CN112414815A - Gasoline induction period capacity verification sample, preparation method and application - Google Patents
Gasoline induction period capacity verification sample, preparation method and application Download PDFInfo
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- CN112414815A CN112414815A CN202011364100.4A CN202011364100A CN112414815A CN 112414815 A CN112414815 A CN 112414815A CN 202011364100 A CN202011364100 A CN 202011364100A CN 112414815 A CN112414815 A CN 112414815A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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Abstract
The invention is suitable for the field of gasoline detection capability verification, and provides a capability verification sample of a gasoline induction period, a preparation method and application thereof, wherein the capability verification sample comprises a component A and a component B; the component A is a blank gasoline sample; the component B is cyclohexene; the volume ratio of the component A to the component B is (5-9) to (1-5). The embodiment of the invention adopts stable finished gasoline as the component A and stable cyclohexene as the component B, and the two components are packaged separately and have good relative stability; before detection, the component A and the component B are only required to be prepared into a capability verification sample according to a certain proportion. The technical scheme provided by the invention can prepare the gasoline induction period detection sample with the induction period of 300-600 minutes as required, and simultaneously ensures the uniformity and stability of the sample.
Description
Technical Field
The invention belongs to the field of gasoline detection capability verification, and particularly relates to a capability verification sample of a gasoline induction period, a preparation method and application.
Background
And the ability verification means that the ability of the participants is evaluated according to a preset criterion by using comparison among laboratories. Generally speaking, the organizer uniformly issues samples with consistent uniformity and stability meeting requirements to the laboratories participating in comparison, the participants perform detection, and then the organizer counts the results reported by the participants to evaluate the abilities of the participants. The capability verification sample refers to a sample used for capability verification. The capability verification sample is important and is the key to success or failure of capability verification. And the sample can be successfully obtained by ensuring that the uniformity and the stability of the sample meet the requirements. In addition, the induction period of the gasoline refers to the tendency of the gasoline for vehicles to generate colloid during storage, and reflects the oxidation stability of the gasoline; the longer the induction period, the better the oxidation stability.
GB 17930-2016 (gasoline for cars) stipulates that the induction period of gasoline is qualified within 480 minutes, and some trade consignees control the gasoline consignee standard to be that the induction period is not less than 600 minutes. In fact, the induction period of normal finished gasoline for automobiles is more than 800 minutes, the relative stability of the sample meets the requirement of capability verification, but the induction period is too long to provide effective evaluation and proof for the technical level of participant induction period project detection. If the intermediate product (catalytic cracking fraction) of a refinery is used as a sample, the induction period may be less than 480 minutes, but the intermediate product contains a large amount of unstable components, has poor stability, and cannot meet the capability verification stability requirement.
In view of the above two situations, it is difficult to directly obtain a usable capacity verification sample, and the induction period of a suitable sample is preferably 300 minutes to 600 minutes according to the requirement of capacity verification. Specifically, if the sample prepared by the prior art takes the commercially available finished gasoline as the capability verification sample, the participant report result generally indicates that the induction period is greater than 800 minutes or even greater than 1000 minutes, and the technical level of the participant cannot be truly reflected; if the intermediate products (catalytic gasoline, coker gasoline, etc.) of the refinery are taken as the capability verification samples, the influence of inconsistent detection time of participants, storage temperature in the transportation process and after arriving at a laboratory, and the like on the samples during the implementation period of the capability verification plan cannot be guaranteed, so that the influence of the sample stability possibly failing to meet the capability verification is caused. In addition, the intermediate products (catalytic gasoline, coker gasoline, etc.) obtained from refineries, which generally exceed 20 liters, are subject to refinery safety regulatory restrictions and are difficult to obtain.
Disclosure of Invention
The embodiment of the invention aims to provide a sample for verifying the capacity of a gasoline induction period, and aims to solve the problems in the background art.
The embodiment of the invention is realized by that a sample for verifying the capacity of a gasoline induction period comprises a component A and a component B; the component A is a blank gasoline sample; the component B is cyclohexene; the volume ratio of the component A to the component B is (5-9) to (5-1).
