CN103837490A - Method for detecting oil steam based on infrared spectroscopic analysis - Google Patents
Method for detecting oil steam based on infrared spectroscopic analysis Download PDFInfo
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- CN103837490A CN103837490A CN201410090458.0A CN201410090458A CN103837490A CN 103837490 A CN103837490 A CN 103837490A CN 201410090458 A CN201410090458 A CN 201410090458A CN 103837490 A CN103837490 A CN 103837490A
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Abstract
The invention discloses a method for detecting oil steam based on infrared spectroscopic analysis by taking a polyethylene film as a carrier medium of an oil steam sample. In an infrared spectrum of a small polyethylene film bag with removed background, the polyethylene film has no absorption peak at the range of 4,000cm<-1> to 400cm<-1>, or has two absorption peaks with the light transmittance value greater than or equal to 94.0% only between 2,930cm<-1> and 2,845cm<-1> in the range. The method comprises the following steps: putting a small bag made of the polyethylene film into an infrared light path to remove the background; and filling the bottom of the small polyethylene film bag with an oil sample, sealing the opening of the bag, heating until the upper part of the small bag is fully filled with oil steam, and putting the small bag into a light path to detect. The detection method provided by the invention can be rapidly and accurately used for determining the oil steam infrared spectrum without pollution at low cost without using gas tanks with salt windows of potassium bromide and the like.
Description
Technical field
The invention belongs to Food Inspection detection field, particularly a kind of infrared spectrum detection method of oil vapour.
Background technology
Analyze and detect oil vapour with gas cell with existing infrared spectrum (IR), if oil samples is first heated, get again its steam and inject IR gas cell, oil vapour adheres on collector owing to meeting cold liquefaction on the one hand, make the oil sample vapor volume deficiency in be injected into IR gas cell, or because meeting cold liquefaction and adhere to get on gas device and make the steam in injecting gas pond there is no representativeness getting in gas process certain component of steam; On the other hand, the oil vapour that injects IR gas cell also can form adhesion and residual on its salt window, and then in different sample detection, on salt window, forms multiple contaminates, causes the inaccurate of subsequent sample measurement result.
If oil samples is directly injected in existing IR gas cell because oil samples volatility is low, need heating to produce steam, like this gas cell inwall especially the salt window of gas cell can be subject to serious irreversible membrane fouling, cause thus the inaccurate of subsequent sample measurement result.In addition, if oil samples is directly injected in existing IR gas cell, because existing gas cell is only applicable to be under normal temperature and pressure the detection of gaseous state gas, for this reason, with regard to its pond body structure, can make oil samples directly be attached to the salt window bottom of body both sides, pond, make salt window cause severe contamination.Meanwhile, because capillary action oil may move on salt window, what finally detect may be along the oily liquid film that moves formation on salt window, but not the steam of oil.
Vegetable oil is from the mature seed of plant, to extract the grease obtaining, and animal oil is to extract the grease obtaining from the meat of animal or tissue.Analyzing general detachable bromination sylvite window liquid cell method and the pellet technique of adopting with IR measures.Not yet retrieve at present about the IR of vegetable oil or animal oil steam and detect report.
To sum up, the structure of existing IR gas cell is not suitable for the detection of oil samples steam, also detects at present the method for oil vapour without infrared spectrum.Therefore, how to obtain a kind of pollution-free, cost is low, convenient, measure the detection method based on Infrared spectroscopy oil vapour accurately, be the technical issues that need to address in the testing process of vegetable oil and animal oil at present.
Summary of the invention
The present invention is not suitable for the detection of oil samples steam, problem without the detection method of Infrared spectroscopy oil vapour in order to solve gas cell in currently available technology, provide a kind of fast, economic, the free of contamination spectral method of detection based on Infrared spectroscopy oil vapour.
Technical scheme of the present invention is as follows:
Based on a detection method for Infrared spectroscopy oil vapour, detect as the mounting medium of oil vapour sample using polyethylene film.
