CN1485615A - Process for measuring organic residual - Google Patents
Process for measuring organic residual Download PDFInfo
- Publication number
- CN1485615A CN1485615A CNA031538231A CN03153823A CN1485615A CN 1485615 A CN1485615 A CN 1485615A CN A031538231 A CNA031538231 A CN A031538231A CN 03153823 A CN03153823 A CN 03153823A CN 1485615 A CN1485615 A CN 1485615A
- Authority
- CN
- China
- Prior art keywords
- sample
- organic residue
- minute
- detect
- precision
- 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
Images
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a method for determining organic residual, which comprises detecting the unprocessed big hole adsorption resin, and preconditioning the big hole adsorption resin, the detecting method is used under the special chromatographic condition, an internal marker method and an outer marker method are used to proceed the example quantitative determination and residual quantity calculation. The advantages of the method by the invention are, the sample is easy for treatment, the detection is quick and sensitive, each type of organic residual can be detected from the sample.
Description
Technical field:
The present invention relates to a kind of detection method of organic residue, specifically relate to a kind of detection method at organic residue in macroporous absorbent resin, medicine and the food.
Background technology:
Macroporous absorbent resin is a family macromolecule polymkeric substance that grows up nineteen forties, is used for industries such as environmental protection, chemical industry, medicine and food at present in a large number.In recent years, macroporous absorbent resin has been widely used in the enrichment and the purifying of effective constituent in Chinese medicine and the natural drug extract, and it has very important meaning to the modernization of Chinese medicine.But all resins are the chemical industry resin in the market, wherein contain organic residue such as benzene,toluene,xylene, styrene, diethylbenzene, divinylbenzene, naphthalene and alkane etc.; In addition, present many medicines and food have all used macroporous absorbent resin in its production technology, may be residual in these medicines and the food the organic residue in the macroporous absorbent resin; Have again, all used organic solvent in the production technology of many medicines and food itself, also can residual certain amount of organic solvent in these medicines and the food.Yet the detection method of existing organic residue is perfect not to the utmost, and generally speaking, detection method is more loaded down with trivial details mostly, and can not detect various organic residues simultaneously, has influenced the detection effect.By retrieval, the Determination of Residual Organic Solvents determination method of 2000 editions appendix VIII records of the Pharmacopoeia of the People's Republic of China can only detect benzene, chloroform, methylene chloride, pyridine toluene and oxirane; Can measure benzene, toluene, ethylbenzene, dimethylbenzene, styrene, α-Jia Jibenyixi, phenylacetylene etc. in the mensuration capillary gas chromatography of the industrial styrene purity of GB GB/T 12688.1-1998, but its gas phase minute needs 25 minutes; Among the petroleum chemical industry standard SH/T1485.2-95 of the People's Republic of China (PRC) " the mensuration vapor-phase chromatography of each component concentration in the industrial divinylbenzene ", can only detect the content of diethylbenzene, divinylbenzene and naphthalene.In the above listed national standard, the gas chromatographic column of use and chromatographic column of the present invention and testing conditions are inequality, mostly can only detect in the detected organic residue of the present invention a few, can not detect simultaneously, and detection time are longer.The chromatographic column fixed liquid phase of the listed detection method of American Pharmacopeia and the inventive method is same, but the model of chromatographic column and testing conditions are all inequality, and it also can only detect benzene and toluene in the detected organic residue of the inventive method.Therefore, have not yet to see and detection method of the present invention and effect complete class relevant report together thereof.
The detection method that the purpose of this invention is to provide a kind of quick, simple and direct organic residue, particularly provide a kind of sample preparation simple, detect rapid sensitive and can detect the method for various organic residues in the sample simultaneously.
Summary of the invention:
The detection method of the said organic residue of the present invention has adopted following technical scheme:
One, chromatographic condition:
Chromatographic column: fused-silica capillary column, immobile liquid are 6% cyanogen propylbenzenes, 94% dimethyl polysiloxane; Injection port: 150～300 ℃ of temperature, do not shunt; Detecting device: 200～300 ℃ of temperature, hydrogen 20～40mL/ minute, air 200～400mL/ minute, tail nitrogen blowing 20～40mL/ minute; Carrier gas: nitrogen, flow velocity 0.5～10mL/ minute; Column temperature: 30 ℃ rise to 250 ℃, 5～20 ℃/minute of heating rates; Input mode: sample injection, sample size 1 μ L.
