Quantitative determination instrument for melamine content in liquid milk

Abstract

The invention discloses a quantitative detection instrument for the content of melamine in liquid milk, which comprises a laser device, a light-dividing device, a focusing mirror, a reagent bottle holder for fixing a reagent bottle, an optical fiber coupler, and a spectrum detection device, wherein the reagent bottle holder is provided with a light transmission hole; the laser emitted by the laser device orderly passes through the light-dividing device, the focusing mirror and the light transmission hole and then is focused in a liquid milk sample in the reagent bottle ;, an optical signal which is reflected backward illuminates the light-dividing device through the light transmission hole and the focusing mirror; and the optical signal reflected by the light-dividing device passes through the optical fiber coupler through a conductive light path and then enters the spectrum detection device for detection. The quantitative detection instrument has the advantages of simple and compact structure, convenient use, and low cost, reduces the requirement on light path alignment of detection instruments, does not need performing light path adjustment, has short detection time, also reduces the cost for using consumptive materials at the late stage, and can quickly and accurately detect the content of the melamine in the liquid milk.

Description

technical field [0001] The invention relates to a quantitative detector for substance content, in particular to a quantitative detector for melamine content in liquid milk. Background technique [0002] The Sanlu milk powder incident sounded the alarm for food safety and dealt a huge blow to China's dairy industry. After the incident, due to the lack of rapid and effective detection methods in the on-site purchase of raw milk, a vicious circle of dairy farmers had no choice but to dump the milk and kill the cows because no one dared to accept the fresh milk. The General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and the National Standardization Management Committee approved and released the national standard "Measurement Method for Melamine in Raw Milk and Dairy Products" (GB / T 22388-2008) on October 7, 2008, which stipulates the high performance liquid chromatography method , Gas chromatography-mass spectrometry, liqu...

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Problems solved by technology

[0002] The Sanlu milk powder incident sounded the alarm for food safety and dealt a huge blow to China's dairy industry

For example, in the patent publication with the publication number CN1584555A and the name "A Quick Measuring Instrument for Petroleum Product Quality Based on Low-resolution Raman Spectroscopy", a measuring device for detecting the quality index of petroleum products using Raman spectroscopy is proposed. Lateral Raman signal reception, so the sample reagent bottle is required. When using a common round reagent bottle as the sample container, it is necessary to use the adjustment device to adjust the focus before each measurement. The operation steps are complicated and the detection time is prolonged. And the detection accuracy is low. If the common round reagent bottle is not used, it is necessary to specially manufacture or purchase a reagent bottle that meets the requirements, which makes the cost of consumables too high

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