Detection method based on Infrared spectroscopy oil vapour of the present invention, described polyethylene film should meet one of following two conditions:
1. with in the infrared spectrogram after the pouch buckle back scape of being made by polyethylene film, at 4000cm
-1to 400cm
-1scope is interior without absorption peak;
2. with in the infrared spectrogram after the pouch buckle back scape of being made by polyethylene film, at 4000cm
-1to 400cm
-1in scope, only at 2930cm
-1to 2845cm
-1between have two absorption peaks, and light transmittance values>=94.0%.
The pouch of being made by polyethylene film of the present invention refer to by polyethylene film make can carrying liquid sample shape, first with polyethylene film pouch buckle back scape while measuring infrared spectrum, light path is successively by polyethylene film-air-polyethylene film, and detect when sample, sample is contained in pouch bottom, in pouch, be full of sample vapor, light path is successively by polyethylene film-sample vapor-polyethylene film.
Described polyethylene film meets the requirement of DB44/T926-2011 and standard GB/T 9687, is selected from the one in density polyethylene film with high, low density polyethylene films and ultra-low density polyethylene film.
The selected polyethylene film of the present invention does not contain affects the composition that oil vapour detects.
The available scope of described polyethylene film is wider, for example food preserving bag, the food bag etc. of commercial tygon material.The present invention's point used breaks formula polyethylene film food bag at 4000cm
-1to 400cm
-1in scope, after the pouch buckle back scape made from polyethylene film, except at 2929.87cm
-1and 2846.93cm
-1have outside two peaks, all without other absorption peaks.And its peak intensity is very weak, the light transmittance values at two peaks all, up to more than 94.0%, does not affect testing result substantially, all can guarantee the reappearance of mensuration, is detected and can be verified by the repeatability of repeatedly measuring of the present invention.
The present invention is that commodity food preserving bag by name and food bag more than ten brands of tygon and high density polyethylene are tested to being purchased from the material in large supermarket simultaneously, all at 2930cm
-1to 2845cm
-1between only have Huo Wu peak, two peaks, the intensity at its peak, light transmittance values is all higher, the light transmittance values at peak all, up to more than 94.0%, does not affect testing result substantially.
And it is pointed out that food fresh keeping membrane is not suitable for the present invention.Although the infrared spectrogram of the infrared spectrogram of food fresh keeping membrane and commercialization food preserving bag, food bag etc. is very approaching, using after double-layer food preservative film buckle back scape, at 2937.59cm
-1to 2843.07cm
-1between peak more, and at 2937.59cm
-1the peak at place is strong, and light transmittance values is only 78%, and so large numerical value has had a strong impact on testing result.
Detection method based on Infrared spectroscopy oil vapour of the present invention, adopts following steps to detect:
1. polyethylene film pouch is put into IR light path buckle back scape;
2. pack liquid oils sample in the bottom of polyethylene film pouch and seal sack, be heated to oil vapour and be full of pouch top, put into infrared light path and detect.
The step of said method 2. in, in the time of application of sample, can not make oil samples adhere on the sidewall film of polyethylene film pouch, while avoiding analytic sample, exert an influence.
Beneficial effect of the present invention have following some:
The first, the detection method based on Infrared spectroscopy oil vapour provided by the invention, without the gas cell using with salt windows such as potassium bromides, infrared spectrum that can quick, pollution-free mensuration oil vapour;
The second, the detection method based on Infrared spectroscopy oil vapour provided by the invention have accurately, the advantage such as low cost, be easy to use in marketing.
Accompanying drawing explanation
Accompanying drawing 16 width of the present invention.
Fig. 1 is the infrared spectrogram of the polyethylene film bag in embodiment 1.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is transmittance (unit: T%).The wave number at infrared spectrogram peak is 2916.37cm
-1, 2848.86cm
-1, 2638.62cm
-1, 2360.87cm
-1, 2335.80cm
-1, 1465.90cm
-1, 1369.46cm
-1, 1305.81cm
-1, 723.31cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Fig. 2 is the infrared spectrogram scanning after the polyethylene film bag buckle back scape in embodiment 1.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is transmittance (unit: T%).The wave number at infrared spectrogram peak is 2929.87cm
-1, 2846.93cm-
1, two peaks are very weak, and transmittance is more than 94%, and concrete peak intensity and peak shape are as the criterion with spectrogram.
