Mass spectrum monitoring method for detecting flavor substances in essence microcapsules

Abstract

The invention discloses a mass spectrum monitoring method for detecting flavor substances in essence microcapsules. A device used in the monitoring method comprises a glove box, a switch valve and a time-of-flight mass spectrometer. The specific monitoring process is as follows: the dry fabric containing the essence microcapsules is placed in the glove box, two hands of an operator stretch into the glove box through glove inlets, the dry fabric is kneaded to enable the essence microcapsules in the dry fabric to be broken to release fragrant substances, and meanwhile, a switch valve is opened to start the operation; and the fragrant substances are volatilized to enter the sample gas conveying pipeline and enter the time-of-flight mass spectrometer through a sample inlet of the time-of-flight mass spectrometer for detection. According to the method, the release process of the flavor substances in the essence microcapsules due to friction can be monitored on line, and meanwhile, the flavor substances generated by different microcapsules can be distinguished. The method has the characteristics of high detection speed and high sensitivity.

Description

Technical Field

[0001] The invention is mainly used for online monitoring of the release of aroma substances caused by the rupture of flavor microcapsules due to friction. Specifically, the release process of aroma substances caused by friction is monitored online in real time using a time-of-flight mass spectrometer, and aroma substances produced by different flavor microcapsules can be distinguished. It has the characteristics of fast detection speed and high sensitivity. Background Art

[0002] Time-of-flight mass spectrometer has the advantages of fast analysis speed, few fragment ions, and easy spectrum identification. It does not require complicated sample pretreatment process and is widely used in the rapid detection of VOCs, SVOCs and chemical reagents in the environment. The on-site continuous sampling method combined with the mass correction and quantitative calibration system set inside the instrument can achieve accurate qualitative and quantitative analysis requirements of samples. There are many kinds of flavor substances, which are widely used in food, medicine, cosmetics and other industries. The quality of flavors can directly reflect the quality and comfort of products.

[0003] By using a time-of-flight mass spectrometer and direct sampling, a simple, fast and accurate method for identifying aroma components was established. This method was used to study the online monitoring process of aroma release caused by the rupture of fragrance microcapsules due to friction. It can distinguish cleaning products with different scents and brands, as well as the differences in the amount and duration of aroma release, etc.

[0004] The invention is mainly used for online monitoring of the release of aroma substances caused by the rupture of microcapsules due to friction. Specifically, the release process of aroma substances caused by friction is monitored online in real time using a time-of-flight mass spectrometer, and aroma substances produced by different microcapsules can be distinguished. It has the characteristics of fast detection speed and high sensitivity. Summary of the invention

[0005] The present invention mainly provides a mass spectrometry monitoring method for detecting aroma substances in the broken flavor microcapsules, using a time-of-flight mass spectrometer to monitor the release process of aroma substances generated by the rupture of flavor microcapsules due to friction in real time. The technical scheme adopted is as follows:

[0006] A mass spectrometry monitoring method for detecting aroma substances in essence microcapsules, wherein the device used in the monitoring method comprises a glove box, a switch valve and a time-of-flight mass spectrometer;

[0007] The glove box is a hollow cavity with two glove inlets on one side of the glove box and a through hole A on the other side of the glove box. One end of a sample gas delivery pipeline extends into the glove box through the through hole A, and the other end is connected to the sample inlet of the time-of-flight mass spectrometer. A switch valve is provided on the sample gas delivery pipeline.

[0008] The specific monitoring process is as follows: dry fabric containing fragrance microcapsules is placed in a glove box, the operator puts both hands into the glove box through the glove inlet, rubs the dry fabric to rupture the fragrance microcapsules in the dry fabric to release the fragrance substances, and at the same time opens the switch valve, the fragrance substances evaporate into the sample gas delivery pipeline and enter the time-of-flight mass spectrometer through the sample inlet of the time-of-flight mass spectrometer for detection.

[0009] During the test, the distance between the dry fabric and the opening of the sample gas delivery pipeline inside the glove box is ≤1cm. Dry fabric refers to cotton products such as clothes and cleaning cloths that have been washed and dried by cleaning products.

[0010] Furthermore, the cleaning products are cleaning agents, daily cleaning products, etc. containing fragrance microcapsules, such as laundry detergent, shower gel, shampoo, kitchen detergent, pet cleaning liquid, etc.

[0011] Furthermore, the aroma substances in the flavor microcapsules are flavor substances that constitute the flavor, such as citral, limonene, nerol, eugenol, eugenol, ionone, phenylethyl alcohol, menthol, eugenol, etc., which can be used as flavor substances in cleaning products.

[0012] Furthermore, the rubbing during the detection process is to bring any two different parts of the dry fabric to be tested into close contact and move back and forth to generate sliding friction, and the friction process causes the fragrance microcapsules in the dry fabric to rupture, thereby releasing the fragrance substances.

[0013] The time-of-flight mass spectrometer uses a vacuum ultraviolet lamp as the ionization source. After the aroma substances are ionized, they are transmitted to the mass analyzer through the quadrupole and finally detected. The mass spectrometer works in continuous monitoring mode and can track the release process of aroma substances caused by the rupture of the flavor microcapsules due to friction in real time.

