Provided is a process for producing a tea extract having a high recovery rate of non-polymer catechins, a low caffeine content and an improved taste and color tone. As one embodiment of this invention provides, there is provided a process for producing a purified tea extract by adsorbing a tea extract on a synthetic adsorbent, bringing an aqueous solution of an organic solvent or a basic aqueous solution into contact with the synthetic adsorbent to elute non-polymer catechins, and then bringing the eluate into contact with activated carbon in an aqueous solution of an organic solvent.

A tien-cha extract essence characterized by being obtained by subjecting a tien-cha extract to an activated carbon treatment, and a method for producing a fermented food product using the tien-cha extract essence provide a technique which can be replaced for a tien-cha essence obtained by subjecting a tien-cha extract to electrodialysis having various problems, has no effect on flavor while maintaining the effects of the tien-cha extract of increasing the growth ability of lactic acid bacteria and the viability or the like of bifidobacterium bacteria, has an unprecedented effect of increasing the growth ability of bifidobacterium bacteria, and facilitates production and powderization.

The disclosure discloses a nicotinamide dummy template surface molecularly imprinted polymer, a preparation method and application thereof, and belongs to the technical field of chemical materials. The preparation method of the disclosure includes the steps of preparing a modified silica gel carrier, preparing a dummy template surface molecularly imprinted polymer and the like. The disclosure uses nicotinamide, a structural analogue of imidacloprid and acetamiprid, as a dummy template to prepare a silica gel surface molecularly imprinted polymer. The polymer not only can effectively avoid pollution caused by the leakage of template molecules, but also can specifically remove imidacloprid and acetamiprid from water-soluble tea extracts. The removal rate of imidacloprid and acetamiprid is greater than 96% and 93%, respectively, and the loss of tea polyphenols in the extracts is less than 10%. In addition, the molecularly imprinted adsorption column prepared by the disclosure can be eluted with ethanol solution, and the eluted adsorption column can be recycled, so the disclosure can be well applied to the preparation technology of tea extracts and has good application prospects.

A tien-cha extract essence characterized by being obtained by subjecting a tien-cha extract to an activated carbon treatment, and a method for producing a fermented food product using the tien-cha extract essence provide a technique which can be replaced for a tien-cha essence obtained by subjecting a tien-cha extract to electrodialysis having various problems, has no effect on flavor while maintaining the effects of the tien-cha extract of increasing the growth ability of lactic acid bacteria and the viability or the like of bifidobacterium bacteria, has an unprecedented effect of increasing the growth ability of bifidobacterium bacteria, and facilitates production and powderization.

An apparatus and method for the removal of unwanted taste components from beverages is described. The apparatus provides a method for contacting a oleophilic-absorbing surface and/or hydrophobic-absorbing surface of polymer media with a beverage before, during or after it is dispensed so that undesirable flavors are selectively removed from the beverage without removing desirable flavors improving the enjoyment of its consumption.

The disclosure discloses a nicotinamide dummy template surface molecularly imprinted polymer, a preparation method and application thereof, and belongs to the technical field of chemical materials. The preparation method of the disclosure includes the steps of preparing a modified silica gel carrier, preparing a dummy template surface molecularly imprinted polymer and the like. The disclosure uses nicotinamide, a structural analogue of imidacloprid and acetamiprid, as a dummy template to prepare a silica gel surface molecularly imprinted polymer. The polymer not only can effectively avoid pollution caused by the leakage of template molecules, but also can specifically remove imidacloprid and acetamiprid from water-soluble tea extracts. The removal rate of imidacloprid and acetamiprid is greater than 96% and 93%, respectively, and the loss of tea polyphenols in the extracts is less than 10%. In addition, the molecularly imprinted adsorption column prepared by the disclosure can be eluted with ethanol solution, and the eluted adsorption column can be recycled, so the disclosure can be well applied to the preparation technology of tea extracts and has good application prospects.

An apparatus and method for the removal of unwanted taste components from beverages is described. The apparatus provides a method for contacting a oleophilic-absorbing surface and/or hydrophobic-absorbing surface of polymer media with a beverage before, during or after it is dispensed so that undesirable flavors are selectively removed from the beverage without removing desirable flavors improving the enjoyment of its consumption.