Method for detecting benzene, toluene and xylene in ethanol
A detection method, the technology of xylene, which is applied in the field of chemical detection, can solve the problems of no detection standards, etc., and achieve the effect of low detection limit
Inactive Publication Date: 2020-04-10
江苏恒信检验有限公司
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The current national standard GB / T 394.1-2008 industrial ethanol and GB 10343-2008 edible ethanol have no specific requirements for benzene, toluene, ethylbenzene, p-xylene, meta-xylene, ortho-xylene, so there is no corresponding testing standard
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] The detection method of benzene, toluene and xylene in a kind of ethanol of the present invention will be described in further detail below through specific examples.
[0016] A method for detecting benzene, toluene and xylene in ethanol, the instrument used is: an Agilent 6890N gas chromatograph equipped with a FID detector, a split / splitless injection port, and a chromatographic column: DB-1;
[0017] Set the instrument parameters according to the following parameters: injection volume: 1ul, chromatographic analysis conditions: inlet temperature 270°C, split ratio 10:1, constant pressure mode 80kpa, chromatographic oven temperature, initial 50°C, hold for 5 minutes, 5°C / min to raise to 100°C, hold for 0 minutes, 10°C / min to raise to 200°C;
[0018] Steps:
[0019] a, mixed standard solution mother liquor: prepare an ethanol solution containing benzene, toluene, ethylbenzene, p-xylene, m-xylene, o-xylene, 10ul of each impurity into 100ml of ethanol; the benzene, tolue...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| density | aaaaa | aaaaa |
| density | aaaaa | aaaaa |
| density | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a method for detecting benzene, toluene and xylene in ethanol, which adopts a gas chromatograph and is provided with an FID detector, a shunt / non-shunt sample inlet and a chromatographic column DB-1; the method comprises the following steps: preparing mixed standard solution mother liquor, namely preparing an ethanol solution containing benzene, methylbenzene, ethylbenzene, p-xylene, m-xylene and o-xylene, and adding 10mu l of impurities into 100ml of ethanol; then respectively transferring 10ml of mixed standard solution mother liquor and 50ml of mixed standard solution mother liquor to prepare a mixed standard solution 1 and a mixed standard solution 2, and carrying out calibration curve fitting on the prepared mixed standard solution 1 and mixed standard solution 2 to prepare a detection standard; and finally detecting the sample: directly taking the sample ethanol, fixing the volume to 100ml by using a volumetric flask, adding 10mu l of internal standard substance sec-butyl alcohol into the ethanol solution, uniformly shaking, standing, and putting into a container for detection. The method is low in detection limit, and can quantitatively detect 0.5 mg / kg of benzene, methylbenzene, ethylbenzene, p-xylene, m-xylene and o-xylene.
Description
【Technical field】 [0001] The invention relates to the technical field of chemical detection methods, in particular to a detection method of benzene, toluene and xylene in ethanol. 【Background technique】 [0002] Ethanol (alcohol) is an important food and industrial raw material. In normal production, there will be no aromatic content, but it is difficult to avoid it during transportation. It is of great significance to control the content of impurities benzene, toluene, ethylbenzene, p-xylene, m-xylene and o-xylene. The current national standard GB / T 394.1-2008 industrial ethanol and GB 10343-2008 edible ethanol have no specific requirements for p-benzene, toluene, ethylbenzene, p-xylene, m-xylene and o-xylene, so there is no corresponding testing standard. [Content of the invention] [0003] In order to solve the above-mentioned problems, the object of the present invention is to provide a method for detecting the contents of benzene, toluene and xylene in ethanol. [...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
CPCG01N30/88G01N2030/884
Inventor 林建张海东周洁申佳威
Owner 江苏恒信检验有限公司