A kind of method for determination of hemicellulose content in the production of xylo-oligosaccharides with viscose wastewater
A technology of hemicellulose and xylooligosaccharides, which is applied in the direction of measuring devices, phase influence characteristic measurement, instruments, etc., can solve the problems of large influence on test results, large test data errors, long test time, etc., to achieve the solution of experimental data Effects of instability, improved accuracy, and short detection cycle
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Embodiment 1
[0035] The present embodiment provides a kind of method of hemicellulose content determination in producing xylo-oligosaccharide with viscose waste water, comprises the following steps:
[0036] 1) Establish a standard curve: S1 Preparation: Weigh 100g of hemicellulose and add it to 1L of distilled water, stir until completely dissolved to obtain a standard product with a concentration of 100g / L; then dilute the standard product into 5 standard solutions with different concentrations, namely 50g / L, 60g / L, 70g / L, 80g / L, 90g / L; then take 50mL of standard solution, add 10mL of lye with a concentration of 200g / L respectively, and let it stand for 8min; S2 measurement: use refraction Instrument detects respectively the content of reducing sugar solids generated in the standard solution, and the recorded data are shown in Table 1;
[0037] Table 1
[0038] Standard solution concentration (g / L) 50 60 70 80 90 Reducing sugar solid content (%) 12.09 12.85 13.76 ...
Embodiment 2
[0049] The present embodiment provides a kind of method of hemicellulose content determination in producing xylo-oligosaccharide with viscose waste water, comprises the following steps:
[0050] 1) Establish a standard curve: S1 Preparation: Weigh 100g of hemicellulose and add it to 1L of distilled water, stir until completely dissolved to obtain a standard product with a concentration of 100g / L; then dilute the standard product into 5 standard solutions with different concentrations, namely 40g / L, 50g / L, 60g / L, 70g / L, 80g / L; then take 50mL of standard solution, add 10mL of lye with a concentration of 200g / L, and let it stand for 10min; S2 measurement: use refraction Instrument detects respectively the content of reducing sugar solids generated in the standard solution, and the recorded data are shown in Table 3;
[0051] table 3
[0052] Standard solution concentration (g / L) 40 50 60 70 80 Reducing sugar solid content (%) 11.20 12.04 12.95 13.84 14.7...
Embodiment 3
[0063] On the basis of embodiment 1, standard solution and sample solution are processed with different concentrations of lye, and the statistics of the obtained results are shown in Table 5 below:
[0064] table 5
[0065]
[0066]
[0067] On the basis of Table 5, through further analysis, draw: When the concentration of sodium hydroxide solution is less than 100-200g / L, the hemicellulose in the standard solution and the sample solution is not completely dissolved into soluble reducing sugar, and the undissolved hemicellulose Cellulose is in a suspended state; when using a refractometer to detect reducing sugar solid content, only dissolved hemicellulose content can be detected, and this will cause the detected reducing sugar solid content to be lower than the actual reducing sugar solid content , so that the hemicellulose measurement results are low, which seriously affects the accuracy of detection.
[0068] When the concentration of sodium hydroxide solution is 100...
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