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A safe and efficient method for determining aluminum in food

A determination method and high-efficiency technology, which can be used in measurement devices, preparation of test samples, color/spectral properties measurement, etc., can solve the problems of large amount of reagents, high blank value, and long use time, and achieve complete decomposition and simple operation. , the effect of reducing the detection limit

Inactive Publication Date: 2020-05-15
安徽国泰众信检测技术有限公司
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  • Application Information

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Problems solved by technology

[0003] This wet digestion has the following disadvantages: 1. A large amount of harmful gas often occurs; 2. In the early stage of digestion, a large amount of foam overflows easily; 3. The amount of reagents is large, and the blank value is high; Operation; 5. The digestive juice is a mixture of nitric acid and perchloric acid, and there is a danger of explosion when it reacts with organic matter in food at high temperature

Method used

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Embodiment Construction

[0017] The preferred embodiments of the present invention are described in detail below, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0018] The invention provides a safe and efficient method for measuring aluminum in food, which uses a dry ashing method to process samples, including the following steps:

[0019] (1) Weigh an appropriate amount of sample and carbonize it with a resistance furnace;

[0020] (2) Place the carbonized sample in a muffle furnace for ashing at 550°C for 2 hours;

[0021] (3) Take out the ashes and cool it, dissolve it with 1% sulfuric acid, transfer it to a 50mL colorimetric tube to obtain the solution to be tested, and follow up with the colorimetric determination of the national food safety standard GB5009.182-2016.

[0022] When measuring, add a drop of p-nitrophenol ethanol solution to the abov...

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Abstract

The invention relates to a safe and efficient method for determining aluminum in food, which comprises the following steps: (1) weighing a proper amount of sample, and carbonizing by using a resistance furnace; (2) placing the carbonized sample in a muffle furnace for ashing; and (3) taking out the ash, cooling, dissolving with 1% sulfuric acid, and transferring into a 50mL colorimetric tube to obtain a to-be-detected solution. According to the safe and efficient method for determining aluminum in food, no reagent is added basically, so that the blank value is low; the ash content volume of most food after burning is small, so that more samples can be treated, detected components can be enriched, and the detection limit is reduced; organic matters are thoroughly decomposed and the operation is simple.

Description

Technical field: [0001] The invention relates to the technical field of food detection, in particular to a safe and efficient method for determining aluminum in food. Background technique: [0002] "GB 5009.182-2016 National Food Safety Standard Determination of Aluminum in Food First Method Spectrophotometric Method" is wet digestion followed by colorimetric determination. [0003] This wet digestion method has the following disadvantages: 1. A large amount of harmful gas often occurs; 2. In the early stage of digestion, a large amount of foam overflows easily; 3. The amount of reagents is large and the blank value is high; Operation; 5. The digestive juice is a mixture of nitric acid and perchloric acid, and there is a danger of explosion when it reacts with organic substances in food at high temperature. Invention content: [0004] The purpose of the present invention is to provide a simpler, safer and more efficient method for the determination of aluminum in food aga...

Claims

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Application Information

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IPC IPC(8): G01N1/44G01N1/28G01N21/31
CPCG01N1/28G01N1/44G01N21/314
Inventor 陈洪周姚杰李先锋
Owner 安徽国泰众信检测技术有限公司
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