CN104990877A - Method for detecting irradiation dose of shrimp and shellfish peeled aquatic products on basis of multi-spectral imaging technology - Google Patents
Method for detecting irradiation dose of shrimp and shellfish peeled aquatic products on basis of multi-spectral imaging technology Download PDFInfo
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- CN104990877A CN104990877A CN201510466004.3A CN201510466004A CN104990877A CN 104990877 A CN104990877 A CN 104990877A CN 201510466004 A CN201510466004 A CN 201510466004A CN 104990877 A CN104990877 A CN 104990877A
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Abstract
The invention discloses a method for detecting irradiation dose of shrimp and shellfish peeled aquatic products on the basis of the multi-spectral imaging technology. According to the method, irradiation treatment of different doses is carried out on the shrimp and shellfish peeled aquatic products, the spectral images of the shrimp and shellfish peeled aquatic products are collected through a multi-spectral imaging system, a model of detecting irradiation dose of the shrimp and shellfish peeled aquatic products is established by combining a chemometrics method, and therefore rapid nondestructive testing can be achieved on the irradiation dose of the shrimp and shellfish peeled aquatic products. The method has the advantages that operation is easy, analysis speed is high, test reproducibility is good, and samples do not need to be pre-treated, and the irradiation dose of the shrimp and shellfish peeled aquatic products is detected effectively. The method can help to improve the quality control and true and false identification level of irradiated shrimp and shellfish peeled aquatic products, and can further promote international trade of the irradiated shrimp and shellfish peeled aquatic products.
Description
Technical field
What the present invention relates to is a kind of analytical approach of quality and security of agricultural products, in particular measure shrimp shellfish to shell the technical method of aquatic products irradiation dose, specifically a kind of shrimp shellfish based on multi-optical spectrum imaging technology is shelled the detection method of aquatic products irradiation dose.
Background technology
In recent years, irradiation technique is widely used in food service industry, and its fundamental purpose is sterilizing, desinsection and suppression plant germination.Due to product loss in postpartum can be reduced after radiation treatment, extend the advantage of the aspects such as product shelf life-span, approve by increasing country.Some internal authority mechanisms and relevant departments of various countries all formulate standard to food irradiation, and require clearly to identify irradiated food.But, at present domestic have much clearly do not indicate and have Some Enterprises pursuit interests simply arbitrarily to strengthen irradiation dose through the aquatic products of radiation treatment, not only can destroy the nutritional labeling of product, and may edible safety be affected; Simultaneously in the world also using the important means of irradiation technique as International trade practices.These problems fail effectively to solve, and it highlights and instantly lacks simple, system, feasible irradiation of product method for detecting dose, has had a strong impact on the international trade of irradiated food.
Some effective detection method and means that current irradiation dose is conventional, be mainly thermoluminescence analytic approach, ESR spectrum detection method (ESR), high performance liquid chromatography, application of gas chromatorgraphy/mass method (GC-MS and LC-MS), DNA cleavage product detection method, laser imaging detection method etc.But said method is consuming time, complicated operation, and be not suitable for online Fast nondestructive evaluation.Thus, shell in the detection of aquatic products irradiation dose, in the urgent need to a kind of quick, accurate, easy method detection shrimp shellfish.And multi-optical spectrum imaging technology has quantification, feature that is harmless, that monitor in real time, be applicable to very much the quick detection of aquatic products irradiation dose.Yet there are no both at home and abroad about application multi-optical spectrum imaging technology detect fast shrimp shellfish shell aquatic products irradiation dose related article report.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of shrimp shellfish based on multi-optical spectrum imaging technology to shell the detection method of aquatic products irradiation dose, for the shell irradiation dose of aquatic products of shrimp shellfish measures a kind of method of Fast nondestructive evaluation of providing, its result is accurate.
The present invention is achieved by the following technical solutions:
(1), the choosing and pre-service of raw material
The shrimp shellfish of getting same batch is shelled aquatic products, carry out the radiation treatment of various dose, and using a part for the sample after process as calibration set, another part is as forecast set;
(2), obtain spectrum picture: utilize multi-optical spectrum imaging system all samples to be scanned to the spectrogram information obtained, its scanning optical spectrum scope be 400 ?1000nm;
(3), set up shrimp shellfish in conjunction with chemometrics method to shell aquatic products irradiation dose Quantitative Analysis Model;
Be specially:
1) setting calibration set sample irradiation dose value is modeling actual value;
2) spectral wavelength of calibration set sample and its actual value are through data analysis, in conjunction with chemometrics method Modling model;
3) according to the model set up, the irradiation dose value of forecast set sample is predicted, Forecast of Spectra obtains the irradiation dose value of sample, and analyze itself and shrimp shellfish and to shell the difference of aquatic products irradiation dose actual value, choose precision of prediction to meet the requirements of shrimp shellfish and to shell the model of aquatic products irradiation dose, utilize this model can realize prawn shellfish and to shell aquatic products irradiation dose Fast nondestructive evaluation.
