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Laser near-infrared rapid detecting method for milk freshness

A near-infrared and freshness technology, applied in color/spectral characteristic measurement, chemical analysis by titration, material analysis by observing the influence of chemical indicators, etc. and other issues to achieve the effect of good practical application value

Inactive Publication Date: 2016-09-28
NEW HOPE SHUANGXI DAIRY SUZHOU CO LTD
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Problems solved by technology

However, milk is not conducive to long-term storage. It will become stale after a long time. Once people drink it, they will feel uncomfortable and may even have serious consequences.

Method used

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Embodiment Construction

[0014] The invention provides a method for rapidly detecting milk freshness by laser near infrared, which includes the following steps:

[0015] Step 1. Sample collection: Collect several milk samples of the same variety produced on different dates, and divide them into calibration set milk samples and test set milk samples;

[0016] Step 2. Acidity value determination: Determine the acidity value of the calibration set milk sample and the test set milk sample. The acidity value range of the calibration set milk sample and the test set milk sample is 20°T~30°T. The acidity value determination method is as follows: Inject 10ml milk sample into a 100ml Erlenmeyer flask and dilute it with 20ml neutral distilled water, then add 0.5% phenolphthalein indicator 0.5ml to mix well, titrate with 0.1mol / L sodium hydroxide standard solution, shake it from time to time until the reddish color disappears within 30 seconds Until it disappears; among them, the acidity value (°T)=10*(V1-V0)*C; V1 i...

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Abstract

The invention relates to a laser near-infrared rapid detecting method for milk freshness. The method comprises the following steps: a plurality of milk samples are collected and divided into the calibration set milk samples and the test set milk samples, the acidity values of the calibration set milk samples and the test set milk samples are measured; near infrared spectrums of the calibration set milk samples and the test set milk samples are measured; a quantitative model of the acidity values of the calibration set milk samples and the fused spectrum of the calibration set milk samples is established; the acidity values of the test set milk samples are predicted through the quantitative model, and compared with those of the calibration set milk samples; the near infrared spectrum of the milk sample to be detected is collected, and the acidity value of the milk sample to be detected is predicted through the quantitative model. The laser near-infrared rapid detecting method for milk freshness is safe, reliable, fast and accurate, and has very high practical application value.

Description

Technical field [0001] The invention relates to the technical field of milk detection, in particular to a method for rapidly detecting milk freshness by laser near infrared. Background technique [0002] Milk is one of the oldest natural beverages, known as "white blood", and its importance to the human body can be imagined; milk is rich in minerals, calcium, phosphorus, iron, zinc, copper, manganese, molybdenum, and Milk is the best source of calcium for the human body, and the ratio of calcium to phosphorus is very appropriate, which is good for calcium absorption. However, milk is not conducive to long-term storage. It will not be fresh over time. Once people drink it, they will experience discomfort and may even bring serious consequences. Summary of the invention [0003] Aiming at the shortcomings in the above-mentioned technology, the present invention provides a safe, reliable, fast and accurate laser near-infrared rapid detection method for milk freshness. [0004] The te...

Claims

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Application Information

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IPC IPC(8): G01N21/25G01N21/78G01N31/16
CPCG01N21/25G01N21/78G01N31/16
Inventor 王铁军史寒琴惠建明
Owner NEW HOPE SHUANGXI DAIRY SUZHOU CO LTD
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