DSC

TG curve for salad oil in oxygen

Reference: Application Data Book Food and Pharmaceutical: Degradation of Cooking Oil by Oxidation (C160-E009A)

Shimadzu Differential Scanning Calorimeter Product Lineup Shimadzu Thermogravimetric Analyzer Product Lineup

Model Features Model Features

· High-sensitivity measurements with noise level less than 0.5 µW The TGA-50 series comprises:
· Wide calorimetric measurement range at ±150 mW · TGA-50 model with maximum temperature of 1,000°C and a sample mass up to 1 g
· Automated measurement improves efficiency (up to 24 samples) · TGA-50H model with a maximum temperature of 1,500°C and a sample mass up to 1 g
· Enables sub-ambient measurements (-140ºC) using standard cooling chamber
· Large selection of sample pans The TGA-51 series comprises:
· Optional analytical laboratory regulation compliance, including US FDA 21 CFR Part 11 · TGA-51 model with a maximum sample mass of 10 g and a maximum temperature of 1,000°C
· TGA-51H model with a sample mass up to 10 g and a temperature range between ambient and 1,500°C
· Quantification of minute mass changes in various atmospheres with weight readability of 0.1 µg
DSC-60 Plus · Automated gas switching and cooling options
TGA-50/50H/51/51H · Large selection of sample cells
· Optional analytical laboratory regulation compliance, including US FDA 21 CFR Part 11

Solutions for Palm Oil Analysis Application Notebook
32 33