As a preferable scheme of the embodiment of the invention, the volume ratio of the component A to the component B is (6-8) to (4-2).
As another preferable scheme of the embodiment of the invention, the volume ratio of the component A to the component B is (6.5-7.5): (3.5-2.5).
As another preferable mode of the embodiment of the present invention, the blank gasoline sample is motor gasoline.
Another objective of an embodiment of the present invention is to provide a method for preparing the above capability verification sample, which includes the following steps:
measuring a blank gasoline sample as the component A and measuring cyclohexene as the component B according to the volume ratio of the component A to the component B;
and (3) independently packaging the measured component B and the component A, and adding the measured component B into the component A for mixing before detection to obtain the capacity verification sample.
Another object of the embodiments of the present invention is to provide a sample for capability verification prepared by the above preparation method.
As another preferable scheme of the embodiment of the invention, the induction period of the capacity verification sample is (360-600) minutes.
Another object of the embodiments of the present invention is to provide a use of the above capability verification sample in capability verification of gasoline induction period.
According to the capacity verification sample for the induction period of the gasoline, provided by the embodiment of the invention, stable finished gasoline is adopted as the component A, stable cyclohexene is adopted as the component B, and the two components are packaged independently and have good relative stability; before detection, the component A and the component B are only required to be prepared into a capability verification sample according to a certain proportion. The technical scheme provided by the invention can prepare the gasoline induction period detection sample with the induction period of 300-600 minutes as required, and simultaneously ensures the uniformity and stability of the sample. In addition, the finished gasoline is purchased from a gas station, and the cyclohexene component can be directly purchased from a chemical agent store and is easily obtained. In summary, compared with the prior art, the invention has the following advantages:
1. by changing the volume ratio of the component B (cyclohexene), the induction period of the sample is controllable within 300-600 minutes, the technical level of item detection in the induction period of a participant can be better reflected, and the capability verification is more practical;
2. the sample has good uniformity and stability, and can meet the requirement of capability verification;
3. the method has the advantages of convenient raw material sample purchase, convenient operation and easy realization.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment provides a sample for verifying the capacity of a gasoline induction period, and the preparation method comprises the following steps:
s1, selection and preparation of a blank gasoline sample:
1. selecting and cleaning a blank gasoline sampling barrel. Selecting a commercial 30-liter iron barrel, respectively cleaning with absolute ethyl alcohol and petroleum ether, airing, and keeping for later use, wherein metal scraps such as iron, copper and the like are prevented from being polluted in the period.
2. The blank gasoline sample can be selected from commercially available finished automobile gasoline (VIA), a sample is taken from an oil gun, enough samples are obtained at one time, and laboratory detection is carried out to verify whether the samples meet the requirements.
S2, taking the blank gasoline sample, manually stirring and homogenizing in a stainless steel sample mixing barrel for about 15 minutes, standing for about 5 minutes, subpackaging into 250 mL brown glass bottles in a manner of measuring cylinder amount of 160 mL, and tightly covering; recording the sample amount of each bottle, numbering according to the subpackaging sequence, and marking as a component A; the prepared component A should be protected from light and stored at normal temperature.
S3, purchasing a cyclohexene reagent (the purity is more than or equal to 98.0 percent), subpackaging the cyclohexene reagent into a 100 mL brown glass bottle in a manner of measuring cylinder volume of 40 mL, and tightly covering the bottle; recording the sample amount of each bottle, numbering according to the subpackaging sequence, and marking as a component B; the prepared sample should be protected from light and stored at normal temperature.
S4, when in use, pouring 40 mL of the component B into an original bottle containing 160 mL of the component A, manually shaking for 5 minutes to obtain a capacity verification sample, and then carrying out an induction period test.
