CN103776917A - Method for testing TFA in mifepristone - Google Patents
Method for testing TFA in mifepristone Download PDFInfo
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- CN103776917A CN103776917A CN201310569647.1A CN201310569647A CN103776917A CN 103776917 A CN103776917 A CN 103776917A CN 201310569647 A CN201310569647 A CN 201310569647A CN 103776917 A CN103776917 A CN 103776917A
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Abstract
The invention discloses a method for testing TFA (Trifluoroacetic Acid) in mifepristone. The method adopts gas chromatography, selects a capillary column, and uses an ECD as a detector and sulfuric acid-methanol, dimethyl sulfate and iodomethane as methyl esterification reagents, and the TFA is subjected to methyl esterification to generate a TFA methyl ester suitable for headspace sampling. Compared with the prior art, the method can be used for testing the content of the TFA in mifepristone.
Description
Technical field
The present invention relates to Pharmaceutical Analysis technology, more specifically, relate to the method for TFA content in a kind of gas chromatography determination mifepristone.
Background technology
TFA is a kind of extremely strong acid organic acid, has a lot of inorganicss and organic ability simultaneously, makes it to have excellent reactivity worth, thus at medicine, agricultural chemicals, fuel, amino acid protection, organic synthesis, the fields such as material processed are widely used.Intermediate as fluorine-containing medicines, agricultural chemicals and dyestuff is excellent active because trifluoromethyl group shows in fluorine-containing medicines, agricultural chemicals, dyestuff, and TFA is as the primary raw material of introducing trifluoromethyl group.
Mifepristone is a kind of antiprogestin class medicine, and its mechanism of action is: be combined with PgR in competitive mode performance antiprogestin effect.Mifepristone has termination of early pregnancy, anti-implantation, induction menstruation and the effect of promotion cervix maturation.
Owing to can existing in mifepristone preparation process, TFA's is residual, stipulate according to " Chinese Pharmacopoeia ", TFA is divided into the 4th kind solvent that there is no enough toxicological informations, should be according to the feature of production technology, formulate corresponding limit, make it meet product specification, GMP (GMP) or other basic quality requirementss.
The method of existing detection TFA:
1), after medicine being carried out to oxygen bottle burning and destroying, measure fluorine with Colorimetry, then be converted into the method for TFA content.
2) chromatography of ions, principle is to utilize TFA to be different from the conductivity of other negative ion, uses conductance cell detecting device to carry out quantitative and qualitative analysis to TFA.
Compared with the conventional method, this method can be avoided using method 1, causes the interference of fluorine element to testing result in molecular structure, can also reach the detection sensitivity higher compared with method 2.
Summary of the invention
The object of invention is to provide a kind of method of measuring TFA content in mifepristone with gc analysis, can be used for the quality control of product in mifepristone.
The invention provides a kind of method with TFA content in gas chromatography determination mifepristone, adopt capillary column, take ECD as detecting device, sulfuric acid-methyl alcohol or dimethyl suflfate-methyl alcohol, iodomethane-methyl alcohol are solvent.
The invention provides a kind of method with TFA content in gas chromatography determination mifepristone, the concentration that wherein volume ratio of solvent sulfuric acid-methyl alcohol is is 1 ~ 12:99 ~ 88, the concentration that the volume ratio of dimethyl suflfate-methyl alcohol is is 0.5 ~ 6:99.5 ~ 94, and the concentration that the volume ratio of iodomethane-methyl alcohol is is 0.5 ~ 6:99.5 ~ 94.
The invention provides a kind of method with TFA content in gas chromatography determination mifepristone, the concentration that wherein volume ratio of solvent sulfuric acid-methyl alcohol is is 10:90, the concentration that the volume ratio of dimethyl suflfate-methyl alcohol is is 5:95, and the concentration that the volume ratio of iodomethane-methyl alcohol is is 5:95.
The invention provides a kind of method with TFA content in gas chromatography determination mifepristone, the temperature of wherein said esterification is 60 ~ 85 ℃.
