CN1025651C - Process for preparation of preserved low-sugar sweet potatoes - Google Patents

Abstract

The present invention relates to a processing method of food in a sweetmeat class. High-quality red-pulp fresh sweet potatoes are adopted as raw material; the raw material is cut into potato strips after being peeled; the potato strips are soaked in mixing solution containing alums and sodium metabisulfite for 8 to 10 hours; afterwards, the soaked potato strips are put into boiling syrup for one-time cooking; finally, the ripe potato strips are put in a baking chamber to being baked to obtain completed products. Preserved sweet potatoes produced by the present invention have the advantages of high component of nutrients, rich vitamin C, rich vitamin A, eyesight improvement, disease resistance, cancer resistance, convenient and rapid fabrication technology, less sugar consumption, low cost, moderate sugar content of products, and moderate sweet taste; the present invention is suitable for the requirements of modernist.

Description

Process for preparation of preserved low-sugar sweet potatoes

The present invention relates to a kind of processing method of food, particularly the processing method of preserved fruit based food.

Traditional preserved fruit (as preserved pears, preserved peach, preserved apple etc.) processing technology is that raw material is cut into bulk or keeps fruit original shape (as preserved apricot), again with sulphur or limewash preliminary treatment, thereafter sugaring or salt marsh, carry out sugar system operation again, be generally and repeatedly boil established law, also adopt repeatedly sugaring once to boil, it is high with the sugar amount, with sugar amount and raw material ratio is 1: 1, and the finished product sugar content is more than 65%.And liquid glucose is through the repeated multiple times infusion, and overstrike is made waste saccharide liquid and handled, and its waste saccharide liquid loss is big, and manufacturing procedure is also loaded down with trivial details, and expense is big, the cost height.Traditional preserved sweet potatoes also is to use the method processing and fabricating, and it selects materials extensive, and raw material nutrition is lower, and particularly carotene carotene content is low or do not have, and potato meat is yellowish or white, and color and luster is bad.In addition, above-mentioned preserved fruit based food sugar content is all more than 65%, distinguishes the flavor of too sweet and not only greasy but also sticking, and incompatible current people are to the new demand of food.

Purpose of the present invention is exactly for addressing the above problem, and proposes a kind of processing method of low-sugar sweet potato dried meat nutritious, with low cost.

Technical solution of the present invention is:

1. select content of starch 9-15% for use, fiber content about 3%, the every hectogram of carotene carotene content is more than 2.5 milligrams, sugar content reaches good in oxidation resistance more than 4% the bright sweet potato of red heart is a raw material, after raw material washing, peeling, cutting growth 2.0-6.5cm, the wide and thick square square bar of 0.7-1.0cm that is.

2. the bright potato side bar that will cut is put into and is contained alum 0.2-1.0%, contains in the aqueous solution of Sodium Metabisulfite 0.05-0.5% to soak 8-10 hour.

3. the French fries that will soak pick up in clear water and wash 3-4 time, putting into boiling water again scalded 4-5 minute, put into then and contain soluble sugar 40-70%, contain to boil in the liquid glucose that boils of citric acid 0.1-0.4% and can take the dish out of the pot in 20 minutes into drying room, the French fries raw material is about 0.8-1 with the ratio of liquid glucose: 1.

4. well-done French fries are put into drying room baking 10-12 hour, temperature is 55-80 ℃, makes the water content of French fries can take out packing about 17%, just obtains potato dried meat finished product.

In the inventive method,, make their sugar in candy operation penetrate into easily, once boil, reduced operational sequence bright potato cutting slivering.French fries are put into alum 0.2-1.0%, contain in the aqueous solution of Sodium Metabisulfite 0.05-0.5% and soak, its effect is to make the raw material sclerosis, be difficult for by well-done, and protection raw material Natural color, unlikely browning.The present invention in the liquid glucose that candy operation is selected for use owing to added a certain amount of citric acid, then through candy operation, wherein a part of soluble sugar promptly is converted into hydrolysis sugar, changed traditional handicraft and in candy operation, all will add a part of maltose, made product quality better so that product contains the way of certain proportion hydrolysis sugar.