Fig. 3 is the infrared spectrogram of 3 replication soybean oil steams in embodiment 1, and 3 spectrum curves fit like a glove.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is absorbance (without unit).The wave number at infrared spectrogram peak is 3007.02cm
-1, 2931.80cm
-1, 2900.94cm
-1, 2854.65cm
-1, 2362.80cm
-1, 2343.51cm
-1, 1745.58cm
-1, 1463.97cm
-1, 1375.25cm
-1, 1236.37cm
-1, 1161.15cm
-1, 1118.71cm
-1, 1099.43cm
-1, 731.02cm
-1, 721.38cm
-1, 576.72cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Fig. 4 is the infrared spectrogram of measuring sunflower oil steam in embodiment 2 for 3 times, and 3 spectrum curves fit like a glove.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is absorbance (without unit).The wave number at infrared spectrogram peak is 3007.02cm
-1, 2933.73cm
-1, 2904.80cm
-1, 2856.58cm
-1, 2358.94cm
-1, 2341.58cm
-1, 1745.58cm
-1, 1463.97cm
-1, 1417.68cm
-1, 1377.17cm
-1, 1238.30cm
-1, 1163.08cm
-1, 1099.43cm
-1, 734.88cm
-1, 723.31cm
-1, 669.30cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Fig. 5 is the infrared spectrogram of measuring peanut oil steam in embodiment 3 for twice, measures spectrogram 2 times and fits like a glove.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is absorbance (without unit).The wave number at infrared spectrogram peak is 3005.10cm
-1, 2922.16cm
-1, 2858.51cm
-1, 2358.94cm
-1, 2341.58cm
-1, 1743.65cm
-1, 1163.08cm
-1, 1118.71cm
-1, 1101.35cm
-1, 1001.06cm
-1, 738.74cm
-1, 725.23cm
-1, 669.30cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Fig. 6 is the infrared spectrogram of measuring sesame oil steam in embodiment 4 for 3 times, measures spectrogram 3 times and fits like a glove.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is absorbance (without unit).The wave number at infrared spectrogram peak is 3007.02cm
-1, 2951.09cm
-1, 2906.73cm
-1, 2843.07cm
-1, 2638.62m
-1, 2358.94cm
-1, 2339.65cm
-1, 2270.22cm
-1, 1747.51cm
-1, 1469.76cm
-1, 1462.04cm
-1, 1367.53cm
-1, 1236.37cm
-1, 1161.15cm
-1, 1099.43cm
-1, 991.41cm
-1, 908.47cm
-1, 729.09cm
-1, 719.45cm
-1, 667.37cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Fig. 7 is the infrared spectrogram of measuring rapeseed oil steam in embodiment 5 for 3 times, measures spectrogram 3 times and fits like a glove.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is absorbance (without unit).The wave number at infrared spectrogram peak is 2920.23cm
-1, 2850.79cm
-1, 2358.94cm
-1, 1743.65cm
-1, 1651.07cm
-1, 1550.77cm
-1, 1514.12cm
-1, 1404.18cm
-1, 1010.70cm
-1, 752.24cm
-1, 661.58cm
-1, 509.21cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Fig. 8 is the infrared spectrogram of measuring cotton seed oil steam in embodiment 6 for 3 times, measures spectrogram 3 times and fits like a glove.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is absorbance (without unit).The wave number at infrared spectrogram peak is 3007.02cm
-1, 2924.09cm
-1, 2858.51cm
-1, 2360.87cm
-1, 2333.87cm
-1, 1743.65cm
-1, 1232.51cm
-1, 1161.15cm
-1, 1095.57cm
-1, 746.45cm
-1, 675.09cm
-1, 648.08cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Fig. 9 is the infrared spectrogram of measuring castor oil steam in embodiment 7 for 3 times, measures spectrogram 3 times and fits like a glove.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is absorbance (without unit).The wave number at infrared spectrogram peak is 2931.80cm
-1, 2908.65cm
-1, 2845.00cm
-1, 2358.94cm
-1, 2341.58cm
-1, 1471.69cm
-1, 1462.04cm
-1, 1361.74cm
-1, 966.34cm
-1, 729.09cm
-1, 719.45cm
-1, 669.30cm