Example 2
The embodiment provides a sample for verifying the capacity of a gasoline induction period, and the preparation method comprises the following steps:
s1, selection and preparation of a blank gasoline sample:
1. selecting and cleaning a blank gasoline sampling barrel. Selecting a commercial 30-liter iron barrel, respectively cleaning with absolute ethyl alcohol and petroleum ether, airing, and keeping for later use, wherein metal scraps such as iron, copper and the like are prevented from being polluted in the period.
2. The blank gasoline sample can be selected from commercially available finished automobile gasoline (VIA), a sample is taken from an oil gun, enough samples are obtained at one time, and laboratory detection is carried out to verify whether the samples meet the requirements.
S2, taking the blank gasoline sample, manually stirring and homogenizing in a stainless steel sample mixing barrel for about 15 minutes, standing for about 5 minutes, subpackaging into 250 mL brown glass bottles in a manner of measuring 120 mL in cylinder, and tightly covering; recording the sample amount of each bottle, numbering according to the subpackaging sequence, and marking as a component A; the prepared component A should be protected from light and stored at normal temperature.
S3, purchasing a cyclohexene reagent (the purity is more than or equal to 98.0%), subpackaging the cyclohexene reagent into a 100 mL brown glass bottle in a manner of measuring 80 mL volume, and tightly covering the bottle; recording the sample amount of each bottle, numbering according to the subpackaging sequence, and marking as a component B; the prepared sample should be protected from light and stored at normal temperature.
S4, when in use, pouring all 80 mL of the component B into an original bottle containing 120 mL of the component A, manually shaking for 5 minutes to obtain a capacity verification sample, and then carrying out an induction period test.
Example 3
The embodiment provides a sample for verifying the capacity of a gasoline induction period, and the preparation method comprises the following steps:
s1, selection and preparation of a blank gasoline sample:
1. selecting and cleaning a blank gasoline sampling barrel. Selecting a commercial 30-liter iron barrel, respectively cleaning with absolute ethyl alcohol and petroleum ether, airing, and keeping for later use, wherein metal scraps such as iron, copper and the like are prevented from being polluted in the period.
2. The blank gasoline sample can be selected from commercially available finished automobile gasoline (VIA), a sample is taken from an oil gun, enough samples are obtained at one time, and laboratory detection is carried out to verify whether the samples meet the requirements.
S2, manually stirring and homogenizing the blank gasoline sample in a stainless steel sample mixing barrel for about 15 minutes, standing for about 5 minutes, subpackaging the blank gasoline sample in a 250 ml brown glass bottle in a measuring cylinder volume mode, and tightly covering the bottle; recording the sample amount of each bottle, numbering according to the subpackaging sequence, and marking as a component A; the prepared component A should be protected from light and stored at normal temperature.
S3, purchasing a cyclohexene reagent (the purity is more than or equal to 98.0 percent), subpackaging the cyclohexene reagent into a 100 ml brown glass bottle in a measuring cylinder volume mode, and tightly covering the bottle; recording the sample amount of each bottle, numbering according to the subpackaging sequence, and marking as a component B; the prepared sample should be protected from light and stored at normal temperature.
S4, when in use, 70 mL of the component B is poured into an original bottle containing 130 mL of the component A, and after shaking for 5 minutes manually, a capacity verification sample is obtained, namely, an induction period test can be carried out.
Example 4
The embodiment provides a sample for verifying the capacity of a gasoline induction period, and the preparation method comprises the following steps:
s1, selection and preparation of a blank gasoline sample:
1. selecting and cleaning a blank gasoline sampling barrel. Selecting a commercial 30-liter iron barrel, respectively cleaning with absolute ethyl alcohol and petroleum ether, airing, and keeping for later use, wherein metal scraps such as iron, copper and the like are prevented from being polluted in the period.
2. The blank gasoline sample can be selected from commercially available finished product gasoline (VI) for vehicles, a sample is taken from a fuel gun, enough samples are obtained at one time, and laboratory detection is carried out to verify whether the samples meet the requirements.
