CN104597180A - Analysis method for determining furfural content in extract oil and raffinate oil extracted by aromatic hydrocarbons - Google Patents
Analysis method for determining furfural content in extract oil and raffinate oil extracted by aromatic hydrocarbons Download PDFInfo
- Publication number
- CN104597180A CN104597180A CN201310530434.8A CN201310530434A CN104597180A CN 104597180 A CN104597180 A CN 104597180A CN 201310530434 A CN201310530434 A CN 201310530434A CN 104597180 A CN104597180 A CN 104597180A
- Authority
- CN
- China
- Prior art keywords
- furfural
- sample
- oil
- extract
- content
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention relates to an analysis method for determining furfural content in extract oil and raffinate oil extracted by aromatic hydrocarbons, which employs steps of employing a polarity packed column and optimizing chromatographic analysis condition for completely separate a furfural component. Preferably, a methanol solvent and rotation separating are employed for extracting furfural in extract oil and raffinate oil extracted by aromatic hydrocarbons. A furfural standard sample is used, a furfural quantitative work curve is drafted by linear regression based on least square method, furfural content of the sample in the methanol extract can be obtained by using an external standard method, and then the furfural content of the sample can be calculated. The analysis method has the characteristics of high accuracy, low detection limit, fast analysis speed and simple operation, application prospect is wide, and the analysis method provides powerful technical support for guiding extracting production and scientific research of heavyweight aromatic hydrocarbon in catalyzed oil slurry or recycle oil.
Description
Technical field
The present invention relates to a kind of Aromatics Extractive Project and extract oil out and the analytical approach of middle furfural content mensuration of raffinating oil, particularly a kind of method utilizing gas chromatographic technique quantitative test catalytic slurry or recycle stock Aromatics Extractive Project to extract oil and middle furfural content of raffinating oil out.
Background technology
In oil refining is produced, solvent is made with furfural, heavy arene in catalytic slurry or recycle stock is extracted, obtain high-purity heavy arene and high-quality wax oil, this is an advanced production technology, aromatic hydrocarbons Extract out and eject the raffinate come from extraction tower at the bottom of extraction tower, all containing a large amount of furfural solvent, need reclaim for recycling, also obtain qualified extraction oil heavy arene and wax oil of raffinating oil simultaneously, in production, require that extraction oil and middle furfural content of raffinating oil all are less than mass percentage 0.1% (% (m/m)).The Aromatics Extractive Project having not yet to see catalytic slurry or recycle stock extracts the report of oil and middle furfural content assay method of raffinating oil out, therefore, the necessary Aromatics Extractive Project to catalytic slurry or recycle stock extracts mensuration that is oily and middle furfural content of raffinating oil out, set up accurate, sensitive, quick, an easy analytical approach, for instructing the heavy arene extracting in catalytic slurry or recycle stock to produce, provide strong technical support.
Summary of the invention
Its object of the present invention is just to provide a kind of Aromatics Extractive Project to extract oil out and the analytical approach of middle furfural content mensuration of raffinating oil, this method has the advantages that degree of accuracy is high, detectability is low, analysis speed is fast, easy and simple to handle, have a extensive future, for instructing extracting production and the scientific research of heavy arene in catalytic slurry or recycle stock, provide strong technical support.