-1, 650.01cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Figure 10 is the infrared spectrogram of implementing to measure for twice in 8 commodity soybean oil vapour, measures spectrogram twice and fits like a glove.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is absorbance (without unit).The wave number at infrared spectrogram peak is 3007.02cm
-1, 2956.87cm
-1, 2868.15cm
-1, 2360.87cm
-1, 2335.80cm
-1, 1745.58cm
-1, 1651.07cm
-1, 1558.48cm
-1, 1514.12cm
-1, 1450.47cm
-1, 1234.44cm
-1, 1159.22cm
-1, 1095.57cm
-1, 960.55cm
-1, 898.83cm
-1, 705.95cm
-1, 501.49cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Figure 11 is the infrared spectrogram of measuring commodity peanut oil steam in embodiment 9 for 3 times, measures spectrogram 3 times and fits like a glove.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is absorbance (without unit).The wave number at infrared spectrogram peak is 3007.02cm
-1, 2931.80cm
-1, 2908.65cm
-1, 2845.00cm
-1, 2358.94cm
-1, 2339.65cm
-1, 1745.58cm
-1, 1462.04cm
-1, 1377.17cm
-1, 1236.37cm
-1, 1161.15cm
-1, 1097.50cm
-1, 721.38cm
-1, 669.30cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Figure 12 is the infrared spectrogram of measuring commodity sunflower oil steam in embodiment 10 for 3 times, measures spectrogram 3 times and fits like a glove.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is absorbance (without unit).The wave number at infrared spectrogram peak is 2931.80cm
-1, 2908.65cm
-1, 2845.00cm
-1, 2357.01cm
-1, 2328.08cm
-1, 1747.51cm
-1, 1471.69cm
-1, 1462.04cm
-1, 1367.53cm
-1, 1161.15cm
-1, 908.47cm
-1, 729.09cm
-1, 719.45cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Figure 13 is the infrared spectrogram of measuring lard steam in embodiment 11 for 3 times, measures spectrogram 3 times and fits like a glove.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is absorbance (without unit).The wave number at infrared spectrogram peak is 3003.17cm
-1, 2941.44cm
-1, 2897.08cm
-1, 2852.72cm
-1, 1745.58cm
-1, 1647.21cm
-1, 1462.04cm
-1, 1369.46cm
-1, 1236.37cm
-1, 1163.08cm
-1, 723.31cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Figure 14 is the infrared spectrogram of measuring butter steam in embodiment 12 for 10 times, measures spectrogram 10 times and fits like a glove.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is absorbance (without unit).The wave number at infrared spectrogram peak is 2931.80cm
-1, 2910.58cm
-1, 2854.65cm
-1, 2845.00cm
-1, 1747.51cm
-1, 1463.97cm
-1, 1367.53cm
-1, 1238.30cm
-1, 1165.00cm
-1, 729.09cm
-1, 719.45cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Figure 15 is the infrared spectrogram of measuring sheep oil vapour in embodiment 13 for 3 times, measures spectrogram 3 times and fits like a glove.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is absorbance (without unit).The wave number at infrared spectrogram peak is 3469.94cm
-1, 2931.80cm
-1, 2908.65cm
-1, 2854.65cm
-1, 2845.00cm
-1, 2679.13cm
-1, 1749.44cm
-1, 1458.18cm
-1, 1419.61cm
-1, 1375.25cm
-1, 1236.37cm
-1, 1165.00cm
-1, 1116.78cm
-1, 966.34cm
-1, 721.38cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Figure 16. in prior art, the people such as Fan Lu measures the infrared spectrogram of the grease extracting from soybean, peanut, sesame, cottonseed and rice bran by detachable bromination sylvite window liquid cell method.Spectrogram horizontal ordinate is wave number (unit: cm
-1), ordinate is absorbance (without unit).In figure, 1 is that soybean oil, 2 is that peanut oil, 3 is that sesame oil, 4 is that rice bran oil, 5 is cottonseed oil.In spectrogram, the wave number at target infrared spectrogram peak is: 2855cm
-1, 1746cm
-1, 1163cm
-1, 1119cm
-1, 1099cm
-1, 723cm
-1.
