The samples before the fiber measurement experiment and the actual method of preparation differ in the cellulose content of various grains and are proportional to the thickness of the seed cortex. With the same kind of grain, the raw grain has the highest cellulose content, the higher the processing precision, and the lower the cellulose content. Therefore, through the determination of cellulose content, it can be used as a basis for judging the thickness of the seed cortex and evaluating the accuracy of processing. The traditional determination of fiber content is acid, alkali, alcohol, and ether washing methods. Due to the cumbersome manual operation, not only the measurement time is relatively long, but also the measurement result has a large artificial error, in order to avoid the artificial largeness in the measurement process. The error, and research on the crude fiber analyzer to determine the crude fiber content in grain, this crude fiber analyzer is a set of instruments that use chemical and physical combination to complete crude fiber analysis and analysis. During the measurement process, the instrument will collect acid. Alkaline treatment and rinsing are all integrated into one. The design of the whole is a totally enclosed structure. It uses electric heating to heat directly, and can make 6 samples at the same time, which saves the time waste of measurement, and the sample does not need to be transferred during operation. The crude fibres in the sample are separated out so that accurate and rapid results can be achieved. It is the best measuring instrument for crude fiber determination.
The two steps of reagent configuration and sample preparation are performed prior to the measurement using the crude fiber analyzer. These two steps are the same regardless of whether the measurement is performed using the instrument or the conventional method. The method of configuration is as follows: Reagent preparation 1 Sulfuric acid solution (0.128 mol/L): Take 15 ml of concentrated sulfuric acid and dilute it with distilled water to 2000 ml. Adjust with a known concentration of NaOH solution. 2 Sodium hydroxide solution (0.312 mol/L): Weigh 28 g of NaOH, dilute to 2000 ml with distilled water, and adjust with potassium hydrogen phthalate reference material.
Sample Preparation 1 Take a representative sample, pick out the impurities, and take about 25g in quarters. The fineness of the milled sample is all passed through a 20-mesh sieve and stored in a jar. 2 If the fat content in the sample exceeds 10%, it is necessary to degrease, and the residue after extraction of the fat may be used as a sample, or the fat of the sample may be extracted with ether. 3 The crucible (10) was rinsed, dried in an oven at 105°C, cooled, and stored in a desiccator.
The two steps of reagent configuration and sample preparation are performed prior to the measurement using the crude fiber analyzer. These two steps are the same regardless of whether the measurement is performed using the instrument or the conventional method. The method of configuration is as follows: Reagent preparation 1 Sulfuric acid solution (0.128 mol/L): Take 15 ml of concentrated sulfuric acid and dilute it with distilled water to 2000 ml. Adjust with a known concentration of NaOH solution. 2 Sodium hydroxide solution (0.312 mol/L): Weigh 28 g of NaOH, dilute to 2000 ml with distilled water, and adjust with potassium hydrogen phthalate reference material.
Sample Preparation 1 Take a representative sample, pick out the impurities, and take about 25g in quarters. The fineness of the milled sample is all passed through a 20-mesh sieve and stored in a jar. 2 If the fat content in the sample exceeds 10%, it is necessary to degrease, and the residue after extraction of the fat may be used as a sample, or the fat of the sample may be extracted with ether. 3 The crucible (10) was rinsed, dried in an oven at 105°C, cooled, and stored in a desiccator.
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