In China, before the cultivated area of sweet potato and the output Jun Ju world, exploitation sweet potato product has very big social benefit and economic benefit.Sweet potato contains multivitamin, especially be rich in carrotene and vitamin C, the bright sweet potato of every hectogram red heart contains carrotene 1.5-8 milligram, every day, edible 50-200 restrained the needs that bright potato can satisfy human body, ascorbic content is equivalent to apple, pears, grape 1-3 times, and the bright potato of edible 100 grams every day can be human body provides 25-30% vitamin C.Also contain health care in the sweet potato and be worth higher mucus protein, can reduce inflammation so that the generation of cancer has special protective effect to human body.In addition, it also contains special hormonal substance-steroids, control and palliating leukemia are arranged, the effect of breast cancer, sweet potato still is a kind of physiological alkalinity food, mineral matters such as the calcium that it contains, phosphorus, iron, can in and the body internal cause often eat acid food such as meat, egg, rice, face and the too much acid that produces, human acid-base balance in the body is good for one's health.

It is that raw material is processed into preserved sweet potatoes that the present invention selects excellent sweet potato for use, and its finished product sugar content is 35-42%, moisture content about 17%, 2 milligrams of the every hectograms of vitamin C, the every hectogram of carrotene is more than 2 milligrams, and finished product is golden yellow or golden red, glossy, transparent, piece shape is complete, the appearance densification, matter is soft not thick and stiff, flexible slightly, and mouthfeel is good, agreeably sweet, tack-free.Product of the present invention is because the nutrition height, be rich in vitamin C and vitamin A (being carrotene), have make eye bright, disease-resistant effect such as anticancer, can prevent to see that eyesight such as TV descends, food fiber have anti-treat constipation, effect such as intestinal cancer, be a kind of novel TV and travel food.It is easy, quick that the present invention adds technology, and the product sugar content is moderate, and is agreeably sweet, the demand that is fit to the modern, it processes with the sugar amount few, is traditional preserved fruit 45% of sugar amount, and operational sequence is easy, waste saccharide liquid is few, cost is lower, is 2/3rds of traditional preserved fruit production cost, its good product quality, do not add any pigment, color and luster, mouthfeel belong to superior.This product in some areas trial sale, is subjected to consumers in general's favor deeply, and nineteen ninety was once obtained Jiangsu Province's science and technology new product gold medal.

Embodiment:

Get bright sweet potato (or 50 kilograms of the bright sweet potatoes of No. 2 kinds in Beijing of peaceful 15-33 kind, peeling, be cut into long 3cm, wide, the thick French fries that are 0.8cm, cut out about 40 kilograms of French fries, the French fries that cut are put into by containing alum 0.7%, contain in the aqueous solution of Sodium Metabisulfite 0.1% and soaked 8 hours, pick up then in clear water and wash 3-4 time, putting into boiling water again scalded 4-5 minute, put into and contain white granulated sugar 60% scalding good French fries, contain to boil in the liquid glucose that boils of citric acid 0.25% and picked up in about 20 minutes, liquid glucose weight is 50 kilograms, the French fries after candy is sent into drying room dry by the fire under 65 ℃ temperature and made the product water content can go out drying room in 10-12 hour about 17%, the French fries of above-mentioned baking is mixed Icing Sugar can pack, like this can about 20 kilograms of finished products, finished product sugar content about 40%.

Claims (2)

1, a kind of low-sugar sweet potato dried meat processing method, it is characterized in that it selects content of starch 9-15% for use, fiber content 3%, the every hectogram of carotene carotene content is more than 2.5 milligrams, sugar content reaches good in oxidation resistance more than 4% the bright sweet potato of red heart is a raw material, with its washing, peeling, put into behind the slitting and contain alum 0.2-1.0%, contain in the aqueous solution of Sodium Metabisulfite 0.05-0.5% and soaked 8-10 hour, the French fries that will soak pick up to wash in clear water put into boiling water for 3-4 time boiling hot 4-5 minute again, put into then and contain soluble sugar 40-70%, contain in the liquid glucose that boils of citric acid 0.1-0.4% and boiled 20 minutes, once boil and become to take the dish out of the pot into drying room, the French fries raw material is 0.8-1 with the ratio of liquid glucose: 1, and last drying, packaging process promptly obtains preserved sweet potatoes finished product of the present invention.

2, by the described low-sugar sweet potato dried meat of claim 1 processing method, it is characterized in that the described aqueous solution contains alum 0.7%, contains Sodium Metabisulfite 0.1%.