Embodiment
Following non-limiting example can make the present invention of those of ordinary skill in the art's comprehend, but does not limit the present invention in any way.
In following examples, IRPrestige-21 Fourier transform infrared spectrometer used is that Japanese Shimadzu company produces, and measures wavelength coverage 4000-400cm
-1, resolution 4cm
-1.
Oil samples used in embodiment 1-7 is for extracting and obtain with the described oil samples raw material of following table 1.
The table 1 oil samples places of origin of raw materials
Soybean, sunflower seeds, peanut, rapeseed, sesame, 30-60 ℃ of sherwood oil for cottonseed, castor-oil plant is extracted with 60-90 ℃ of sherwood oil.
In embodiment 8-10, used oil sample is soybean oil, peanut oil, the sunflower oil that is purchased from supermarket.Commodity edible vegetable oil kind and processing mode are in table 2.
Table 2 sample type and processing mode
Embodiment 11-13 used oil sample is lard, butter and the sheep oil extracting from pork, beef and mutton.In the time using animal oil to carry out sample preparation, if animal oil solidifies, should melt at a lower temperature, then sample.
(1) extraction of vegetable oil: take 10g and pulverized dry soybean in apparatus,Soxhlet's, add 180mL, 30-60 ℃ of sherwood oil, backflow 6h, extract rotary evaporation, to solvent-free, obtains soybean oil, is then placed in 70 ℃ of water-bath 2h.
(2) polyethylene film pouch is put into IR light path buckle back scape.
Tygon is because its molecule is simple, and its infrared spectrum should be simple, and as shown in Figure 1, the wave number at infrared spectrogram peak is 2916.37cm to the polyethylene film pouch infrared spectrogram recording
-1, 2848.86cm
-1, 2638.62cm
-1, 2360.87cm
-1, 2335.80cm
-1, 1465.90cm
-1, 1369.46cm
-1, 1305.81cm
-1, 723.31cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.And the infrared spectrogram scanning after polyethylene film bag buckle back scape as shown in Figure 2, the wave number at infrared spectrogram peak is 2929.87cm
-1, 2846.93cm
-1, two peaks are very weak, and transmittance is more than 94%, and concrete peak intensity and peak shape are as the criterion with spectrogram.
(3) get the bottom that the prepared soybean oil oil samples of appropriate above-mentioned steps (1) packs bag into, seal sack, in 80 ℃ of baking ovens, heat 1h, take out, put into infrared spectrometer light path and detect.
Embodiment 2-6
Embodiment 7
The soybean oil steam infrared spectrum that embodiment 1 detects as shown in Figure 3, is measured spectrogram 3 times and is fitted like a glove.The wave number at infrared spectrogram peak is 3007.02cm
-1, 2931.80cm
-1, 2900.94cm
-1, 2854.65cm
-1, 2362.80cm
-1, 2343.51cm
-1, 1745.58cm
-1, 1463.97cm
-1, 1375.25cm
-1, 1236.37cm
-1, 1161.15cm
-1, 1118.71cm
-1, 1099.43cm
-1, 731.02cm
-1, 721.38cm
-1, 576.72cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
The infrared spectrogram of the sunflower oil steam that embodiment 2 detects as shown in Figure 4, is measured spectrogram 3 times and is fitted like a glove.The wave number at infrared spectrogram peak is 3007.02cm