Two, sample determination:
Carry out quantitative measurement with internal standard method or external standard method.
The preparation of external standard method typical curve: it is an amount of that precision takes by weighing each reference substance, add the chromatogram absolute dichloromethane and be mixed with standard solution respectively, draw 1 μ L reference substance solution inject gas chromatograph, measure with above-mentioned chromatographic condition, the record gas chromatogram is measured peak height, is horizontal ordinate with concentration, peak height is the ordinate mapping, gets typical curve.
1, solid sample: precision takes by weighing a certain amount of sample and joins in the volumetric flask, a certain amount of methylene chloride of accurate adding, and precision is weighed, and ultrasonic Extraction is weighed again, supplies to subtract weight loss, filters, and gets the filtrate inject gas chromatograph and detects.Calculate the residual quantity of organic residue according to typical curve.
2, fluid sample: precision is measured a certain amount of sample, adds the shaking out of 5mL methylene chloride, gets the dichloromethane layer inject gas chromatograph and detects.Calculate the residual quantity of organic residue according to typical curve.
The preferred plan of the detection method of organic residue of the present invention:
Three, chromatographic condition:
Chromatographic column: DB-624 fused-silica capillary column (30m * 0.32mm * 1.8 μ m, immobile liquid are 6% cyanogen propylbenzenes, 94% dimethyl polysiloxane); Injection port: 220 ℃ of temperature, do not shunt; Detecting device: 250 ℃ of temperature, hydrogen 30mL/ minute, air 300mL/ minute, tail nitrogen blowing 30mL/ minute; Carrier gas: nitrogen, flow velocity 2.5mL/ minute; Column temperature: 40 ℃ of beginnings rise to 190 ℃ with 14 ℃/minute speed; Input mode: sample injection, sample size 1 μ L.
Each mixes organism standard colors spectrogram shown in (Fig. 1); Each chromatographic peak location map is shown in (Fig. 2-11).From each chromatogram result as can be seen, the time of detecting with the inventive method generally all is less than ten minutes, has shown that the present invention detects advantage fast.
Four, sample detection:
Carry out quantitative measurement with internal standard method or external standard method.
The preparation of external standard method typical curve: it is an amount of that precision takes by weighing each reference substance, add the chromatogram absolute dichloromethane and be mixed with standard solution respectively, draw 1 μ L reference substance solution inject gas chromatograph, measure with above-mentioned chromatographic condition, the record gas chromatogram is measured peak height, is horizontal ordinate with concentration, peak height is the ordinate mapping, gets typical curve.
1, solid sample: precision takes by weighing 1 gram sample (macroporous absorbent resin that is untreated is got 0.2 gram) and joins in the 10mL volumetric flask, the accurate 5mL chromatographically pure methylene chloride that adds, and precision is weighed, ultrasonic Extraction 10 minutes is weighed again, supplies to subtract weight loss, filter, get the filtrate inject gas chromatograph and detect.Calculate the residual quantity of organic residue.
2, fluid sample: precision is measured the 1mL sample, adds the 5mL dichloromethane extraction, gets the dichloromethane layer inject gas chromatograph and detects.Calculate the residual quantity of organic residue.