S2, manually stirring and homogenizing the blank gasoline sample in a stainless steel sample mixing barrel for about 15 minutes, standing for about 5 minutes, subpackaging the blank gasoline sample in a 250 ml brown glass bottle in a measuring cylinder volume mode, and tightly covering the bottle; recording the sample amount of each bottle, numbering according to the subpackaging sequence, and marking as a component A; the prepared component A should be protected from light and stored at normal temperature.
S3, purchasing a cyclohexene reagent (the purity is more than or equal to 98.0 percent), subpackaging the cyclohexene reagent into a 100 ml brown glass bottle in a measuring cylinder volume mode, and tightly covering the bottle; recording the sample amount of each bottle, numbering according to the subpackaging sequence, and marking as a component B; the prepared sample should be protected from light and stored at normal temperature.
S4, when in use, 50 mL of the component B is poured into an original bottle containing 150 mL of the component A, and after shaking for 5 minutes manually, a capacity verification sample is obtained, namely, an induction period test can be carried out.
Example 5
The embodiment provides a sample for verifying the capacity of a gasoline induction period, and the preparation method comprises the following steps:
s1, selection and preparation of a blank gasoline sample:
1. selecting and cleaning a blank gasoline sampling barrel. Selecting a commercial 30-liter iron barrel, respectively cleaning with absolute ethyl alcohol and petroleum ether, airing, and keeping for later use, wherein metal scraps such as iron, copper and the like are prevented from being polluted in the period.
2. The blank gasoline sample can be selected from commercially available finished product gasoline (VI) for vehicles, a sample is taken from a fuel gun, enough samples are obtained at one time, and laboratory detection is carried out to verify whether the samples meet the requirements.
S2, manually stirring and homogenizing the blank gasoline sample in a stainless steel sample mixing barrel for about 15 minutes, standing for about 5 minutes, subpackaging the blank gasoline sample in a 250 ml brown glass bottle in a measuring cylinder volume mode, and tightly covering the bottle; recording the sample amount of each bottle, numbering according to the subpackaging sequence, and marking as a component A; the prepared component A should be protected from light and stored at normal temperature.
S3, purchasing a cyclohexene reagent (the purity is more than or equal to 98.0 percent), subpackaging the cyclohexene reagent into a 100 ml brown glass bottle in a measuring cylinder volume mode, and tightly covering the bottle; recording the sample amount of each bottle, numbering according to the subpackaging sequence, and marking as a component B; the prepared sample should be protected from light and stored at normal temperature.
S4, when in use, pouring 60 mL of the component B into an original bottle containing 140 mL of the component A, manually shaking for 5 minutes to obtain a capacity verification sample, and then carrying out an induction period test.
Example 6
The embodiment provides a sample for verifying the capacity of a gasoline induction period, and the preparation method comprises the following steps:
s1, selection and preparation of a blank gasoline sample:
1. selecting and cleaning a blank gasoline sampling barrel. Selecting a commercial 30-liter iron barrel, respectively cleaning with absolute ethyl alcohol and petroleum ether, airing, and keeping for later use, wherein metal scraps such as iron, copper and the like are prevented from being polluted in the period.
2. The blank gasoline sample can be selected from commercially available finished product gasoline (VI) for vehicles, a sample is taken from a fuel gun, enough samples are obtained at one time, and laboratory detection is carried out to verify whether the samples meet the requirements.
S2, manually stirring and homogenizing the blank gasoline sample in a stainless steel sample mixing barrel for about 15 minutes, standing for about 5 minutes, subpackaging the blank gasoline sample in a 250 ml brown glass bottle in a measuring cylinder volume mode, and tightly covering the bottle; recording the sample amount of each bottle, numbering according to the subpackaging sequence, and marking as a component A; the prepared component A should be protected from light and stored at normal temperature.
S3, purchasing a cyclohexene reagent (the purity is more than or equal to 98.0 percent), subpackaging the cyclohexene reagent into a 100 ml brown glass bottle in a measuring cylinder volume mode, and tightly covering the bottle; recording the sample amount of each bottle, numbering according to the subpackaging sequence, and marking as a component B; the prepared sample should be protected from light and stored at normal temperature.