The invention provides a kind of method with TFA content in gas chromatography determination mifepristone, wherein the temperature of headspace sampling sample introduction head space bottle is 45 ~ 55 ℃.
The invention provides a kind of method with TFA content in gas chromatography determination mifepristone, comprise the steps:
1) get test sample in right amount to headspace sampling bottle, add sulfuric acid-methyl alcohol or dimethyl suflfate-methyl alcohol, iodomethane-dissolve with methanol solution is made the sample solution of every 1ml containing test sample 10mg;
2) the head space bottle after gland is put to 60 ~ 85 ℃ of heating water baths and derived for 60 minutes, preferably 80 ℃ of water-baths;
3) column temperature is set and is initially 60 ℃, keep 10 minutes, then rise to 235 ℃ with the speed of 40 ℃ of per minute intensifications, keep 5 minutes; Injector temperature is 140 ℃; Detecting device is ECD; Detector temperature is 250 ~ 350 ℃, and optimum temperature is 350 ℃; Chromatographic column is DB-624 capillary column;
4) when headspace sampling, the temperature of head space bottle is 45 ~ 55 ℃, and optimum temperature is 55 ℃;
5) extract head space bottle upper gas 0.1 ~ 1.0ml, be preferably 0.1ml, inject gas chromatograph completes the mensuration of sample TFA content.
In said method, the volume ratio of sulfuric acid-methyl alcohol is 1 ~ 12:99 ~ 88, preferably 10:90, and the volume ratio of dimethyl suflfate-methyl alcohol is 0.5 ~ 6:99.5 ~ 96, preferably 5:95, the volume ratio of iodomethane-methyl alcohol is 0.5 ~ 6:99.5 ~ 96, preferably 5:95.
The invention provides a kind of method with TFA content in gas chromatography determination mifepristone, comprise the steps:
1) get test sample in right amount to headspace sampling bottle, add sulfuric acid-dissolve with methanol solution and make the sample solution of every 1ml containing test sample 10mg;
2) the head space bottle after gland is put to 80 ℃ of heating water baths derives for 60 minutes;
3) column temperature is set and is initially 60 ℃, keep 10 minutes, then rise to 235 ℃ with the speed of 40 ℃ of per minute intensifications, keep 5 minutes; Injector temperature is 140 ℃; Detecting device is ECD; Detector temperature is 350 ℃, and chromatographic column is DB-624 capillary column;
4), when headspace sampling, the temperature of head space bottle is 55 ℃;
5) extract head space bottle upper gas 0.1ml, inject gas chromatograph completes the mensuration of sample TFA content.
In said method, the volume ratio of sulfuric acid methyl alcohol is 10:90, and the volume ratio of dimethyl suflfate-methyl alcohol is 5:95, and the volume ratio of iodomethane-methyl alcohol is 5:95.
After jasmine discloses medicine is carried out to the burning of oxygen bottle and destroys, measure fluorine with Colorimetry, then be converted into the method for TFA content.(West China Journal of Pharmaceutical Sciences 2001,16(6): 427 ~ 428) the method is destroyed sample with the burning of oxygen bottle, makes the fluorine in TFA become inorganic fluorion, measure fluorine with Colorimetry, be converted into again the amount of TFA, but the method use there is limitation.Should be the method will carry out oxygen bottle burning destruction to sample, is only applicable to not contain in drug molecular structure the organic compound of fluorine element, if contain fluorine element in test compound molecule, cannot detect it.Detection method provided by the invention, has improved the specificity of measuring, and has avoided the interference to test findings of the fluorine element that contains in molecular structure.
Accompanying drawing explanation: the gas chromatogram that Fig. 1 is sulfuric acid-methyl alcohol;
Fig. 2 is that TFA is through derivative gas chromatogram;
Fig. 3 is the gas chromatogram of TFA methyl esters;
Fig. 4 is the gas chromatogram of sample 1;
Fig. 5 is the gas chromatogram of sample 2.