Realize above-mentioned purpose and the technical scheme taked, described method comprises the foundation of GC conditions, the mensuration of furfural content in the pre-treatment of sample and sample; Described gas chromatograph is furnished with chem workstation; Concrete steps comprise:
(1) foundation of GC conditions
Chromatographic column: stainless stee l packed column, 2.4m × 3.2mm, immobile liquid is 1%SP-1000 (TPA modified poly (ethylene glycol)), and carrier is 60/80 object Carbopack B;
Carrier gas: high pure nitrogen N
2, 30mL/min ~ 50mL/min;
Burning gas: high-purity hydrogen H
2, 35mL/min ~ 45mL/min;
Combustion-supporting gas: purification of compressed air Air, 350mL/min ~ 450mL/min;
Injection port temperature: 170 DEG C ~ 210 DEG C;
Column temperature: initial temperature 170 DEG C ~ 190 DEG C, is warming up to 190 DEG C ~ 210 DEG C with 4 DEG C/min ~ 6 DEG C/min, keeps 2min ~ 4min, then is warming up to 230 DEG C ~ 240 DEG C with 30 DEG C/min ~ 40 DEG C/min;
Flame ionization ditector temperature: 280 DEG C ~ 320 DEG C;
Sample size: 0.8uL ~ 1.0uL;
(2) pre-treatment of sample
Take 3g ~ 5g (accurate to 0.001g) sample with test tube, accurately pipette methyl alcohol 3mL ~ 5mL and enter in test tube.Test tube is placed in 50 DEG C ~ 60 DEG C waters bath with thermostatic control to heat, more fully tube shaken is dissolved to oil sample, then test tube is put into water-bath, leave standstill 20min.Then test tube is put into hydro-extractor high speed to rotate, make the layering of oil sample extract, get supernatant liquid, injecting chromatograph is analyzed;
(3) mensuration of furfural content in sample
With methanol as solvent, prepare the furfural standard solution of a series of variable concentrations, sample introduction analysis on chromatograph, the peak height of furfural in each standard solution or peak area value are associated with its content, Criterion curve, adopts external standard method to carry out furfural content in the methanol extraction liquid of working sample;
Testing sample is after pre-treatment, direct for methanol extraction liquid injecting chromatograph is analyzed, measures peak height or the peak area value of furfural in extract, generally adopt peak area value, furfural content value in extract can be drawn by typical curve, then be gone out the furfural content of sample by following formulae discovery;
A
1: furfural peak area in extract;
A
0: furfural peak area in standard solution;
C
0: the furfural content of standard solution, unit: g/L;
V: methyl alcohol volume, unit: L;
W: sample weight, unit: g.
The present invention has the following advantages:
(1) precision is high, accuracy good: the relative standard deviation <6% of sample determination result, and recovery of standard addition is between 94% ~ 110%;
(2) detectability is low: when sample furfural content is when 0.10% (% (m/m)), clearly, minimum detectable quantity (MDQ) is 1.9 × 10 to furfural signal
-8g (signal to noise ratio (S/N ratio) is 2).Therefore utilize the inventive method can detect catalytic slurry or recycle stock Aromatics Extractive Project delicately and extract oil and middle furfural content of raffinating oil out;
(3) easy and simple to handle: direct for extract injecting chromatograph, after methanol extraction, is analyzed by oil sample, and the instrumental analysis time completing a sample only needs about 8min;
(4) quantitatively noiseless: under the analysis condition determined, furfural component is separated completely, quantitatively not disturbing of furfural.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
The quantitation curves that Fig. 1 is furfural mass concentration when being 0.90g/L ~ 50.00g/L, regression equation:
Y＝4471.1X+23038(R＝0.9996)。
The analysis of spectra of Fig. 2 to be furfural mass concentration be 5.00g/L standard solution.
The analysis of spectra of Fig. 3 to be furfural mass concentration be 30.00g/L standard solution.
Fig. 4 is the methanol extraction liquid analysis of spectra of B sample.
