Lotus filling is one of the most common fillings used in the moon cake processing industry. Whether it is Cantonese-style moon cakes, Beijing-style moon cakes or Su-style moon cakes, there are many varieties of lotus root fillings. According to the requirements of National Standard No. GB ​​19855-2005 on moon cakes officially released on September 1, 2005, issued on September 2, 2005, the method for detecting the moisture content of lotus root fillings during the processing of moon cakes . And the application of MF-50 rapid moisture analyzer in the rapid method.
Lotus paste is one of the high-sugar and high-fat fillings. If the selected temperature is too low in the rapid moisture measurement method, the entire measurement time will be prolonged. If the temperature is too high, it will be coked and sugar and fat will be increased. Evaporate out and get too high data. The reproducibility is not ideal and it is not the true moisture content.
One: direct drying method
1.1 Principle:
The sample was dried in an oven at 105±2°C and dried under atmospheric pressure until constant weight. The loss weight was water.
1.2 Instruments and Equipment:
1.2.1 analytical balance: Sensitivity 0.0001g (eg: HR-200 GR-200)
1.2.2 electric thermostatic oven; can control the temperature of 105 ± 2 °C.
1.2.3 Samples: glass or aluminum.
1.2.4 Dryer: use calcium chloride or discoloration silica gel as a desiccant.
1.3 Measurement Procedures:
Clean the weighing plate and bake it in an oven at 105±2°C for 1 hour. Take it out and cool it in a desiccator for 30 minutes. After constant weight, weigh on the analytical balance and record the constant weight of each weighing sample. Put 5-10 g of lotus seed sample into the weighing dish and record the weighing result. Do not cover the sample plate and bake for 3-5 hours in a 105±2°C constant temperature bath. Take out, cover the well lid, place in a desiccator to cool for 30 minutes, weigh, and record. After that, it is placed in a thermostatic drying oven and dried for 1 hour, cooled and weighed. And record it. Confirm the sample constant weight.
1.4 Calculation of Measurement Results
1.4.1 Formula: Moisture (%)={(w1-W2)/(w1-w0)}X 100
In the formula: W1 - the weight of the lotus seed sample before drying and the weighing dish, G.
W2—Lian Rong is dried at a constant temperature of 105±2°C in a drying oven and the weight of the weighing dish is measured. G,
W0 - The weight of the weighing plate of constant weight.
II: Fast Measurement Using MF-50 Moisture Analyzer
2.1 Using a halogen heater at constant pressure and drying until the weight is constant, the lost weight is moisture, and the water content is directly displayed on the instrument.
2.2 MF-50 related technical parameters;
Weighing range: 51g
Weighing accuracy: 2mg moisture accuracy 0.05%
2.3 Parameter Setting for Water Content Measurement of Lotus Filler: Mode: Automatic Mode (UA)
Pre-set limits (outage probability): 0.10% or 0.20%.
Drying procedure: using step drying. The details are as follows: The temperature in the first 2-3 minutes is set at 160°C; the second temperature is 115-120°C.
The sample volume of lotus seed: between 2-3g.
The entire measurement time is: within 10 minutes.
The above measurement method is based on the best setting values ​​obtained during the installation and commissioning process when the Pearl River Lianrong Food Factory and Lilifu Foods Co., Ltd. purchased the MF-50 rapid moisture analyzer of our company.
Lotus paste is one of the high-sugar and high-fat fillings. If the selected temperature is too low in the rapid moisture measurement method, the entire measurement time will be prolonged. If the temperature is too high, it will be coked and sugar and fat will be increased. Evaporate out and get too high data. The reproducibility is not ideal and it is not the true moisture content.
One: direct drying method
1.1 Principle:
The sample was dried in an oven at 105±2°C and dried under atmospheric pressure until constant weight. The loss weight was water.
1.2 Instruments and Equipment:
1.2.1 analytical balance: Sensitivity 0.0001g (eg: HR-200 GR-200)
1.2.2 electric thermostatic oven; can control the temperature of 105 ± 2 °C.
1.2.3 Samples: glass or aluminum.
1.2.4 Dryer: use calcium chloride or discoloration silica gel as a desiccant.
1.3 Measurement Procedures:
Clean the weighing plate and bake it in an oven at 105±2°C for 1 hour. Take it out and cool it in a desiccator for 30 minutes. After constant weight, weigh on the analytical balance and record the constant weight of each weighing sample. Put 5-10 g of lotus seed sample into the weighing dish and record the weighing result. Do not cover the sample plate and bake for 3-5 hours in a 105±2°C constant temperature bath. Take out, cover the well lid, place in a desiccator to cool for 30 minutes, weigh, and record. After that, it is placed in a thermostatic drying oven and dried for 1 hour, cooled and weighed. And record it. Confirm the sample constant weight.
1.4 Calculation of Measurement Results
1.4.1 Formula: Moisture (%)={(w1-W2)/(w1-w0)}X 100
In the formula: W1 - the weight of the lotus seed sample before drying and the weighing dish, G.
W2—Lian Rong is dried at a constant temperature of 105±2°C in a drying oven and the weight of the weighing dish is measured. G,
W0 - The weight of the weighing plate of constant weight.
II: Fast Measurement Using MF-50 Moisture Analyzer
2.1 Using a halogen heater at constant pressure and drying until the weight is constant, the lost weight is moisture, and the water content is directly displayed on the instrument.
2.2 MF-50 related technical parameters;
Weighing range: 51g
Weighing accuracy: 2mg moisture accuracy 0.05%
2.3 Parameter Setting for Water Content Measurement of Lotus Filler: Mode: Automatic Mode (UA)
Pre-set limits (outage probability): 0.10% or 0.20%.
Drying procedure: using step drying. The details are as follows: The temperature in the first 2-3 minutes is set at 160°C; the second temperature is 115-120°C.
The sample volume of lotus seed: between 2-3g.
The entire measurement time is: within 10 minutes.
The above measurement method is based on the best setting values ​​obtained during the installation and commissioning process when the Pearl River Lianrong Food Factory and Lilifu Foods Co., Ltd. purchased the MF-50 rapid moisture analyzer of our company.