The quality of rice has always been an important issue in China, and the effect of rice amylose content on its quality is very important. Determination of amylose can be measured with a starch analyzer, and the current widely used Juliano ratio The color method is used by China's national standard method. Scan WeChat for more: Heating insulation for a Brazed Plate Heat Exchanger is important to minimize heat loss and improve the overall efficiency of the system. Some common insulation materials used for this purpose include: Titanium Pool Heat Exchanger Epp Insulation, heat exchanger heating insulation, brazed heat exchanger heating insulation Jiangsu Baode Heat-Exchanger Equipment Co.,LTD , https://www.baodeexchanger.com
Amylose determination of the sample determination of the sample dispersion: Weigh the sample equivalent to 0.10008 crude starch in 100mL volumetric flask by adding 1mL of anhydrous ethanol, fully wet the sample, then add 9mLlmol / L of NaOH solution, placed in a boiling water bath dispersion lOmin Rapid cooling with water to volume. Degreasing: Take 20mL of the dispersion in SOmL stoppered test tube by adding 7mL of petroleum ether, shake off lOmin, let stand for 15min, layered and sucked with the suction pipe connected to the pump, suck the upper layer of petroleum ether . Repeat the operation 2}3 times (2 times for polished rice, 3 times for corn and millet). Determination: After degreasing the alkaline dispersion S.OOmL in a 100mL volumetric flask, add water SOmL, then add 1mLlmol/L acetic acid and 1mL iodine reagent, water to volume. After lOmin was developed, the absorbance was read at 635nm.
In the measurement of amylose, the absorption curve reflects the light absorption ability of the substance at different wavelengths, and it can select the measurement wavelength for quantitative analysis. Usually, the maximum absorption wavelength is selected as the measurement wavelength, and the absorbance is measured at this wavelength, the sensitivity is the highest. It is an absorption curve of starch-iodine test solution issued by the Rice Research Institute of Chinese Academy of Agricultural Sciences. It reflects the ability of the starch solution to absorb light at different wavelengths. 
1. Mineral Wool: Mineral wool is a popular choice for insulation due to its excellent thermal properties and fire resistance. It is available in various forms, such as blankets or boards, and can be easily cut and shaped to fit the heat exchanger.
2. Foam Insulation: Foam insulation, such as polyurethane or polystyrene, is lightweight and offers good thermal insulation. It is often used in applications where space is limited or weight reduction is desired.
3. Fiberglass: Fiberglass insulation is widely used in industrial applications due to its low cost and good thermal insulation properties. It is available in various forms, such as batts or loose fill, and can be easily installed around the heat exchanger.
4. Ceramic Fiber: Ceramic fiber insulation is known for its high-temperature resistance and low thermal conductivity. It is commonly used in applications where the heat exchanger operates at high temperatures.
When selecting insulation for a brazed plate heat exchanger, it is important to consider factors such as the operating temperature, space limitations, and fire safety requirements. Additionally, proper installation and sealing of the insulation are crucial to ensure maximum effectiveness.