-1, 2933.73cm
-1, 2904.80cm
-1, 2856.58cm
-1, 2358.94cm
-1, 2341.58cm
-1, 1745.58cm
-1, 1463.97cm
-1, 1417.68cm
-1, 1377.17cm
-1, 1238.30cm
-1, 1163.08cm
-1, 1099.43cm
-1, 734.88cm
-1, 723.31cm
-1, 669.30cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
The infrared spectrogram of the peanut oil steam that embodiment 3 detects as shown in Figure 5, is measured spectrogram 2 times and is fitted like a glove.The wave number at infrared spectrogram peak is 3005.10cm
-1, 2922.16cm
-1, 2858.51cm
-1, 2358.94cm
-1, 2341.58cm
-1, 1743.65cm
-1, 1163.08cm
-1, 1118.71cm
-1, 1101.35cm
-1, 1001.06cm
-1, 738.74cm
-1, 725.23cm
-1, 669.30cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
The infrared spectrogram that the sesame oil steam that embodiment 4 detects is measured as shown in Figure 6, is measured spectrogram 3 times and is fitted like a glove.The wave number at infrared spectrogram peak is 3007.02cm
-1, 2951.09cm
-1, 2906.73cm
-1, 2843.07cm
-1, 2638.62m
-1, 2358.94cm
-1, 2339.65cm
-1, 2270.22cm
-1, 1747.51cm
-1, 1469.76cm
-1, 1462.04cm
-1, 1367.53cm
-1, 1236.37cm
-1, 1161.15cm
-1, 1099.43cm
-1, 991.41cm
-1, 908.47cm
-1, 729.09cm
-1, 719.45cm
-1, 667.37cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
The infrared spectrogram that the rapeseed oil steam that embodiment 5 detects is measured as shown in Figure 7, is measured spectrogram 3 times and is fitted like a glove.The wave number at infrared spectrogram peak is 2920.23cm
-1, 2850.79cm
-1, 2358.94cm
-1, 1743.65cm
-1, 1651.07cm
-1, 1550.77cm
-1, 1514.12cm
-1, 1404.18cm
-1, 1010.70cm
-1, 752.24cm
-1, 661.58cm
-1, 509.21cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
The infrared spectrogram that the cotton seed oil steam that embodiment 6 detects is measured as shown in Figure 8, is measured spectrogram 3 times and is fitted like a glove.The wave number at infrared spectrogram peak is 3007.02cm
-1, 2924.09cm
-1, 2858.51cm
-1, 2360.87cm
-1, 2333.87cm
-1, 1743.65cm
-1, 1232.51cm
-1, 1161.15cm
-1, 1095.57cm
-1, 746.45cm
-1, 675.09cm
-1, 648.08cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
The infrared spectrogram that the castor oil steam that embodiment 7 detects is measured as shown in Figure 9, is measured spectrogram 3 times and is fitted like a glove.The wave number at infrared spectrogram peak is 2931.80cm
-1, 2908.65cm
-1, 2845.00cm
-1, 2358.94cm
-1, 2341.58cm
-1, 1471.69cm
-1, 1462.04cm
-1, 1361.74cm
-1, 966.34cm
-1, 729.09cm
-1, 719.45cm
-1, 669.30cm
-1, 650.01cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Embodiment 8
(1) polyethylene film bag is put into light path buckle back scape.
(2) get the bottom that the soybean oil sample that is purchased from right amount supermarket packs bag into, seal sack, in 80 ℃ of baking ovens, heat 1h, take out, put into infrared spectrometer light path and detect.
Embodiment 9-10
Complete embodiment 8 according to described step, but in embodiment 9,10, pack the peanut seed oil, the sunflower oil that are purchased from supermarket of being respectively of bag bottom into.