Embodiment
Described method comprises the foundation of GC conditions, the mensuration of furfural content in the pre-treatment of sample and sample; Described gas chromatograph is furnished with chem workstation; Concrete steps comprise:
(1) foundation of GC conditions
Chromatographic column: stainless stee l packed column, 2.4m × 3.2mm, immobile liquid is 1%SP-1000 (TPA modified poly (ethylene glycol)), and carrier is 60/80 object Carbopack B;
Carrier gas: high pure nitrogen N
2, 30mL/min ~ 50mL/min;
Burning gas: high-purity hydrogen H
2, 35mL/min ~ 45mL/min;
Combustion-supporting gas: purification of compressed air Air, 350mL/min ~ 450mL/min;
Injection port temperature: 170 DEG C ~ 210 DEG C;
Column temperature: initial temperature 170 DEG C ~ 190 DEG C, is warming up to 190 DEG C ~ 210 DEG C with 4 DEG C/min ~ 6 DEG C/min, keeps 2min ~ 4min, then is warming up to 230 DEG C ~ 240 DEG C with 30 DEG C/min ~ 40 DEG C/min;
Flame ionization ditector temperature: 280 DEG C ~ 320 DEG C;
Sample size: 0.8uL ~ 1.0uL;
(2) pre-treatment of sample
Take 3g ~ 5g (accurate to 0.001g) sample with test tube, accurately pipette methyl alcohol 3mL ~ 5mL and enter in test tube.Test tube is placed in 50 DEG C ~ 60 DEG C waters bath with thermostatic control to heat, more fully tube shaken is dissolved to oil sample, then test tube is put into water-bath, leave standstill 20min.Then test tube is put into hydro-extractor high speed to rotate, make the layering of oil sample extract, get supernatant liquid, injecting chromatograph is analyzed;
(3) mensuration of furfural content in sample
With methanol as solvent, prepare the furfural standard solution of a series of variable concentrations, sample introduction analysis on chromatograph, the peak height of furfural in each standard solution or peak area value are associated with its content, Criterion curve, adopts external standard method to carry out furfural content in the methanol extraction liquid of working sample;
Testing sample is after pre-treatment, direct for methanol extraction liquid injecting chromatograph is analyzed, measures peak height or the peak area value of furfural in extract, generally adopt peak area value, furfural content value in extract can be drawn by typical curve, then be gone out the furfural content of sample by following formulae discovery;
A
1: furfural peak area in extract;
A
0: furfural peak area in standard solution;
C
0: the furfural content of standard solution, unit: g/L;
V: methyl alcohol volume, unit: L;
W: sample weight, unit: g.
Utilize gas chromatographic technique, use flame ionization ditector, analyze the method for catalytic slurry or recycle stock aromatic hydrocarbons extraction oil and middle furfural content of raffinating oil.Oil sample methyl alcohol makes extract, furfural in extraction oil, stratographic analysis is carried out to methanol phase, imported polarity chromatographic column, under temperature programme condition, furfural and other component are separated completely, and are detected by flame ionization ditector, the chromatogram of the whole detachment process of chromatographic work station record and peak height thereof and peak area, adopt external standard method to calculate furfural content in oil sample.
Adopt chromatographic column: stainless stee l packed column, 2.4m × 3.2mm, immobile liquid is 1%SP-1000 (TPA modified poly (ethylene glycol)), and carrier is 60/80 object Carbopack B, and optimizes column temperature condition, makes furfural Component seperation good, does not quantitatively disturb.
Adopt flame ionization ditector and suitable flow rate of carrier gas, make the chromatogram response signal of furfural component high.
Pre-treatment is carried out to sample: take 3g ~ 5g (accurate to 0.001g) sample with test tube, accurately pipette methyl alcohol 3mL ~ 5mL and enter in test tube.Test tube is placed in 50 DEG C ~ 60 DEG C waters bath with thermostatic control to heat, more fully tube shaken is dissolved to oil sample, then test tube is put into water-bath, leave standstill 20min.Then test tube is put into hydro-extractor high speed to rotate, make the layering of oil sample extract.Extraction solvent particular methanol.
To the methanol extraction liquid of sample, chromatograph adopts its furfural content of external standard method.Prepare the furfural standard solution of a series of variable concentrations, the peak height of furfural in each standard solution or peak area value are associated with its content, Criterion curve.
This method precision is high, accuracy good, and the relative standard deviation <6% of sample determination result, recovery of standard addition is between 94% ~ 110%.