Form is described in further detail content of the present invention more by the following examples, but should not be interpreted as in the above-mentioned subject area of the present invention at this point and only limit to following examples.Do not departing under the above-mentioned technology prerequisite of the present invention, the corresponding replacement of making according to ordinary skill knowledge and customary means or the modification of change, include within the scope of the invention
.
Embodiment 1
Instrument and condition
Clarus500GC type gas chromatograph is joined ECD detecting device, Turbomatrix40 type head-space sampler, DB-624 quartz capillary column chromatographic column.
Chromatographic condition: column temperature is initially 60 ℃, keeps 10 minutes, then rises to 235 ℃ with the speed of 40 ℃ of per minute intensifications, keeps 5 minutes; Sample introduction temperature: 140 ℃; Detecting device: ECD; Detector temperature: 350 ℃; Carrier gas: N
2.
Head space condition: furnace temp: 55 ℃, sample size 0.1ml.
Test procedure:
Precision adds in 10% sulfuric acid-methanol solution 2ml top set empty bottle, and sealing, as need testing solution;
Head space bottle after gland is put to 80 ℃ of heating water baths and within 60 minutes, derive, place room temperature;
Get test sample and carry out gas phase analysis according to above-mentioned condition, record chromatogram, there is no chromatographic peak in going out on peak position of TFA methyl esters, the results are shown in Figure 1.
Embodiment 2
Instrument and condition
Clarus500GC type gas chromatograph is joined ECD detecting device, Turbomatrix40 type head-space sampler, DB-624 quartz capillary column chromatographic column.
Chromatographic condition: column temperature is initially 60 ℃, keeps 10 minutes, then rises to 235 ℃ with the speed of 40 ℃ of per minute intensifications, keeps 5 minutes; Sample introduction temperature: 140 ℃; Detecting device: ECD; Detector temperature: 350 ℃; Carrier gas: N
2.
Head space condition: furnace temp: 55 ℃, sample size 0.1ml.
Test procedure:
Precision adds in the 10% sulfuric acid-methanol solution 2ml top set empty bottle that contains TFA4.0ug/ml to be made it to dissolve, and sealing, as need testing solution;
Head space bottle after gland is put to 80 ℃ of heating water baths and within 60 minutes, derive, place room temperature;
Get test sample and carry out gas phase analysis according to above-mentioned condition, record chromatogram, the chromatographic peak that retention time is 6.18min is that TFA process is derivative, and the chromatographic peak of the TFA methyl esters of generation, the results are shown in Figure 2.
Embodiment 3
Instrument and condition
Clarus500GC type gas chromatograph is joined ECD detecting device, Turbomatrix40 type head-space sampler, DB-624 quartz capillary column chromatographic column.
Chromatographic condition: column temperature is initially 60 ℃, keeps 10 minutes, then rises to 235 ℃ with the speed of 40 ℃ of per minute intensifications, keeps 5 minutes; Sample introduction temperature: 140 ℃; Detecting device: ECD; Detector temperature: 350 ℃; Carrier gas: N
2.
Head space condition: furnace temp: 55 ℃, sample size 0.1ml.
Test procedure:
Precision adds the methanol solution 2ml that contains TFA methyl esters 1ug/ml, makes it to dissolve in top set empty bottle, and sealing, as need testing solution;
Get test sample and carry out gas phase analysis according to above-mentioned condition, record chromatogram, the chromatographic peak that retention time is 6.21min is the chromatographic peak of TFA methyl esters, the results are shown in Figure 3.
Embodiment 4
Instrument and condition
Clarus500GC type gas chromatograph is joined ECD detecting device, Turbomatrix40 type head-space sampler, DB-624 quartz capillary column chromatographic column.
Chromatographic condition: column temperature is initially 60 ℃, keeps 10 minutes, then rises to 235 ℃ with the speed of 40 ℃ of per minute intensifications, keeps 5 minutes; Sample introduction temperature: 140 ℃; Detecting device: ECD; Detector temperature: 350 ℃; Carrier gas: N
2.
Head space condition: furnace temp: 55 ℃, sample size 0.1ml.