S4, when in use, 58 mL of the component B is poured into an original bottle containing 142 mL of the component A, and after shaking for 5 minutes manually, a capacity verification sample is obtained, namely, an induction period test can be carried out.
Example 7
The embodiment provides a sample for verifying the capacity of a gasoline induction period, and the preparation method comprises the following steps:
s1, selection and preparation of a blank gasoline sample:
1. selecting and cleaning a blank gasoline sampling barrel. Selecting a commercial 30-liter iron barrel, respectively cleaning with absolute ethyl alcohol and petroleum ether, airing, and keeping for later use, wherein metal scraps such as iron, copper and the like are prevented from being polluted in the period.
2. The blank gasoline sample can be selected from commercially available finished product gasoline (VI) for vehicles, a sample is taken from a fuel gun, enough samples are obtained at one time, and laboratory detection is carried out to verify whether the samples meet the requirements.
S2, manually stirring and homogenizing the blank gasoline sample in a stainless steel sample mixing barrel for about 15 minutes, standing for about 5 minutes, subpackaging the blank gasoline sample in a 250 ml brown glass bottle in a measuring cylinder volume mode, and tightly covering the bottle; recording the sample amount of each bottle, numbering according to the subpackaging sequence, and marking as a component A; the prepared component A should be protected from light and stored at normal temperature.
S3, purchasing a cyclohexene reagent (the purity is more than or equal to 98.0 percent), subpackaging the cyclohexene reagent into a 100 ml brown glass bottle in a measuring cylinder volume mode, and tightly covering the bottle; recording the sample amount of each bottle, numbering according to the subpackaging sequence, and marking as a component B; the prepared sample should be protected from light and stored at normal temperature.
S4, when in use, 68 mL of the component B is poured into an original bottle containing 132 mL of the component A, and after shaking for 5 minutes manually, a capacity verification sample is obtained, namely, an induction period test can be carried out.
Wherein, the results of the induction period of the capacity verification samples obtained in the above examples are as follows:
when component B (cyclohexene) is 30% by volume, the induction period for the capacity-verified sample obtained in example 5 is about 600 minutes; when component B (cyclohexene) was 40% by volume, the induction period for the capacity-verified sample obtained in example 2 was about 360 minutes.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A sample for verifying the capacity of a gasoline induction period is characterized by comprising a component A and a component B; the component A is a blank gasoline sample; the component B is cyclohexene; the volume ratio of the component A to the component B is (5-9) to (5-1).
2. The sample for verifying the capacity of gasoline in induction period as claimed in claim 1, wherein the volume ratio of the component A to the component B is (6-8): (4-2).
3. The sample for verifying the gasoline induction period capability of claim 2, wherein the volume ratio of the component A to the component B is (6.5-7.5): (3.5-2.5).
4. The sample for verifying the capacity of the induction period of the gasoline as claimed in any one of claims 1 to 3, wherein the blank gasoline sample is motor gasoline.
5. A method for preparing the capability verification sample according to any one of claims 1 to 4, comprising the steps of:
measuring a blank gasoline sample as the component A and measuring cyclohexene as the component B according to the volume ratio of the component A to the component B;
and (3) independently packaging the measured component B and the component A, and adding the measured component B into the component A for mixing before carrying out induction period detection in a laboratory to obtain the capacity verification sample.
6. A sample for capability verification prepared by the preparation method according to claim 5.
7. A proficiency testing sample according to claim 6, wherein said proficiency testing sample has an induction period of (300-600) minutes.
8. Use of the sample for testing the capability of any one of claims 1 to 4 and 6 to 7 in testing the capability of gasoline during induction period.
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| CN202011364100.4A CN112414815A (en) | 2020-11-27 | 2020-11-27 | Gasoline induction period capacity verification sample, preparation method and application |
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| CN202011364100.4A CN112414815A (en) | 2020-11-27 | 2020-11-27 | Gasoline induction period capacity verification sample, preparation method and application |
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Application publication date: 20210226 |