Five, system suitability experiment:
The typical curve and the range of linearity are investigated:
Benzene: 0.5-3ppm, r=0.9941, y=10.26*x-0.65
Toluene: 2-15ppm, r=0.9990, y=26.96*x-3.43
Dimethylbenzene 2-15ppm, r=0.9983, y=13.82*x-3.39
Styrene: 2-15ppm, r=0.9980, y=30.51*x-8.63
Diethylbenzene: 2-15ppm, r=0.9965, y=14.10*x-5.28
Divinylbenzene: 2-15ppm, r=0.9946, y=5.57*x+1.17
Naphthalene: 2-15ppm, r=0.9931, y=23.97*x-14.19
Decane: 1.5-30ppm, r=0.9976, y=29.24*x-21.59
Undecane: 1.5-30ppm, r=0.9980, y=27.27*x-16.94
Dodecane: 1.5-30ppm, r=0.9977, y=25.55*x-18.60
Six, precision test:
With 2ppm benzene standard solution, 4ppm toluene, dimethylbenzene, styrene, diethylbenzene and divinylbenzene standard solution and 3ppm decane, undecane and dodecane standard solution continuous sample introduction five pins, calculate precision with peak height, the result is as follows:
| Tested number | ?1 | ?2 | ??3 | ??4 | ??5 | ?RSD％ | |
| Toluene | ?46.103 | ?45.871 | ??46.185 | ??42.987 | ??43.6 | ?3.4 | |
| Dimethylbenzene | ?31.151 | ?30.745 | ??32.002 | ??29.07 | ??29.711 | ?3.8 |
| Peak height | Styrene | 55.606 | ?54.561 | ?56.294 | ?52.408 | ?53.14 | ?3.0 |
| Divinylbenzene | 35.715 | ?37.621 | ?37.517 | ?34.226 | ?34.645 | ?4.4 | |
| Diethylbenzene | 30.196 | ?30.388 | ?32.611 | ?29.467 | ?30.13 | ?3.9 | |
| Naphthalene | 37.276 | ?37.284 | ?39.366 | ?37.274 | ?37.757 | ?2.4 | |
| Benzene | 20.376 | ?20.640 | ?20.571 | ?20.322 | ?20.981 | ?1.3 | |
| Decane | 22.967 | ?22.451 | ?22.876 | ?22.689 | ?23.285 | ?1.4 | |
| Undecane | 21.535 | ?21.127 | ?20.849 | ?20.654 | ?21.174 | ?1.6 | |
| Dodecane | 20.169 | ?19.801 | ?19.1 | ?18.582 | ?18.975 | ?3.3 |
The result shows that the precision of instrument is good.
Seven, study on the stability
Precision takes by weighing 0.2 gram macroporous absorbent resin HPD500, and add 5mL methylene chloride precision and weigh, ultrasonic Extraction 10 minutes, precision is weighed, and supplies to subtract weight loss, filters, and filtrate is detected with above-mentioned chromatographic condition.Testing result such as following table:
| Numbering | Sample injection time | Toluene ppm | Diethylbenzene ppm | Naphthalene ppm |
| ???1 | 0 hour | ????146.2 | ???292.5 | ????96.7 |
| ???2 | 2 hours | ????146.2 | ???292.5 | ????99.1 |
| ???3 | 3 hours | ????148.6 | ???313.7 | ????106.1 |
| ???4 | 5 hours | ????148.6 | ???313.7 | ????110.8 |
| ???5 | 9 hours | ????148.6 | ???290.1 | ????99.1 |
| ???RSD(％) | ????0.9 | ???4.0 | ????5.8 |
The result shows that it is stable in 8 hours to extract solution.
Eight, reappearance is investigated
Precision takes by weighing five parts of HPD500 macroporous absorbent resin 0.2g and adds the 5mL methylene chloride respectively, and precision is weighed, and ultrasonic Extraction 10 minutes is weighed again, supplies to subtract weight loss, filters, and filtrate is detected with above-mentioned chromatographic condition.Testing result such as following table:
| Numbering | Weight (g) | Toluene ppm | Diethylbenzene ppm | Naphthalene ppm |
| ????1 | ??0.2120 | ????146.2 | ??292.5 | ????96.7 |
| ???2 | ??0.2178 | ????146.3 | ????282.4 | ????96.4 |
| ???3 | ??0.2955 | ????138.7 | ????289.3 | ????98.1 |
| ???4 | ??0.2107 | ????144.8 | ????284.8 | ????97.3 |
| ???5 | ??0.2089 | ????138.8 | ????299.2 | ????107.7 |
| ???RSD(％) | ????2.4 | ????2.3 | ????4.8 |
The result shows that the reappearance of this method is good.
Nine, lowest detectable limit is investigated:
Standard solution inject gas chromatograph with the standard solution of 2ppm benzene standard solution, 4ppm toluene, dimethylbenzene, styrene, diethylbenzene, divinylbenzene, naphthalene and 3ppm decane, undecane, dodecane, detect with above-mentioned chromatographic condition, with chromatogram computed in software signal to noise ratio (S/N ratio), lowest detectable limit=d * 3 * N/S (d is a solution concentration) then, result of calculation following (unit: ppm):
| Benzene | Toluene | Dimethylbenzene | Styrene | Diethylbenzene | Divinylbenzene | Naphthalene | Decane | Undecane | Dodecane | |
| Lowest detectable limit | ??0.01 | ??0.008 | ??0.015 | ??0.007 | ??0.015 | ??0.03 | ??0.01 | ??0.01 | ??0.01 | ??0.01 |
The result shows that this method can satisfy the actual detected requirement to the lowest detectable limit of each organic residue, has shown that the present invention detects the high sensitivity of organic residue.