Detectability is low, and minimum detectable quantity (MDQ) is 1.9 × 10
-8g (signal to noise ratio (S/N ratio) is 2).
Below will the present invention is further illustrated with specific embodiment, but the present invention is by the restriction of these embodiments.
In embodiment, gas chromatograph used is the PE XL of PE company of the U.S..
Furfural standard items: purity >99.5%, Tianjin Deng Feng chemical reagent factory.
Methanol solvate: analyze pure, a chemical reagent company limited is tried in Shanghai.
The foundation of embodiment 1 typical curve
Analysis condition is as follows:
Chromatographic column: stainless stee l packed column, 2.4m × 3.2mm, immobile liquid is 1%SP-1000 (TPA modified poly (ethylene glycol)), and carrier is 60/80 object Carbopack B.
Carrier gas: high pure nitrogen N
2, 40mL/min;
Burning gas: high-purity hydrogen H
2, 40mL/min;
Combustion-supporting gas: purification of compressed air Air, 400mL/min;
Injection port temperature: 200 DEG C;
Column temperature: initial temperature 180 DEG C, is warming up to 200 DEG C with 5 DEG C/min, keeps 3min, then is warming up to 240 DEG C with 40 DEG C/min;
Detector temperature: 300 DEG C;
Balance: sensibility reciprocal is 0.0001g;
Sample: 4g;
Formaldehyde: 4mL;
Water bath with thermostatic control: 60 DEG C
Sample size: 1uL.
In considering that heavy aromatics extracting is produced, catalytic slurry or recycle stock Aromatics Extractive Project are extracted oil out and raffinate oil middle furfural content generally lower than 2% (% (m/m)), and production control index is for being less than 0.1% (% (m/m)), extract by above condition, then in corresponding methanol extraction liquid, furfural content is 0.9g/L, thus in production application, for the mensuration of furfural content in methanol extraction liquid, generally set up the paced work curve of 0.90g/L ~ 50.00g/L.
In 50mL volumetric flask, take 2.500g furfural, use methanol solvate constant volume, prepare the furfural standard solution that furfural mass concentration is 50.00g/L.This standard solution is diluted to respectively 0.90,5.00,10.00, the furfural standard solution of 30.00g/L, under above analysis condition, carry out stratographic analysis, each standard solution measured 3 times respectively, averages, analyze data in table 1.The linear regression of least square method is adopted to carry out drawing standard curve, with furfural mass concentration for horizontal ordinate, with its peak area mean value for ordinate, R is linearly dependent coefficient, a quantitation curves can be obtained, the quantitation curves of Fig. 1 to be furfural mass concentration be 0.90g/L ~ 50.00g/L, regression equation: Y=4471.1X+23038 (R=0.9996).The analysis of spectra of Fig. 2 to be furfural mass concentration be 5.00g/L standard solution, furfural chromatographic peak retention time is 3.870min.The analysis of spectra of Fig. 3 to be furfural mass concentration be 30.00g/L standard solution, furfural chromatographic peak retention time is 3.810min.Noiseless to the quantitative test of furfural in standard solution under this condition visible.
Table 1 furfural standards solution analysis data
The investigation of embodiment 2 accuracy
Under the analysis condition identical with embodiment 1, be that the standard solution of 3.00g/L measures 6 times by furfural mass concentration, the standard deviation of mensuration is 0.15g/L, and relative standard deviation is 5.0%; Be that the standard solution of 40.00mg/L measures 6 times by furfural mass concentration, standard deviation is 1.77mg/L, and relative standard deviation is 4.4%.
Embodiment 3 mark-on recovery test
In 3.950g slurry oil, add 0.050g furfural reference material, preparation A sample, its furfural content is 1.25% (% (m/m)).Be add 0.150g reference material in the extraction oil of 0.50% (% (m/m)) at 3.850g furfural content, preparation B sample, its furfural content is 4.23% (% (m/m)).