The infrared spectrogram of the commodity soybean oil vapour that embodiment 8 surveys as shown in figure 10, is measured spectrogram 2 times and is fitted like a glove.The wave number at infrared spectrogram peak is 3007.02cm
-1, 2956.87cm
-1, 2868.15cm
-1, 2360.87cm
-1, 2335.80cm
-1, 1745.58cm
-1, 1651.07cm
-1, 1558.48cm
-1, 1514.12cm
-1, 1450.47cm
-1, 1234.44cm
-1, 1159.22cm
-1, 1095.57cm
-1, 960.55cm
-1, 898.83cm
-1, 705.95cm
-1, 501.49cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
The infrared spectrogram of the commodity peanut oil steam that embodiment 9 surveys as shown in figure 11, is measured spectrogram 3 times and is fitted like a glove.The wave number at infrared spectrogram peak is 3007.02cm
-1, 2931.80cm
-1, 2908.65cm
-1, 2845.00cm
-1, 2358.94cm
-1, 2339.65cm
-1, 1745.58cm
-1, 1462.04cm
-1, 1377.17cm
-1, 1236.37cm
-1, 1161.15cm
-1, 1097.50cm
-1, 721.38cm
-1, 669.30cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
The infrared spectrogram of the commodity sunflower oil steam that embodiment 10 surveys as shown in figure 12, is measured spectrogram 3 times and is fitted like a glove.The wave number at infrared spectrogram peak is 2931.80cm
-1, 2908.65cm
-1, 2845.00cm
-1, 2357.01cm
-1, 2328.08cm
-1, 1747.51cm
-1, 1471.69cm
-1, 1462.04cm
-1, 1367.53cm-
1, 1161.15cm
-1, 908.47cm
-1, 729.09cm
-1, 719.45cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Embodiment 11
According to the infrared spectrogram of the identical step measurements lard steam of embodiment 1, as shown in figure 13, measure spectrogram 3 times and fit like a glove.The wave number at infrared spectrogram peak is 3003.17cm
-1, 2941.44cm
-1, 2897.08cm
-1, 2852.72cm
-1, 1745.58cm
-1, 1647.21cm
-1, 1462.04cm
-1, 1369.46cm
-1, 1236.37cm
-1, 1163.08cm
-1, 723.31cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Embodiment 12
According to the infrared spectrogram of the identical step measurements butter steam of embodiment 1, as shown in figure 14, measure spectrogram 10 times and fit like a glove.The wave number at infrared spectrogram peak is 2931.80cm
-1, 2910.58cm
-1, 2854.65cm
-1, 2845.00cm
-1, 1747.51cm
-1, 1463.97cm
-1, 1367.53cm
-1, 1238.30cm
-1, 1165.00cm
-1, 729.09cm
-1, 719.45cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Embodiment 13
According to the infrared spectrogram of the identical step measurements sheep oil vapour of embodiment 1, as shown in figure 15, measure spectrogram 3 times and fit like a glove.The wave number at infrared spectrogram peak is 3469.94cm
-1, 2931.80cm
-1, 2908.65cm
-1, 2854.65cm
-1, 2845.00cm
-1, 2679.13cm
-1, 1749.44cm
-1, 1458.18cm
-1, 1419.61cm
-1, 1375.25cm
-1, 1236.37cm
-1, 1165.00cm
-1, 1116.78cm
-1, 966.34cm
-1, 721.38cm
-1, concrete peak intensity and peak shape are as the criterion with spectrogram.
Not about the report of vegetable oil and the detection of animal oil steam, data are difficult contrast at present.Existing IR gas cell, because the reason of its structure can not be used for the detection of the vegetable oil arriving involved in the present invention and animal oil steam, so without confirmatory experiment, but the spectrogram that available spectrogram of the present invention and KBr pressed disc method obtain contrast.
The people such as model fine jade, Wang Meimei, Yang Hongwei are at " analytical chemistry " 2007, the detachable KBr salt window liquid cell method of " Fourier transform infrared spectrum is identified the research of five vegetable oil " literary composition of delivering in Vol.35No.3 has been measured from the infrared spectrogram of the grease of soybean and Extraction of Peanut, as shown in figure 16, in figure, target soybean oil and peanut oil wave number have gained spectrogram: 2855cm
-1, 1746cm
-1, 1163cm
-1, 1119cm
-1, 1099cm
-1, 723cm
-1.Compared with the infrared spectrum of the liquid soybean oil that the infrared spectrum of the soybean oil steam that the present invention detects detects with KBr pressed disc method: concrete wave number 2855cm
-1, 1746cm
-1, 1161cm
-1, 1119cm
-1, 1099cm
-1, 721cm
-1(for convenience of contrast, only list the wave number corresponding with Figure 16, and round numbers), wave number is substantially in full accord, just 1163cm
-1differ 2cm
-1, 723cm
-1differ 2cm
-1, differ from wave number all at the resolution 4cm of instrument
-1in scope; Compared with the infrared spectrum of the liquid peanut oil that the infrared spectrum of the peanut oil steam that the present invention detects detects with KBr pressed disc method: concrete wave number 2859cm
-1, 1744cm
-1, 1163cm
-1, 1119cm
-1, 1101cm
-1, 725cm
-1(for convenience of contrast, only list the wave number corresponding with Figure 16, and round numbers), wave number is substantially in full accord, just 2855cm
-1differ 4cm
-1, 1746cm
-1, 1099cm
-1and 723cm
-1all differ 2cm
-1, differ from wave number all at the resolution 4cm of instrument
-1in scope.