In described step (1), sample is respectively through varying strength irradiating electron beams irradiation.
In described step (2), utilize Videometer Lab multi-optical spectrum imaging system to carry out multispectral scanner to all samples, be specially: first utilize calibration plate to calibrate multi-optical spectrum imaging system, then carry out multispectral scanner.
Described step 2) in, adopt partial least square method, by computing machine Modling model.
Described detection method may be used for designing, set up a set of spectrum can't harm and detect fast shrimp shellfish and to shell the automatic determination and analysis device of aquatic products irradiation dose, and on this basis this application of installation can be expanded to shrimp shellfish and to shell the analytical equipment of fish quality.
The present invention has the following advantages compared to existing technology: the invention provides a kind of shrimp shellfish based on multi-optical spectrum imaging technology and to shell the detection method of aquatic products irradiation dose, the method to be shelled aquatic products irradiation dose method for quick based on the shrimp shellfish of multi-optical spectrum imaging technology, for measure shrimp shellfish shell aquatic products irradiation dose provide a kind of fast, harmless, method accurately.
Accompanying drawing explanation
Fig. 1 be different irradiation dose process peeling shrimp wavelength coverage be 400 ?the average reflectance spectra figure of 1000nm;
Fig. 2 is the relation scatter diagram of calibration set sample actual value and predicted value;
Fig. 3 is the relation scatter diagram of forecast set sample actual value and predicted value.
Embodiment
Elaborate to embodiments of the invention below, the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
Present embodiments provide a kind of shrimp shellfish based on multi-optical spectrum imaging technology to shell the detection method of aquatic products radiation dose, comprise the following steps:
(1) the choosing and pre-service of raw material
Get the freezing peeling shrimp 5 bags of same batch, every bag of 2.5kg; The sample chosen is respectively through 0,1,4,10 and 20kGy irradiating electron beams irradiation (irradiation intensity of the outlet U.S. is 3.5 ~ 4.5kGy usually, and generally acknowledged Safety Irradiation intensity is up to 20kGy); The sample random division calibration set processed and forecast set, in the present embodiment, choosing calibration set sample size is 50, and forecast set sample size is 50.
(2) spectrum picture is obtained
Spectroscopic assay employing Videometer Lab multi-optical spectrum imaging system (Videometer A/S,
denmark), its spectral range be 405 ?970nm.Be specially: first utilize calibration plate (blank, blackboard and geometric point plate) to calibrate multi-optical spectrum imaging system, then calibration set after thawing to step (1) and forecast set peeling shrimp carry out multispectral scanner, obtain original spectrum image;
(3) adopt partial least square method PLS to set up shrimp shellfish to shell aquatic products irradiation dose Quantitative Analysis Model
1) setting sample irradiation dose value is modeling actual value;
2) offset minimum binary PLS recurrence is carried out to the spectral wavelength of calibration set sample and sample modeling actual value, sets up analytical model, be specially:
Step one: decomposed by the spectrum matrix X of spectrum picture after process and concentration matrix Y, its model is:
X＝TP+E
Y＝UQ+F
In above formula: U and T is respectively the score matrix of Y and X, Q and P is respectively the load battle array of Y and X, the error of bringing into when F and E is respectively PLS models fitting Y and X.
Step 2: T and U is done linear regression:
U＝TB
B＝(T
TT)
-1T
TY
Step 3: according to the P value of the decomposition model in above-mentioned steps one and acquisition, calculates the spectrum matrix X of testing sample
prescore T
pre, then try to achieve concentration prediction value Y
pre, be the irradiation dose value of prediction sample:
Y
pre＝T
preBQ
As shown in Figure 2, be the calibration set sample actual value of Modling model and the relation scatter diagram of predicted value.