Under the analysis condition identical with embodiment 1, pre-treatment is carried out to A sample and B sample, these 2 preparation liquid are measured 6 times respectively, recovery testu is carried out to furfural contained in this 2 sample, acquired results is in table 2, table 3, the relative standard deviation <6% measured, the recovery is 94% ~ 110%, and this analytical approach has good preci-sion and accuracy as seen.Fig. 4 is the methanol extraction sample analysis of spectra of B sample, and furfural chromatographic peak retention time is 3.831min, and the furfural of visible oil sample is analyzed noiseless.
The analysis data of table 2 mark-on recovery test
The precision of table 3 analytical approach and recovery of standard addition
The investigation of embodiment 4 this method detectability
Under the analysis condition identical with embodiment 1, furfural content is adopted to be the sample analysis 6 times of 0.10% (% (m/m)), obviously, the coefficient of variation is 5.6% to the response of furfural chromatographic peak, and the minimum detectable quantity (MDQ) of furfural is 1.9 × 10
-8g (signal to noise ratio (S/N ratio) is 2).It is calculated as follows:
MDQ＝(2×N×V)/H
N=(detecting amplifier gain) × (integrated attenuation) × (noise intensity mean value);
Noise intensity mean value is 0.01mV;
V=1uL methanol extraction liquid enters the furfural quality of detection;
V＝1uL×0.9×0.1％×4g/4000uL＝9×10
-7g；
H=(detecting amplifier gain) × (integrated attenuation) × (furfural peak height mean value);
Furfural peak height mean value is 0.95mV;
MDQ＝1.9×10
-8g。
The applicability of embodiment 5 the inventive method
Under the analysis condition identical with embodiment 1, analyze Jiujiang Branch Company, SINOPEC
In Dec, 2009 is that the aromatic hydrocarbons of raw material is extracted oil out and raffinates oil with catalytic slurry, and in August, 2010 take FCC recycle oil as the aromatic hydrocarbons extraction oil of raw material and raffinates oil, and analysis result is in table 4.This analytical approach for instructing " peace, steady, long, full, excellent " of SINOPEC Jiujiang Company heavy aromatics extraction plant to produce, has played active and effective effect always.
Data are analyzed in the production monitoring of table 4 heavy aromatics extracting
Claims (1)
1. Aromatics Extractive Project extracts the analytical approach that oil and middle furfural content of raffinating oil measure out, and it is characterized in that, described method comprises the foundation of GC conditions, the mensuration of furfural content in the pre-treatment of sample and sample; Described gas chromatograph is furnished with chem workstation; Concrete steps comprise:
(1) foundation of GC conditions
Chromatographic column: stainless stee l packed column, 2.4m × 3.2mm, immobile liquid is 1% SP-1000(TPA modified poly (ethylene glycol)), carrier is 60/80 object Carbopack B;
Carrier gas: high pure nitrogen N
2, 30mL/min ~ 50mL/min;
Burning gas: high-purity hydrogen H
2, 35mL/min ~ 45mL/min;
Combustion-supporting gas: purification of compressed air Air, 350mL/min ~ 450mL/min;
Injection port temperature: 170 DEG C ~ 210 DEG C;
Column temperature: initial temperature 170 DEG C ~ 190 DEG C, is warming up to 190 DEG C ~ 210 DEG C with 4 DEG C/min ~ 6 DEG C/min, keeps 2min ~ 4min, then is warming up to 230 DEG C ~ 240 DEG C with 30 DEG C/min ~ 40 DEG C/min;
Flame ionization ditector temperature: 280 DEG C ~ 320 DEG C;
Sample size: 0.8uL ~ 1.0uL;
(2) pre-treatment of sample
3g ~ 5g(is taken accurate to 0.001g with test tube) sample, accurately pipette methyl alcohol 3mL ~ 5mL and enter in test tube;
Test tube is placed in 50 DEG C ~ 60 DEG C waters bath with thermostatic control to heat, more fully tube shaken is dissolved to oil sample, then test tube is put into water-bath, leave standstill 20min;