Ten, recovery test
Take by weighing each 1 gram of cleaner macroporous absorbent resin NKA of pre-service and HPD400, add 70uL500ppm toluene and 60uL500ppm naphthalene standard solution respectively, the methylene chloride precision that adds 4.9mL is weighed, ultrasonic Extraction 10min, precision is weighed again, filter, filtrate is detected with above-mentioned chromatographic condition, and the result is as follows:
NKA
| ????1 | ??2 | ??3 | ??4 | ??5 | ??AVE | ??RSD | ||
| Weight (g) | ????1.0373 | ??1.0105 | ??1.0613 | ??1.0029 | ??1.0381 | |||
| Toluene (u g) | Detection limit | ????42.5 | ??39.5 | ??39.5 | ??38 | ??39.5 | ||
| Yield | ????39.0 | ??36.1 | ??35.9 | ??34.6 | ??36.0 | ??36.3 | ||
| The recovery (%) | ????111.35 | ??103.04 | ??102.55 | ??98.83 | ??102.77 | ??103.71 | ??4.44 | |
| ??( ??u | Detection limit | ????37 | ??37.5 | ??37 | ??35.5 | ??37 | ||
| Yield | ??32.9 | ??33.5 | ??32.8 | ??31.5 | ??32.8 | ??32.7 | ??2.2 | |
| The recovery (%) | ??109.5 | ??111.53 | ??109.18 | ??104.96 | ??109.49 | ??108.93 | ??2.21 |
HPD400
| ????1 | ??2 | ??3 | ??4 | ??5 | ??AVE | ??RSD | ||
| Weight (g) | ????1.1757 | ??1.1328 | ??1.0975 | ??1.1027 | ??1.1106 | |||
| Toluene (u g) | Detection limit | ????36 | ??36.5 | ??35.5 | ??35.5 | ??36 | ||
| Yield | ????34.5 | ??35.0 | ??34.1 | ??34.1 | ??34.6 | ??34.4 | ||
| The recovery (%) | ????98.49 | ??100.08 | ??97.35 | ??97.33 | ??98.73 | ??98.40 | ??1.16 | |
| Naphthalene (u g) | Detection limit | ????32 | ??33 | ??33 | ??34 | ??34 | ||
| Yield | ????26.5 | ??27.7 | ??27.8 | ??28.8 | ??28.8 | ??27.9 | ||
| The recovery (%) | ????88.27 | ??92.25 | ??92.81 | ??96.06 | ??95.03 | ??93.06 | ??3.45 | |
The result shows, the recovery height of this method, and method is reliable.
Below enumerate some embodiment as further specifying, but do not limit the present invention of the present invention.
Embodiment 1:
Macroporous absorbent resin 1 restrained after precision took by weighing purifying, added the 5mL methylene chloride, and precision is weighed, and ultrasonic Extraction 10 minutes is weighed again, filters, and filtrate is carried out vapor detection, result such as following table (unit: ppm):
| Benzene | Toluene | Dimethylbenzene | Styrene | Diethylbenzene | Divinylbenzene | Naphthalene | |
| ??D101 | Do not detect | ??1.6 | Do not detect | Do not detect | ??3.2 | Do not detect | ????4.9 |
| ??D201 | Do not detect | Do not detect | Do not detect | Do not detect | ??4.8 | Do not detect | ????4.9 |
| ??HPD400 | Do not detect | Do not detect | Do not detect | Do not detect | Do not detect | Do not detect | ????3.9 |
Embodiment 2:
Precision takes by weighing unpurified macroporous absorbent resin 0.2 gram, adds the 5mL methylene chloride, and precision is weighed, and ultrasonic Extraction 10 minutes is weighed again, filters, and filtrate is carried out vapor detection, result such as following table (unit: ppm):
| Benzene | Toluene | Dimethylbenzene | Styrene | Diethylbenzene | Divinylbenzene | Naphthalene | |
| ??D101 | Do not detect | ??235.5 | Do not detect | Do not detect | ??266.4 | ??42.5 | ??189.2 |
| ??D201 | Do not detect | Do not detect | Do not detect | Do not detect | ??225.4 | Do not detect | ??179.4 |
| ??HPD400 | Do not detect | ??79.4 | ??14.2 | ??8.5 | ??124.7 | ??70.9 | ??130.4 |
Embodiment 3: precision is measured 020408A safflower sodium chloride injection 1mL, adds the shaking out of 5mL chromatographically pure methylene chloride, and get the dichloromethane layer inject gas chromatograph and detect, testing result such as following table (unit: ppm):
| Lot number | Benzene | Toluene | Dimethylbenzene | Styrene | Diethylbenzene | Divinylbenzene | Naphthalene |
| 020408A | ??＜0.05 | ??＜0.05 | ??＜0.13 | ??＜0.07 | ??＜0.11 | ??＜0.2 | ??＜0.07 |
The invention effect:
Beneficial effect of the present invention has been to provide a kind of detection method of quick, simple and direct organic residue, particularly provide a kind of sample treatment simple, detect fast, sensitive and can detect simultaneously the ways and means of various organic residues in the sample.
