Method for determining lead content in food
A determination method and technology of lead content, applied in the preparation of test samples, measurement devices, color/spectral characteristics measurement, etc., can solve problems such as human hazards
Inactive Publication Date: 2021-05-18
ZHENJIANG HUADA DETECTION CO LTD
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Problems solved by technology
[0004] Aiming at the deficiencies in the prior art, the present invention provides a method for measuring lead content in food, which solves the problem that the level of lead content in food is more harmful to the human body. At present, there is no better method for measuring lead content in food. A Determination Problem of Lead Content
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[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0038] see figure 1 : a kind of assay method to lead content in food, it is characterized in that: comprise the following steps,
[0039] (1) Prepare reagents and prepare reagents;
[0040] (2) Prepare standard solutions and prepare instruments and equipment;
[0041] (3) Prepare the sample;
[0042] (4) The samples were pretreated by wet dige...
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The invention discloses a method for measuring the content of lead in food. The method comprises the following steps: preparing a reagent and preparing the reagent; preparing a standard solution and preparing instruments and equipment; preparing a sample; respectively pretreating a sample by adopting wet digestion, microwave digestion and pressure tank digestion; preparing a sample solution, preparing a standard curve, determining the sample solution, digesting the sample, atomizing by a graphite furnace, and determining the absorbance at 283.3 nm. The absorbance value of lead in a certain concentration range is in direct proportion to the content of lead, and compared with a standard series, the absorbance value is quantitative, so that the content of lead in food can be well measured. The method solves the problems that the lead content in the food has great harm to the human body, and no good determination method for determining the lead content in the food exists at present.
Description
technical field [0001] The invention relates to the technical field of determination of lead content, in particular to a method for determination of lead content in food. Background technique [0002] Food refers to all kinds of finished products and raw materials for human consumption or drinking, as well as items that are both food and traditional Chinese medicinal materials according to tradition, but does not include items for the purpose of treatment. Food is defined as: substances available for human consumption or drinking, including processed foods, semi-finished products and unprocessed foods, excluding tobacco or substances that are only used as medicines. [0003] Lead is a metallic chemical element and the non-radioactive element with the largest atomic weight. Metallic lead is a face-centered cubic crystal, and the level of lead content in food is more harmful to the human body. At present, there is no good method for the determination of lead content in food. ...
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IPC IPC(8): G01N21/31G01N1/44
CPCG01N21/3103G01N1/44
Inventor 赵亮崔海月张莉李丹韩文书顾玉莲伏容
Owner ZHENJIANG HUADA DETECTION CO LTD