Test procedure:
Get 20mg in test sample mifepristone, accurately weighed, precision adds in 10% sulfuric acid-methanol solution 2ml top set empty bottle to be made it to dissolve, and sealing, as need testing solution;
Head space bottle after gland is put to 80 ℃ of heating water baths and within 60 minutes, derive, place room temperature.
Get test sample and carry out gas phase analysis according to above-mentioned condition, record chromatogram, do not detect the derivative rear TFA methyl esters generating of TFA in going out on peak position of TFA methyl esters, the results are shown in Figure 4.
Embodiment 5
Instrument and condition
Clarus500GC type gas chromatograph is joined ECD detecting device, Turbomatrix40 type head-space sampler, DB-624 quartz capillary column chromatographic column.
Chromatographic condition: column temperature is initially 60 ℃, keeps 10 minutes, then rises to 235 ℃ with the speed of 40 ℃ of per minute intensifications, keeps 5 minutes; Sample introduction temperature: 140 ℃; Detecting device: ECD; Detector temperature: 350 ℃; Carrier gas: N
2.
Head space condition: furnace temp: 55 ℃, sample size 0.1ml.
Test procedure:
Get 19.8mg in test sample mifepristone, accurately weighed, precision adds in 10% sulfuric acid-methanol solution 2ml top set empty bottle to be made it to dissolve, and sealing, as need testing solution;
Head space bottle after gland is put to 80 ℃ of heating water baths and within 60 minutes, derive, place room temperature;
Get test sample and carry out gas phase analysis according to above-mentioned condition, record chromatogram, do not detect the derivative rear TFA methyl esters generating of TFA in going out on peak position of TFA methyl esters, the results are shown in Figure 5.
Embodiment 6
Instrument and condition
Clarus500GC type gas chromatograph is joined ECD detecting device, Turbomatrix40 type head-space sampler, DB-624 quartz capillary column chromatographic column.
Chromatographic condition: column temperature is initially 60 ℃, keeps 10 minutes, then rises to 235 ℃ with the speed of 40 ℃ of per minute intensifications, keeps 5 minutes; Sample introduction temperature: 140 ℃; Detecting device: ECD; Detector temperature: 350 ℃; Carrier gas: N
2.
Head space condition: furnace temp: 55 ℃, sample size 0.1ml.
Test procedure:
Get 20.8mg in test sample mifepristone, accurately weighed, precision adds in 5% dimethyl suflfate-methanol solution 2ml top set empty bottle to be made it to dissolve, and sealing, as need testing solution;
Head space bottle after gland is put to 80 ℃ of heating water baths and within 60 minutes, derive, place room temperature;
Get test sample and carry out gas phase analysis according to above-mentioned condition, record chromatogram, result does not detect the derivative rear TFA methyl esters generating of TFA.
Embodiment 7
Instrument and condition
Clarus500GC type gas chromatograph is joined ECD detecting device, Turbomatrix40 type head-space sampler, DB-624 quartz capillary column chromatographic column.
Chromatographic condition: column temperature is initially 60 ℃, keeps 10 minutes, then rises to 235 ℃ with the speed of 40 ℃ of per minute intensifications, keeps 5 minutes; Sample introduction temperature: 140 ℃; Detecting device: ECD; Detector temperature: 350 ℃; Carrier gas: N
2.
Head space condition: furnace temp: 55 ℃, sample size 0.1ml.
Test procedure:
Get 20.3mg in test sample mifepristone, accurately weighed, precision adds in 5% iodomethane-methanol solution 2ml top set empty bottle to be made it to dissolve, and sealing, as need testing solution;
Head space bottle after gland is put to 80 ℃ of heating water baths and within 60 minutes, derive, place room temperature;
Get test sample and carry out gas phase analysis according to above-mentioned condition, record chromatogram, result does not detect the derivative rear TFA methyl esters generating of TFA.