Description of drawings:
Fig. 1 respectively mixes organism standard colors spectrogram
Fig. 2 benzene standard colors spectrogram
Fig. 3 toluene standard colors spectrogram
Fig. 4 dimethylbenzene standard colors spectrogram
Fig. 5 styrene standard colors spectrogram
Fig. 6 decane standard colors spectrogram
Fig. 7 diethylbenzene standard colors spectrogram
Fig. 8 undecane standard colors spectrogram
Fig. 9 divinylbenzene standard colors spectrogram
Figure 10 dodecane standard colors spectrogram
Figure 11 naphthalene standard colors spectrogram
Claims (4)
1, a kind of detection method of organic residue mainly comprises the steps:
1), chromatographic condition:
Chromatographic column: fused-silica capillary column, immobile liquid are 6% cyanogen propylbenzene, 94% dimethyl polysiloxane; Injection port: temperature 150-300 ℃, do not shunt; Detecting device: temperature 200-300 ℃, hydrogen 20-40mL/ minute, air 200～400mL/ minute, tail nitrogen blowing 20-40mL/ minute; Carrier gas: nitrogen, flow velocity 0.5-5.0mL/ minute; Column temperature: 30 ℃ rise to 250 ℃, heating rate 5-20 ℃/minute; Input mode: sample injection, sample size 1 μ L;
2), sample determination:
Carry out quantitative measurement with internal standard method or external standard method, the preparation process of described external standard method typical curve is that it is an amount of that precision takes by weighing each reference substance, adds the chromatogram absolute dichloromethane and be mixed with standard solution respectively, draw 1uL reference substance solution inject gas chromatograph, measure by above-mentioned chromatographic condition, the record gas chromatogram is measured peak height, with concentration is horizontal ordinate, peak height is the ordinate mapping, gets typical curve, promptly can be used for measuring solid sample and fluid sample organic residue residual quantity.
2, detection method as claimed in claim 1, the detection step that it is characterized in that solid sample is, precision takes by weighing a certain amount of sample and joins in the volumetric flask, a certain amount of methylene chloride of accurate adding, and precision is weighed, ultrasonic Extraction, weigh again, supply and subtract weight loss, filter, get the filtrate inject gas chromatograph and detect, and calculate the residual quantity of organic residue.
3, detection method as claimed in claim 1 is characterized in that the detection step of fluid sample is, precision is measured a certain amount of sample, add a certain amount of methylene chloride, shaking out is got the dichloromethane layer inject gas chromatograph and is detected, and calculates the residual quantity of organic residue.
