CN105441186A - Process for removing AFB1 in edible vegetable oil - Google Patents

Abstract

The invention discloses a process for removing AFB1 in edible vegetable oil, which comprises the following steps: mixing silicon dioxide, hydrated alumina, sodium hydroxide and water in a mass ratio of (25-35%): (0.5-1%): (5-9%): (55-65%), and heating the obtained mixture for 1-10h in an autoclave so as to separate out molecular sieve crystals; weighting 90-99% of edible oil, heating to 40-80 DEG C, adding 1-10% of the molecular sieve crystals, uniformly mixing, continuing to stir, and filtering the obtained object while the object is hot, so that edible vegetable oil from which AFB1 is removed is obtained, wherein the heating time is 10 min-2 h. According to the invention, AFB1 in edible vegetable oil can be significantly reduced, thereby effectively ensuring the edible security of oil products; the process is simple in operation, and can be implemented without adding more equipment, therefore, the process can be energetically popularized; and through the process, the AFB1 removal rate can reach 90%.

Description

AFB in a kind of removal edible vegetable oil 1technique

Technical field

The invention belongs to edible vegetable oil complete processing field, be specifically related to AFB in a kind of removal edible vegetable oil ₁technique.

Background technology

Aflatoxin is the toxin of growth and breeding after flavus and Aspergillus parasiticus contaminated food.These two kinds of moulds, at occurring in nature ubiquity, are easy to contaminated food products.Aflatoxin affects the pollution of food and degree thereof the different condition by area and seasonal factor and plant growth, results, storage, processing.The farm crop such as peanut, corn are very easy to infected by Aspergillus flavus, aflatoxin is the toxoid produced by flavus and Aspergillus parasiticus metabolism, within 1999, is delimited as one of the strongest known carcinogenic chemical by the Agency for Research on Cancer of the World Health Organization (WHO).The aflatoxin identified at present has B ₁, B ₂, G ₁, G ₂, M ₁, M ₂, P ₁, Q ₁deng kind more than ten, wherein with AFB ₁toxicity and carinogenicity the strongest.

On August 1st, 2003 rises, all enterprises being engaged in rice, face, oil, soy sauce, vinegar process for processing in China within the border, and its product must through going on the market after the assay was approved, AFB ₁must detect.National standard " edible vegetable oil hygienic standard " GB2716-2005 specifies: AFB in peanut oil, Semen Maydis oil ₁must not more than 20 μ g/Kg, AFB in other plant oil ₁must not more than 10 μ g/Kg; State food pharmaceuticals administration general bureau surveys sample edible vegetable oil, AFB in peanut oil ₁again and again occur exceeding standard.

AFB in current removal edible vegetable oil ₁method mainly contain: physical method, chemical process, biological method.Physical method comprises absorption method and irradiation method.Absorption method adds sorbent material in peanut oil, the AFB in absorption peanut oil ₁.The sorbent material of current employing has carclazyte, gac composite adsorption and Special adsorbent product, carclazyte, gac composite adsorption, because it is brought bilgy odour into and needs further high temperature, high vacuum deodorization process after adsorbing, are restricted at pressed oil and giving off a strong fragrance oil use.Pressed oil remains the intrinsic functional ingredient of grease in low temperature liquefaction process, and giving off a strong fragrance oil has strong fragrance, dark liking by consumers in general.Therefore, industry is badly in need of a kind of efficient, safe AFB1 removal sorbent material of exploitation and technique thereof.

Summary of the invention

The object of this invention is to provide AFB in a kind of removal edible vegetable oil ₁technique, AFB ₁clearance reaches 90%.

In order to realize above object, sorbent material used in the present invention is the molecular sieve crystal after hydrothermal synthesis method process.

AFB in a kind of removal edible vegetable oil ₁technique, specifically implement according to following steps:

Step 1: silicon-dioxide, hydrated aluminum oxide, sodium hydroxide, water 25%-35%:0.5%-1%:5%-9%:55%-65% mixing in mass ratio, heats 1h-10h and separates out molecular sieve crystal in autoclave;

Step 2: the edible oil taking 90%-99%, heat 40 DEG C-80 DEG C, the molecular sieve crystal adding 1%-10% mixes, continue stir, heat-up time 10min-2h;

Step 3: after stirring, filtered while hot, obtains removing AFB ₁edible vegetable oil.

The present invention adopts the SiO 2 molecular sieve crystal of independent development effectively can remove AFB in grease as sorbent material ₁, this adsorbent amount is little, and filtration velocity is fast, and residual oil content is low, does not affect the local flavor of pressed oil and giving off a strong fragrance oil.Technological operation is simple, can realize, can widely popularize without the need to increasing more equipment.Remove AFB ₁after good, the product of edible vegetable oil clear, taste flavor meet edible vegetable oil hygienic standard, AFB ₁clearance can reach 90%.

Embodiment

Embodiment 1

By the 26%:1%:8%:65% ratio mixing in mass ratio of silicon-dioxide, hydrated aluminum oxide, sodium hydroxide and water, in autoclave, heat 3h separate out molecular sieve crystal.Take 0.99kg containing AFB ₁peanut oil, be heated to 50 DEG C, add 0.01kg molecular sieve crystal and mix, continue stir, heat-up time 20min, filtered while hot obtain remove AFB ₁peanut oil.

The result of front and back removed by table 1

Result (μ g/kg) before process	Result (μ g/kg) after process	Clearance
			42.68	3.37	92.1％

Embodiment 2

By the 30%:0.5%:8%:61.5% ratio mixing in mass ratio of silicon-dioxide, hydrated aluminum oxide, sodium hydroxide and water, in autoclave, heat 5h separate out molecular sieve crystal.Take 0.90kg containing AFB ₁semen Maydis oil, be heated to 70 DEG C, add 0.1kg molecular sieve crystal and mix, continue stir, heat-up time 80min, filtered while hot obtain remove AFB ₁semen Maydis oil.

The result of front and back removed by table 2

Result (μ g/kg) before process	Result (μ g/kg) after process	Clearance
			47.95	3.07	93.6％

Embodiment 3

By the 35%:0.7%:6%:58.3% ratio mixing in mass ratio of silicon-dioxide, hydrated aluminum oxide, sodium hydroxide and water, in autoclave, heat 8h separate out molecular sieve crystal.Take 0.94kg containing AFB ₁semen Maydis oil, be heated to 65 DEG C, add 0.06kg molecular sieve crystal and mix, continue stir, heat-up time 1.5h, filtered while hot obtain remove AFB ₁semen Maydis oil.

The result of front and back removed by table 3

Result (μ g/kg) before process	Result (μ g/kg) after process	Clearance
			40.19	2.68	93.3％

Claims (1)

1. remove AFB in edible vegetable oil for one kind ₁technique, it is characterized in that, implement according to following steps:

Step 1: by the 25%-35%:0.5%-1%:5%-9%:55%-65% mixing in mass ratio of silicon-dioxide, hydrated aluminum oxide, sodium hydroxide, water, heat 1h-10h and separate out molecular sieve crystal in autoclave;

Step 2: the edible oil taking 90%-99%, heat 40 DEG C-80 DEG C, the molecular sieve crystal adding 1%-10% mixes, continue stir, heat-up time 10min-2h;

Step 3: after stirring, filtered while hot, obtains removing AFB ₁edible vegetable oil.