Claims (9)
1. a method for TFA content in gas chromatography determination mifepristone, is characterized in that the capillary column with DB-624, take ECD as detecting device, and sulfuric acid-methyl alcohol, dimethyl suflfate, iodomethane is methyl esterification reagent, sample is through insulation esterification, headspace sampling.
2. method according to claim 1, wherein, in solvent sulfuric acid-methanol solution, the concentration that the volume ratio of sulfuric acid and methyl alcohol is is 1 ~ 12:99 ~ 88, dimethyl suflfate-methyl alcohol 0.5 ~ 6:99.5 ~ 94, iodomethane-methyl alcohol 0.5 ~ 6:99.5 ~ 94.
3. method according to claim 2, wherein, the ratio of sulfuric acid and methyl alcohol is 10:90, dimethyl suflfate-methyl alcohol 5:95, iodomethane-methyl alcohol 5:95.
4. method according to claim 1, sample is through insulation esterification, and the temperature of esterification is 60 ~ 85 ℃.
5. method according to claim 4, wherein, the temperature of esterification is 80 ℃.
6. method according to claim 1, the sample headspace sample introduction after esterification, the temperature of sample introduction head space bottle is 45 ~ 55 ℃.
7. method according to claim 6, wherein, the temperature of the head space bottle of sample introduction is 50 ℃.
8. a method for TFA content in gas chromatography determination mifepristone, comprises the steps:
1) get test sample in right amount to headspace sampling bottle, add sulfuric acid-methyl alcohol or dimethyl suflfate-methyl alcohol, iodomethane-dissolve with methanol solution is made the sample solution of every 1ml containing test sample 10mg;
2) the head space bottle after gland is put to 60 ~ 85 ℃ of heating water baths and derived for 60 minutes, preferably 80 ℃ of water-baths;
3) column temperature is set and is initially 60 ℃, keep 10 minutes, then rise to 235 ℃ with the speed of 40 ℃ of per minute intensifications, keep 5 minutes; Injector temperature is 140 ℃; Detecting device is ECD; Detector temperature is 250 ~ 350 ℃, and optimum temperature is 350 ℃; Chromatographic column is DB-624 capillary column;
4) when headspace sampling, the temperature of head space bottle is 45 ~ 55 ℃, and optimum temperature is 55 ℃;
5) extract head space bottle upper gas 0.1 ~ 1.0ml, be preferably 0.1ml, inject gas chromatograph completes the mensuration of sample TFA content.
9. a method for TFA content in gas chromatography determination mifepristone, comprises the steps:
1) get test sample in right amount to headspace sampling bottle, add sulfuric acid-methyl alcohol or dimethyl suflfate-methyl alcohol, iodomethane-dissolve with methanol solution is made the sample solution of every 1ml containing test sample 10mg;
2) the head space bottle after gland is put to 80 ℃ of heating water baths derives for 60 minutes;
3) column temperature is set and is initially 60 ℃, keep 10 minutes, then rise to 235 ℃ with the speed of 40 ℃ of per minute intensifications, keep 5 minutes; Injector temperature is 140 ℃; Detecting device is ECD; Detector temperature is 350 ℃; Chromatographic column is DB-624 capillary column;
4), when headspace sampling, the temperature of head space bottle is 55 ℃;
5) extraction head space bottle upper gas 0.1ml inject gas chromatograph completes the mensuration of sample TFA content.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285227A (en) * | 2020-10-16 | 2021-01-29 | 华润紫竹药业有限公司 | Gas chromatography analysis method for hexafluoroacetone in mifepristone |
-
2013
- 2013-11-13 CN CN201310569647.1A patent/CN103776917A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| CHAD E.WUJCIK等: "Extraction and analysis of trifluoroacetic acid in environmental waters", 《ANAL.CHEM.》 * |
| 朱圣亮等: "柱前衍生化顶空气相色谱法同时检测非布司他原料药中3种微量有机酸", 《中国药房》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285227A (en) * | 2020-10-16 | 2021-01-29 | 华润紫竹药业有限公司 | Gas chromatography analysis method for hexafluoroacetone in mifepristone |
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Application publication date: 20140507 |