Then test tube is put into hydro-extractor high speed to rotate, make the layering of oil sample extract, get supernatant liquid, injecting chromatograph is analyzed;
(3) mensuration of furfural content in sample
With methanol as solvent, prepare the furfural standard solution of a series of variable concentrations, sample introduction analysis on chromatograph, the peak height of furfural in each standard solution or peak area value are associated with its content, Criterion curve, adopts external standard method to carry out furfural content in the methanol extraction liquid of working sample;
Testing sample is after pre-treatment, direct for methanol extraction liquid injecting chromatograph is analyzed, measures peak height or the peak area value of furfural in extract, generally adopt peak area value, furfural content value in extract can be drawn by typical curve, then be gone out the furfural content of sample by following formulae discovery;
A
1: furfural peak area in extract;
A
0: furfural peak area in standard solution;
C
0: the furfural content of standard solution, unit: g/L;
V: methyl alcohol volume, unit: L;
W: sample weight, unit: g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310530434.8A CN104597180B (en) | 2013-10-31 | 2013-10-31 | A kind of analysis method of Aromatics Extractive Project tapped oil and middle furfural content measure of raffinating oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310530434.8A CN104597180B (en) | 2013-10-31 | 2013-10-31 | A kind of analysis method of Aromatics Extractive Project tapped oil and middle furfural content measure of raffinating oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104597180A true CN104597180A (en) | 2015-05-06 |
| CN104597180B CN104597180B (en) | 2018-04-24 |
Family
ID=53123099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310530434.8A Active CN104597180B (en) | 2013-10-31 | 2013-10-31 | A kind of analysis method of Aromatics Extractive Project tapped oil and middle furfural content measure of raffinating oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104597180B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108458943A (en) * | 2017-09-11 | 2018-08-28 | 中国石油天然气股份有限公司 | The assay method of furfural content in Catalytic Cracking Slurry Oil With Furfural refined oil |
| CN111398485A (en) * | 2020-04-27 | 2020-07-10 | 深圳供电局有限公司 | Method for detecting furfural content in transformer oil |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07263242A (en) * | 1994-03-25 | 1995-10-13 | Mitsubishi Electric Corp | Method and apparatus for diagnosing lifetime of oil immersed electric machine |
| US20050064076A1 (en) * | 2003-09-22 | 2005-03-24 | Fmc Technologies, Inc. | Method of measuring volatile components of foods |
| WO2010013225A4 (en) * | 2008-08-01 | 2010-03-25 | Universidade Nova De Lisboa | Method for the analysis, identification and quantification of furfurals as food quality markers |
| CN101819187A (en) * | 2009-09-03 | 2010-09-01 | 宏业生化股份有限公司 | Method for chromatographic determination of crude furfuryl alcohol composition |
| CN103149309A (en) * | 2011-12-06 | 2013-06-12 | 上海宝钢工业检测公司 | Measuring method for the furfural content of transformer oil |
-
2013
- 2013-10-31 CN CN201310530434.8A patent/CN104597180B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07263242A (en) * | 1994-03-25 | 1995-10-13 | Mitsubishi Electric Corp | Method and apparatus for diagnosing lifetime of oil immersed electric machine |
| US20050064076A1 (en) * | 2003-09-22 | 2005-03-24 | Fmc Technologies, Inc. | Method of measuring volatile components of foods |
| WO2010013225A4 (en) * | 2008-08-01 | 2010-03-25 | Universidade Nova De Lisboa | Method for the analysis, identification and quantification of furfurals as food quality markers |
| CN101819187A (en) * | 2009-09-03 | 2010-09-01 | 宏业生化股份有限公司 | Method for chromatographic determination of crude furfuryl alcohol composition |