Therefore, detected the contrast of polyethylene film and KBr pressed disc method by the IR of vegetable oil and animal oil, the reliability that known polyethylene film detects, is verified.
Claims (3)
1. the detection method based on Infrared spectroscopy oil vapour, is characterized in that: detect as the mounting medium of oil vapour sample using polyethylene film.
2. the detection method based on Infrared spectroscopy oil vapour according to claim 1, is characterized in that described polyethylene film should meet one of following two conditions:
1. with in the infrared spectrogram after the pouch buckle back scape of being made by polyethylene film, at 4000cm
-1to 400cm
-1scope is interior without absorption peak;
2. with in the infrared spectrogram after the pouch buckle back scape of being made by polyethylene film, at 4000cm
-1to 400cm
-1in scope, only at 2930cm
-1to 2845cm
-1between have two absorption peaks, and light transmittance values>=94.0%.
3. the detection method based on Infrared spectroscopy oil vapour according to claim 1, is characterized in that adopting following steps to detect:
1. make pouch with polyethylene film, pouch is put into IR light path buckle back scape;
2. pack liquid oils sample in the bottom of polyethylene film pouch and seal sack, be heated to oil vapour and be full of pouch top, put into infrared light path and detect.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763647A (en) * | 2019-11-20 | 2020-02-07 | 蚌埠中光电科技有限公司 | Method for determining partition paper extract by using infrared spectroscopy |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000298095A (en) * | 1999-04-14 | 2000-10-24 | Nippon Sanso Corp | Spectroscopic analysis method and apparatus of gas |
| US20020140931A1 (en) * | 2001-02-20 | 2002-10-03 | Robertson Charles William | Liquid photometer using surface tension to contain sample |
| US20090242770A1 (en) * | 2008-03-26 | 2009-10-01 | Jasco Corporation | Automatic And Continuous Quantitative Analysis Method And Apparatus For Multiple Components |
| CN102809546A (en) * | 2012-08-21 | 2012-12-05 | 南京埃森环境技术有限公司 | Low-concentration flue gas infra-red analyzer and detection method |
| JP2013096889A (en) * | 2011-11-02 | 2013-05-20 | Fuji Electric Co Ltd | Infrared gas analyzer |
| CN103207159A (en) * | 2012-01-12 | 2013-07-17 | 筵丽萍 | Near-infrared spectral measure system and method thereof |
-
2014
- 2014-03-12 CN CN201410090458.0A patent/CN103837490A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000298095A (en) * | 1999-04-14 | 2000-10-24 | Nippon Sanso Corp | Spectroscopic analysis method and apparatus of gas |
| US20020140931A1 (en) * | 2001-02-20 | 2002-10-03 | Robertson Charles William | Liquid photometer using surface tension to contain sample |
| US20090242770A1 (en) * | 2008-03-26 | 2009-10-01 | Jasco Corporation | Automatic And Continuous Quantitative Analysis Method And Apparatus For Multiple Components |
| JP2013096889A (en) * | 2011-11-02 | 2013-05-20 | Fuji Electric Co Ltd | Infrared gas analyzer |
| CN103207159A (en) * | 2012-01-12 | 2013-07-17 | 筵丽萍 | Near-infrared spectral measure system and method thereof |
| CN102809546A (en) * | 2012-08-21 | 2012-12-05 | 南京埃森环境技术有限公司 | Low-concentration flue gas infra-red analyzer and detection method |
Non-Patent Citations (2)
| Title |
|---|
| 曹晔 等: "基于非分散红外光谱原理的火箭煤油蒸汽检测仪的设计", 《导弹与航天运载技术》 * |
| 郑燕龙 等: "气体样品的制备技术", 《实验室玻璃仪器手册》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763647A (en) * | 2019-11-20 | 2020-02-07 | 蚌埠中光电科技有限公司 | Method for determining partition paper extract by using infrared spectroscopy |
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