4, as claim 1, the application of 2 or 3 described detection methods in detecting macroporous absorbent resin, medicine and food organic residue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03153823 CN1267726C (en) | 2003-08-22 | 2003-08-22 | Process for measuring organic residual |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03153823 CN1267726C (en) | 2003-08-22 | 2003-08-22 | Process for measuring organic residual |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1485615A true CN1485615A (en) | 2004-03-31 |
| CN1267726C CN1267726C (en) | 2006-08-02 |
Family
ID=34156767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03153823 Expired - Fee Related CN1267726C (en) | 2003-08-22 | 2003-08-22 | Process for measuring organic residual |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1267726C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425985C (en) * | 2004-05-27 | 2008-10-15 | 格斯特尔系统技术两合公司 | Collector material based on polusiloxane adsorbability |
| CN101968475A (en) * | 2010-09-09 | 2011-02-09 | 中国烟草总公司郑州烟草研究院 | Method for measuring acrylic acid content in polypropylene fiber adhesive for cigarettes |
| CN1873408B (en) * | 2005-05-30 | 2011-02-23 | 天津市燕化新材料有限公司 | Method for extracting 2 - ethyl hexenal in polyvinyl butyral acetal, and method for measuring content |
| CN103239486A (en) * | 2012-04-23 | 2013-08-14 | 成都百裕科技制药有限公司 | Ginkgo lactone composition for treating cardiovascular and cerebrovascular diseases, and residue determination method |
| CN107703229A (en) * | 2017-10-20 | 2018-02-16 | 河南红东方化工股份有限公司 | A kind of efficient assay method of chloromethanes |
-
2003
- 2003-08-22 CN CN 03153823 patent/CN1267726C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425985C (en) * | 2004-05-27 | 2008-10-15 | 格斯特尔系统技术两合公司 | Collector material based on polusiloxane adsorbability |
| CN1873408B (en) * | 2005-05-30 | 2011-02-23 | 天津市燕化新材料有限公司 | Method for extracting 2 - ethyl hexenal in polyvinyl butyral acetal, and method for measuring content |
| CN101968475A (en) * | 2010-09-09 | 2011-02-09 | 中国烟草总公司郑州烟草研究院 | Method for measuring acrylic acid content in polypropylene fiber adhesive for cigarettes |
| CN101968475B (en) * | 2010-09-09 | 2012-04-25 | 中国烟草总公司郑州烟草研究院 | Method for measuring acrylic acid content in polypropylene fiber adhesive for cigarettes |
| CN103239486A (en) * | 2012-04-23 | 2013-08-14 | 成都百裕科技制药有限公司 | Ginkgo lactone composition for treating cardiovascular and cerebrovascular diseases, and residue determination method |
| CN107703229A (en) * | 2017-10-20 | 2018-02-16 | 河南红东方化工股份有限公司 | A kind of efficient assay method of chloromethanes |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1267726C (en) | 2006-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104655751B (en) | A kind of detect the method for organic solvent residual in dapoxetine | |
| CN111751459A (en) | Method for simultaneously detecting multiple residual solvents in sitafloxacin | |
| CN1267726C (en) | Process for measuring organic residual | |
| CN1857589A (en) | Method of measuring icariin and epimedin c content in Xianlinggubao preparation | |
| CN111855881A (en) | Method for detecting hydroxylamine hydrochloride in azilsartan | |
| CN114002338A (en) | Method for measuring migration quantity of additive in food contact material | |
| CN1904591A (en) | Determining method of artemislnin content in artemisia apiacea | |
| CN111239268B (en) | Method for determining amide compounds in environmental water sample by solid-phase extraction-liquid chromatography | |
| CN106918654A (en) | The assay method of macroreticular resin residual solvent in a kind of plus ginseng piece | |
| CN109856255B (en) | Analysis method for controlling isomer impurity content of ticagrelor intermediate | |
| CN105181858A (en) | Impurity-absorbing purifying column as well as preparation method and application thereof | |
| Zhang et al. | Selective and sensitive determination of protoberberines by capillary electrophoresis coupled with molecularly imprinted microextraction | |
| CN1958650A (en) | Molecular engram polymer of vinblastine, and preparation method | |
| CN104535693A (en) | Content detection method of gamithromycin | |
| CN111574574B (en) | Method for purifying doxorubicin | |
| CN103926334A (en) | Method for detecting residual organic solvents in medicines by high performance liquid chromatography | |
| CN104569265B (en) | Quality detection method of wine for relaxing muscles and tendons and treating rheumatism | |
| CN102998393A (en) | Determination method of content of calycosin glucoside in stable pulvis for strengthening body resistance and detoxifcation | |
| CN104931607A (en) | Content measurement method for Lingqijia oral solution | |
| CN101028474A (en) | Method for inspecting the quality of Chinese preparation with Yang-and kidney tonifying functions | |
| CN113466371A (en) | Method for measuring trace diisopropyl ether in phenol water | |
| CN102128904B (en) | Method for detecting residual organic solvent in mecobalamin | |
| CN101062031A (en) | Method of controlling the quality of silymarin oral aolid preparation | |
| CN103869026B (en) | The preprocess method of mulberry leaf compound preparation and the detection method of 1-DNJ | |
| CN101062394A (en) | Method for detecting the quality of pill for strengthening spleen and intestines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060802 Termination date: 20150822 |
|
| EXPY | Termination of patent right or utility model |