3) according to the analytical model that calibration set sample is set up, the irradiation dose value of computational prediction collection:
Utilize the discrimination model set up, forecast set sample predicted, obtain comparative result and the relation scatter diagram as shown in Figure 3 of actual value as shown in table 1 below and predicted value:
Table 1: the actual value of forecast set sample and the comparative result of predicted value
Utilize coefficient R, root-mean-square error SEC and predicted root mean square error SEP as the efficiency index of evaluation model precision, wherein, R is higher, SEC and SEP is less, and the precision of model is higher:
In formula, R is related coefficient, and n represents sample number, y
iwith
be respectively measured value and the predicted value of i-th sample in sample sets, comprise calibration set and forecast set;
for the mean value of the measured value of i-th sample in sample sets;
In formula: y
iwith
be respectively measured value and the predicted value of i-th sample in sample sets; N is calibration set sample number, and n is forecast set sample number, and P is number of principal components;
By the prediction to 50 calibration set samples, and compare with its actual value, found that, in forecast set, R value is 0.9778, SEP is 1.7845, illustrates that the prediction effect of verification model is good.
(4) detection of testing sample irradiation dose
Get testing sample, after thawing, utilize Videometer Lab multi-optical spectrum imaging system to carry out multispectral scanner, obtain original spectrum image;
According to the model of above-mentioned foundation, calculate the spectrum matrix X of testing sample to be measured
prescore T
pre, then try to achieve concentration prediction value Y
pre, be the irradiation dose value of testing sample.
Claims (5)
1. to shell based on the shrimp shellfish of multi-optical spectrum imaging technology the detection method of aquatic products irradiation dose, it is characterized in that, comprise the following steps:
(1), the choosing and pre-service of raw material
The shrimp shellfish of getting same batch is shelled aquatic products, carry out the radiation treatment of various dose, and using the sample part after process as being calibration set, another part is as forecast set;
(2), obtain spectrum picture: utilize multi-optical spectrum imaging system all samples to be scanned to the spectrogram information obtained, its scanning optical spectrum scope be 400 ?1000nm;
(3), set up shrimp shellfish in conjunction with chemometrics method to shell aquatic products irradiation dose Quantitative Analysis Model;
Be specially:
1) setting calibration set sample irradiation dose value is modeling actual value;
2) spectral wavelength of calibration set sample and its actual value are through data analysis, in conjunction with chemometrics method Modling model;
3) according to the model set up, the irradiation dose value of forecast set sample is predicted, Forecast of Spectra obtains the irradiation dose value of sample, and analyze itself and shrimp shellfish and to shell the difference of aquatic products irradiation dose actual value, choose precision of prediction to meet the requirements of shrimp shellfish and to shell the model of aquatic products irradiation dose, utilize this model can realize prawn shellfish and to shell aquatic products irradiation dose Fast nondestructive evaluation.
2. a kind of shrimp shellfish based on multi-optical spectrum imaging technology according to claim 1 is shelled the detection method of aquatic products irradiation dose, it is characterized in that, in described step (1), sample is respectively through varying strength irradiating electron beams irradiation.
3. a kind of shrimp shellfish based on multi-optical spectrum imaging technology according to claim 1 is shelled the detection method of aquatic products irradiation dose, it is characterized in that, in described step (2), Videometer Lab multi-optical spectrum imaging system is utilized to carry out multispectral scanner to all samples, be specially: first utilize calibration plate to calibrate multi-optical spectrum imaging system, then carry out multispectral scanner.
4. a kind of shrimp shellfish based on multi-optical spectrum imaging technology according to claim 1 is shelled the detection method of aquatic products irradiation dose, it is characterized in that, described step 2) in, adopt partial least square method, by computing machine Modling model.
5. a kind of shrimp shellfish based on multi-optical spectrum imaging technology according to claim 1 is shelled the detection method of aquatic products irradiation dose, it is characterized in that: described detection method may be used for designing, set up a set of spectrum can't harm and detect fast shrimp shellfish and to shell the automatic determination and analysis device of aquatic products irradiation dose, and on this basis this application of installation can be expanded to shrimp shellfish and shell in fish quality analytical equipment.
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| CN106526648A (en) * | 2016-10-24 | 2017-03-22 | 兰州大学 | Method for measuring gamma-ray absorbed dose of glass solidification |
| CN106770773A (en) * | 2016-12-28 | 2017-05-31 | 舟山出入境检验检疫局综合技术服务中心 | A kind of method that aquatic products are irradiated based on QTRAP UPLC MS/MS technology for detection |
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Application publication date: 20151021 |