A method for rapid determination of chromium content in dairy products by direct sampling
A technology for rapid determination of dairy products, applied in measurement devices, measurement of color/spectral properties, material analysis by optical means, etc., can solve problems such as sample loss, contamination, complex determination methods of chromium content in food, etc., to improve accuracy Effect
Active Publication Date: 2019-01-18
浙江华才检测技术有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a method for direct sampling and rapid determination of chromium content in dairy products. or technical issues that are more likely to be contaminated
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[0022] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail through the following examples. However, it should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.
[0023] The embodiment of the present invention provides a method for direct sampling and rapid determination of chromium content in dairy products, comprising the following steps:
[0024] Step 1. Sample dilution: Accurately weigh a certain amount of dairy product sample in a beaker, pre-dissolve it with a small amount of ultrapure water, transfer it to a 50mL volumetric flask, and dilute it to 50mL with ultrapure water to o...
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The invention is applicable to the technical field of food safety testing and discloses a method for directly injecting a sample and rapidly determining chrome content in a dairy product. The method comprises the following steps: diluting a sample, setting instrument parameters, drawing a standard curve, determining a sample solution and quantifying by adopting a standard curve process so that the chrome content in the dairy product can be rapidly and accurately determined. The method for directly injecting the sample and rapidly determining the chrome content in the dairy product has the advantages that a graphite furnace-atomic absorption spectrometer provided with a pyrolysis coating type graphite tube is adopted for determination, parameters such as temperature, time and gas flow of a graphite furnace heating procedure are optimized, determination accuracy is improved, sample pre-treatment is not needed, automatic sample injection analysis can be applicable only by carrying out simple solution dilution on the sample, a sample treatment step is simplified, and sample loss or the probability that the sample is polluted is also reduced.
Description
【Technical field】 [0001] The invention relates to the technical field of food safety detection, in particular to a method for directly sampling and quickly determining the chromium content in dairy products. 【Background technique】 [0002] With the development of industry, all kinds of pollution in food are becoming more and more serious. Because chromium has a good electronic layer structure, it has been endowed with special industrial application value. It is used in electroplating, cocoon making, dyes, pigments and organic synthesis, etc. In the field, chromium has been widely and irreplaceably used. When all kinds of chromium-containing sewage are discharged into the environment and pollute the soil and water, then the chromium is gradually absorbed by the plants and fish growing in this area, and finally becomes the food in the belly of human beings at the top of the food chain. Chromium is irritating and corrosive to the skin, mucous membranes, and digestive tract, ca...
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IPC IPC(8): G01N21/31
CPCG01N21/3103
Inventor 廖杰斯广杰斯佳彬
Owner 浙江华才检测技术有限公司