[0014] This method can analyze the aroma substances produced by different cleaning products during the friction process and has the advantages of simple structure, high sensitivity and fast response speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the device used for the mass spectrometry monitoring method for detecting aroma substances in fragrance microcapsules; 1—glove box, 2—drying fabric, 3—switch valve, 4—time-of-flight mass spectrometer.

[0016] Figure 2 This is a graph showing the results of monitoring the limonene content in the laundry detergent containing the limonene fragrance microcapsules in Example 1. DETAILED DESCRIPTION

[0017] The present invention provides a mass spectrometry monitoring method for detecting the release of fragrance substances in fragrance microcapsules, such as Figure 1As shown, the device used in the monitoring method includes a glove box 1, a switch valve 3 and a time-of-flight mass spectrometer 4. The glove box 1 is a hollow cavity. Two glove inlets are provided on one side wall of the glove box 1. A through hole A is opened on the other side wall of the glove box 1. One end of a sample gas delivery pipeline passes through the through hole A and extends into the interior of the glove box 1, and the other end is connected to the sample inlet of the time-of-flight mass spectrometer 4. The switch valve 3 is provided on the sample gas delivery pipeline.

[0018] The specific monitoring process is as follows: a dry fabric 2 containing fragrance microcapsules is placed in a glove box 1, the operator extends both hands into the glove box 1 through the glove inlet, picks up the dry fabric 2 with both hands, and places the dry fabric 2 at a distance of ≤1 cm from the opening of the sample gas delivery pipeline, rubs the dry fabric 2 to rupture the fragrance microcapsules in the dry fabric 2 to release fragrance substances, and at the same time opens the switch valve 3, and the fragrance substances enter the time-of-flight mass spectrometer 4 through the sample gas delivery pipeline and the sample inlet of the time-of-flight mass spectrometer 4 for detection.

[0019] The time-of-flight mass spectrometer 4 uses a vacuum ultraviolet lamp as an ionization source. After the aroma substances are ionized, they are transmitted to the mass analyzer through the quadrupole and finally detected. The mass spectrometer works in a continuous monitoring mode and can track in real time the release process of the aroma substances caused by the rupture of the microcapsules due to friction.

[0020] The dry fabric 2 is cotton products such as clothes, cleaning cloths, etc. that have been washed and dried with a cleaning product containing essence microcapsules.

[0021] Example 1

[0022] A 30x30cm cotton test cloth was washed with laundry detergent (limonene content of 10%) containing fragrance microcapsules of limonene fragrance (mass-to-charge ratio m / z 136) and then dried. The washed and dried test cloth was placed in a glove box. The operator reached into the glove box with both hands through the glove inlet, picked up the test cloth with both hands and placed the test cloth 0.5cm away from the opening of the sample gas delivery pipeline, opened the switch valve on the sample gas delivery pipeline, and rubbed the test cloth with both hands to break the fragrance microcapsules in the test cloth to release the fragrance substance limonene. The rubbing was continued for 2 minutes. The limonene entered the time-of-flight mass spectrometer through the sample gas delivery pipeline and the sample inlet of the time-of-flight mass spectrometer. After ionization in the mass spectrometer, the limonene was transmitted to the mass analyzer through the quadrupole and continuously monitored for 2 minutes. The results are as follows: Figure 2 shown.

Claims

1. A mass spectrometry monitoring method for detecting aroma substances in essence microcapsules, characterized in that: The device used in the monitoring method comprises a glove box (1), a drying fabric (2), a switch valve (3) and a time-of-flight mass spectrometer (4); The glove box (1) is a hollow cavity. Two glove inlets are arranged on one side wall of the glove box (1). A through hole A is opened on the other side wall of the glove box (1). One end of a sample gas delivery pipeline passes through the through hole A and extends into the interior of the glove box (1). The other end is connected to a sample inlet of a time-of-flight mass spectrometer (4). A switch valve (3) is arranged on the sample gas delivery pipeline. The specific monitoring process is as follows: a dry fabric (2) containing fragrance microcapsules is placed in a glove box (1), an operator inserts both hands into the glove box through the glove inlet, rubs the dry fabric (2) to rupture the fragrance microcapsules in the dry fabric (2) and release fragrance substances, and at the same time opens a switch valve (3), the fragrance substances volatilize into a sample gas delivery pipeline and enter the time-of-flight mass spectrometer (4) through the sample inlet of the time-of-flight mass spectrometer (4) for detection.

2. The mass spectrometry monitoring method according to claim 1, characterized in that: During the detection process, the distance between the dry fabric (2) and the opening of the sample gas delivery pipeline inside the glove box (1) is ≤1 cm.

3. The mass spectrometry monitoring method according to claim 1, characterized in that: The drying fabric (2) is cotton products such as clothes, cleaning cloths, etc. that have been washed and dried by a cleaning product.

4. The mass spectrometry monitoring method according to claim 3, characterized in that: The cleaning products are cleaning and washing products containing essence microcapsules.

5. The mass spectrometry monitoring method according to claim 1, characterized in that: The time-of-flight mass spectrometer (4) uses a vacuum ultraviolet lamp as an ionization source. After the aroma substances are ionized, they are transmitted to the mass analyzer through the quadrupole and finally detected. The mass spectrometer works in a continuous monitoring mode and can track in real time the release process of the aroma substances caused by the rupture of the microcapsules due to friction.

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