Arabinose and preparation and use thereof

A method for preparing L-arabinose granules, comprising:

• (1) dissolving L-arabinose starting material in water, adding activated carbon, filtering, and removing the activated carbon to give a clear filtered sugar liquid;
• and
• (2) subjecting 40-55% (v %) of the clear filtered sugar liquid obtained in step (1) to evaporation until sugar degree reaches 55-65% Brix, adding the remaining clear filtered sugar liquid in a fed-batch manner after adding a proper amount of the L-arabinose starting material as seed crystal, and continuing concentration after the fed-batch addition is completed,
• wherein:
• the L-arabinose starting material used as the crystal seed is of 80-100 mesh;
• the seed crystal is added in an amount that is 0.05-1% by mass of the added L-arabinose starting material;
• in step (1), the starting material and the water are in a ratio by mass of 1:(0.5-3);
• in step (2), the sugar liquid is evaporated until sugar degree reaches 55-60% Brix;
• the L-arabinose granulates has an average particle size ranging from 100 μm to 600 μm, and each comprises ≤0.04% galactose and ≤0.05% fructose by mass;
• the L-arabinose is β-L-(+)-arabinose;
• the L-arabinose granulates contain one or more β-L-(+)-arabinose crystals of an orthorhombic crystal system, each crystal having a P212121 space group and unit cell parameters of:
• a=4.78120(10) Å, b=6.43740(10) Å, c=19.50095(3) Å,
• a=90°, β=90°, γ=90°, V=600.208(18) Å3, Z=4, and F (000)=320.0;
• during the fed-batch addition, the degree of supersaturation of the sugar liquid is controlled at between 1.01 and 1.19;
• and the L-arabinose starting material has an L-arabinose purity greater than 99% calculated by area normalization.