| CN103149309A (en) * | 2011-12-06 | 2013-06-12 | 上海宝钢工业检测公司 | Measuring method for the furfural content of transformer oil |
Non-Patent Citations (5)
| Title |
|---|
| GöKHAN DURMAZ 等: "Determination of 5-hydroxymethyl-2-furfural and 2-furfural in oils as indicators of heat pre-treatment", 《FOOD CHEMISTRY》 * |
| SPINGARN N E 等: "Analysis of volatile hazardous substances by GC/MS", 《JOURNAL OF CHROMATOGRAPHIC SCIENCE》 * |
| 刘吉金 等: "红核妇洁洗液含量测定方法的改进", 《中国药品标准》 * |
| 杨晓瑛 等: "高效液相色谱法测定变压器油中的微量糠醛", 《吉林电力技术》 * |
| 潘春梅 等: "气相色谱法测定秸秆水解液中的糠醛和乙酸含量", 《酿酒科技》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108458943A (en) * | 2017-09-11 | 2018-08-28 | 中国石油天然气股份有限公司 | The assay method of furfural content in Catalytic Cracking Slurry Oil With Furfural refined oil |
| CN111398485A (en) * | 2020-04-27 | 2020-07-10 | 深圳供电局有限公司 | Method for detecting furfural content in transformer oil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104597180B (en) | 2018-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102768256B (en) | Comprehensive two-dimensional gas chromatography method for quantitatively determining diamondoid hydrocarbons in petroleum sample | |
| CN110296931A (en) | A kind of characterizing method and system of tight sand oil-water relative permeability information | |
| CN103149309A (en) | Measuring method for the furfural content of transformer oil | |
| CN109540735B (en) | Shale gas-containing comprehensive analysis device and method | |
| CN105158395A (en) | Soil analysis method with coupling of solid-liquid extraction and solid phase microextraction | |
| CN103575845B (en) | Comprehensive two-dimensional gas chromatography quantitative analysis method of aromatic sterane compound in petroleum | |
| CN109799300B (en) | Method for analyzing and detecting petroleum sulfonate content in oil sample | |
| CN104597180A (en) | Analysis method for determining furfural content in extract oil and raffinate oil extracted by aromatic hydrocarbons | |
| CN101393180B (en) | Method for measuring beta-naphthol content in additive agent for cigarette | |
| CN114152691A (en) | Method for analyzing contents of cyclopentane and extractant by gas chromatography | |
| CN104502477A (en) | Analysis method of organic matters in trichloracetic aldehyde waste sulfuric acid | |
| CN107037151B (en) | A kind of measuring method of transfer volume of epoxy chloropropane in food contact material | |
| CN104330504B (en) | The detection method of content of bisphenol A in food contact material | |
| CN108020608A (en) | A kind of method of methane content in detection water | |
| CN102338779B (en) | Method for detecting sorbic acid content in cheese | |
| CN104280474B (en) | High performance liquid chromatography fluorescence detection method for simultaneously detecting 4 forbidden additives in tobacco flavor and fragrance | |
| CN103399111B (en) | Method for selectively measuring ethylene glycol monoethyl ether acetate in dry food packaging paper based on headspace-gas chromatography/mass spectrometry | |
| CN102749405A (en) | Quantitative analysis method for pentacyclic triterpane compound in petroleum sample | |
| CN103235053B (en) | Method for determining tributyl phosphate in dry food packaging paper | |
| CN104391055B (en) | A kind of method detecting, analyze benzo [a] pyrene in grain | |
| CN104764836A (en) | Organochlorine content determination method | |
| CN101846660B (en) | Determination method of trace furadan | |
| CN103592380B (en) | Quantitative analysis method of liquid-state products of hydrocarbon generation and expulsion simulation experiment | |
| CN102262141A (en) | Method for detecting 3,3',4',5-tetrachloro-salicylanilide by using high performance liquid chromatograph | |
| CN104833760A (en) | Method for using high-performance liquid chromatography to measure greenhouse tomato soil low-molecular-weight organic acids |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |