Standard
In the analysis work, it often demanded to apply high-quality compound with the exact content being accurate in order to be compared as the detection control or used to calibrate the instrument, the compound is known as standard sample.
Standard refers to the standard substance used for measuring the potency of biological products. When the production department submits to a higher authority for approval of the quality standard of the biological product, they should also provide the standard sample (indicated in unit (μ)) used for measuring the potency of the tested product.
According to different application, the verification products can be divided into biological standard for the testing of biological products, endocrine drugs, antibiotics and other bioassay and chemical standards including:
1 chemical standards used for calibration of the instrument;
2 chemical reference standards used for calibration of the ultraviolet or infrared spectrum of the drugs;
3 control standards used for the purity test of drugs as well as the impurity control or as the control standards for content determination of the medicine.
In the page 67 of the appendix in the People's Republic of China Pharmacopoeia 1990 1st edition, we can find hundreds kinds of standards including bornyl ester acetate, eugenol and panaxadiol as well as 39 kinds of control medicine for the purify inspection of traditional Chinese medicine, impurity control or the content determination.
International standards
This refers to standard sample, with the potency units of the existing international standard sample potency units as baseline, undergoing further calibration of its potency units on the basis of a wide range of international cooperation. Its potency is expressed in 1U. For a certain product, for the establishment of the first international standard sample, the determination of its potency units should be consulted and decided by the Committee of Experts before the announcement. The international standard is a standard reference substance for worldwide preparation of national standards, so that the international standards can achieve unity.
Reagents and standards
All reagents in the food analysis laboratories should be clearly labeled to indicate the following: 1 name; 2 the date of preparation; 3 Signature from the people in charge; 4 if necessary, we need to add content such as safety and validity and so on.
Most food analysis should use standard sample as reference for qualitative and quantitative determination. The standard sample should be classified according to the following classification methods: 1 international standard; 2 national standards; 3 internal standard; 4 other standards.
Receptacle for reference standards should be clearly affixed to the label, to indicate the following: 1 name; 2 standard document number; 3 Opening times; 4 Validity; 5 Signature.
In addition, the laboratory should keep all the necessary specific files for all the necessary reference standards.
Capacity analysis standard solution should also be strictly managed. It should be clearly posted on all the standard solution containers with labels to indicate: 1 name; 2 concentration; 3 formulation date; 4 No of formulated procedures; 5 storage conditions; 6 validity; 7 Signature from people in charge.
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- Structure:
- Chemical Name:
- Benzonitrile, 4-[(1E)-4-(dimethylamino)-1-(4-fluorophenyl)-1-buten-1-yl]-3-(hydroxymethyl)-
- CAS:
- 1370643-23-4
- MF:
- C20H21FN2O
- Chemical Name:
- Latamoxef impurity B
- Structure:
- Chemical Name:
- (9alpha,13alpha,14alpha)-3-methoxymorphinan-17-carbaldehyde
- CAS:
- 28973-48-0
- MF:
- C18H23NO2
- Structure:
- Chemical Name:
- 2-[(5-CARBOXY-4-METHOXY-3-METHYLPYRID-2-YL)-METHYLSULFO]-5-METHOXYBENZIMIDAZOLE
- CAS:
- 120003-72-7
- MF:
- C17H17N3O5S
- Structure:
- Chemical Name:
- 3-(7,8-dimethoxy-2-oxo-1,2,4,5-tetrahydro-3H-benzo[d]azepin-3-yl)-N-(((S)-3,4-dimethoxybicyclo[4.2.0]octa-1(6),2,4-trien-7-yl)methyl)-N-methylpropan-1-amine oxide
- CAS:
- 2511244-97-4
- MF:
- C27H36N2O6
- Structure:
- Chemical Name:
- 2,4,6,3',5'-pentamethoxybiphenyl
- CAS:
- 84212-55-5
- MF:
- C17H20O5
- Structure:
- Chemical Name:
- 2-benzoyl-N-(2-hydroxyethyl)-N-methylbenzamide
- CAS:
- 24833-47-4
- MF:
- C17H17NO3
- Chemical Name:
- Labetalol EP Impurity I
- Chemical Name:
- (Asp4)-Carbetocin (Impurity G)
- Structure:
- Chemical Name:
- Sulfamide, N-[5-(4-bromophenyl)-6-[2-[(5-chloro-2-pyrimidinyl)oxy]ethoxy]-4-pyrimidinyl]-N'-propyl-
- CAS:
- 2443747-63-3
- MF:
- C19H20BrClN6O4S
- Structure:
- Chemical Name:
- methyl 3-oxo1,2-benzisothiazole-2(3H)-acetate 1,1-dioxide
- CAS:
- 6639-62-9
- MF:
- C10H9NO5S
- Structure:
- Chemical Name:
- (6R-cis)-3-(hydroxymethyl)-7-methoxy-8-oxo-7-(2-thienylacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
- CAS:
- 54333-94-7
- MF:
- C15H16N2O6S2
- Structure:
- Chemical Name:
- 5-acetyl-1,3-phenylene bis(dimethylcarbamate)
- CAS:
- 81732-48-1
- MF:
- C14H18N2O5
- Chemical Name:
- Oseltamivir Impurity L
- Structure:
- Chemical Name:
- 1,4-Naphthalenediol, 2-methyl-, 4-acetate
- CAS:
- 110327-29-2
- MF:
- C13H12O3
- Chemical Name:
- Oseltamivir Impurity 105
- Chemical Name:
- Oseltamivir Impurity 77
- Chemical Name:
- Imidapril Impurity 2
- Structure:
- Chemical Name:
- Betamethasone EP Impurity G
- CAS:
- 85700-75-0
- MF:
- C22H30O5
- Chemical Name:
- Crisaborole Impurity ABCDEFGHJKL
- Structure:
- Chemical Name:
- 3-Azetidinecarboxylic acid, 1-[(4-acetyl-2-ethylphenyl)methyl]-
- CAS:
- 2474774-17-7
- MF:
- C15H19NO3
- Structure:
- Chemical Name:
- 1-chloro-3-(chlorophenylmethyl)benzene
- CAS:
- 13391-39-4
- MF:
- C13H10Cl2
- Structure:
- Chemical Name:
- 2,3'-Bipyridine, 5-chloro-3-[4-(methylsulfonyl)phenyl]-, hydrochloride (1:1)
- CAS:
- 202409-39-0
- MF:
- C17H14Cl2N2O2S
- Structure:
- Chemical Name:
- 2-Pyridinecarbonitrile, 5-isocyanato-3-(trifluoromethyl)-
- CAS:
- 1950587-21-9
- MF:
- C8H2F3N3O
- Chemical Name:
- 1,1'-((methylenebis(4-methoxy-3,1-phenylene))bis(2-(dimethylamino)ethane-1,1-diyl))dicyclohexanol
- Structure:
- Chemical Name:
- Apalutamide Desfluoro Impurity
- CAS:
- 1332389-57-7
- MF:
- C21H16F3N5O2S
- Structure:
- Chemical Name:
- 1-[4-(2-AZEPAN-1-YL-ETHOXY)-BENZYL]-5-BENZYLOXY-2-(4-BENZYLOXY-PHENYL)-3-METHYL-1H-INDOLE
- CAS:
- 198480-21-6
- MF:
- C44H46N2O3
- Structure:
- Chemical Name:
- 6-Heptenoic acid, 7-[2-cyclopropyl-4-(4-fluorophenyl)-3-quinolinyl]-3,5-dihydroxy-, 1,1-dimethylethyl ester, (3S,5R,6E)-
- CAS:
- 2273873-66-6
- MF:
- C29H32FNO4
- Structure:
- Chemical Name:
- 2H-1,4-Benzoxazin-3(4H)-one, 8-(2-chloro-1-hydroxyethyl)-6-(phenylmethoxy)-
- CAS:
- 2383660-53-3
- MF:
- C17H16ClNO4
- Chemical Name:
- Isavuconazole Impurity 40
- Structure:
- Chemical Name:
- 2,3'-Bipyridine, 5-chloro-6'-methyl-3-[4-(methylsulfonyl)phenyl]-, 1,1'-dioxide
- CAS:
- 2724840-93-9
- MF:
- C18H15ClN2O4S
- Chemical Name:
- Vitamin K1 Impurity C
- Chemical Name:
- 4-(8-chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-1-((5-methylpyridin-3-yl)methyl)piperidine 1-oxide
- Structure:
- Chemical Name:
- 1,3-Dioxo-2-isoindolineaceticacid
- CAS:
- 6296-53-3
- MF:
- C10H7NO4
- Structure:
- Chemical Name:
- 1-(4-Bromo-2-(hydroxymethyl)phenyl)-4-(dimethylamino)-1-(4-fluorophenyl)butan-1-olhydrochloride
- CAS:
- 488148-10-3
- MF:
- C19H23BrFNO2
- Chemical Name:
- Bisoprolol Impurity 42
- Chemical Name:
- Peramivir Impurity 31(R)
- Chemical Name:
- Roxatidine Impurity 10
- Chemical Name:
- 2-methyl-4-(((2E,6E,10E)-3,7,11,15-tetramethylhexadeca-2,6,10,14-tetraen-1-yl)oxy)naphthalen-1-ol
- Structure:
- Chemical Name:
- 2H-Pyrido[3,4-h]-1,4-benzoxazin-3(4H)-one, 7,8,9,10-tetrahydro-6,10-dihydroxy-8-[2-(4-methoxyphenyl)-1,1-dimethylethyl]-
- CAS:
- 2727170-18-3
- MF:
- C22H26N2O5
- Structure:
- Chemical Name:
- Vildagliptin Chloroacetyl Nitrile (R)-Isomer
- CAS:
- 565452-98-4
- MF:
- C7H9ClN2O
- Chemical Name:
- Nirmatrelvir Impurity 5
- Chemical Name:
- Brivaracetam Impurity 119
- Chemical Name:
- Perospirone Impurity 27
- Chemical Name:
- Paxlovid Impurity 11
- Chemical Name:
- 3-(2-(cyclopent-3-en-1-yl)-2-hydroxy-2-phenylacetoxy)-1,1-dimethylpyrrolidin-1-ium bromide
- Chemical Name:
- Timolol maleate impurity 02
- Chemical Name:
- Olodaterol Impurity 26
- Structure:
- Chemical Name:
- 2H-3-Benzazepin-2-one, 3-[3-[[(2S)-3-chloro-2-(3,4-dimethoxyphenyl)propyl]methylamino]propyl]-1,3,4,5-tetrahydro-7,8-dimethoxy-
- CAS:
- 2768438-46-4
- MF:
- C27H37ClN2O5
- Chemical Name:
- Ethacridine Impurity 5
- CAS:
- 869002-00-6
- Chemical Name:
- Olodaterol Impurity 29
- Chemical Name:
- Elagolix Impurity 40
- Structure:
- Chemical Name:
- Bezafibrate Impurity D
- CAS:
- 41859-58-9
- MF:
- C21H24ClNO4
- Structure:
- Chemical Name:
- Cloxacillin Sodium EP Impurity B (Mixture of Diastereomers)
- CAS:
- 1642559-64-5
- MF:
- C18H20ClN3O4S
- Structure:
- Chemical Name:
- Ezetimibe Related Impurity 37
- CAS:
- 204589-68-4
- MF:
- C24H19F2NO2
- Structure:
- Chemical Name:
- S, R-Isovalganciclovir Impurity
- CAS:
- 1356932-18-7
- MF:
- C14H22N6O5
- Structure:
- Chemical Name:
- Sofosbuvir Impurity 8
- CAS:
- 944476-44-2
- MF:
- C24H22N2O8
- Structure:
- Chemical Name:
- 135270-13-2
- CAS:
- 135270-13-2
- MF:
- C12H11F2N3O
- Chemical Name:
- NA
- Chemical Name:
- Empagliflozin Impurity 116
- Chemical Name:
- (3R,5aS)-5,8-dioxooctahydro-5H-pyrrolo[1,2-a]thiazolo[3,2-d]pyrazine-3-carboxylic acid
- Chemical Name:
- Phospholipid Impurity 1(DPPE-MPEG5000 Impurity 1)
- Chemical Name:
- Carbazochrome Sodium Sulfonate Impurity 4
- Chemical Name:
- Empagliflozin Furanose Impurity
- Chemical Name:
- Rosuvastatin Impurity 144
- Chemical Name:
- Cetrorelix Impurity 11
- Chemical Name:
- Cetrorelix Impurity 4 (8-D-Arg)
- Chemical Name:
- Cetrorelix Impurity 1 (+L-Arg)
- Chemical Name:
- Peramivir Intermediate Impurity 36
- Chemical Name:
- Peramivir Intermediate Impurity 41
- Chemical Name:
- Peramivir Impurity 999
- Chemical Name:
- Palonosetron impurity 20XH
- Chemical Name:
- Apixaban Impurity 89
- Chemical Name:
- Levofloxacin benzopazine impurity
- Chemical Name:
- Bumetanide Impurity 14
- Chemical Name:
- Sugammadex Sodium Impurity 08
- Structure:
- Chemical Name:
- INDEX NAME NOT YET ASSIGNED
- CAS:
- 2412953-12-7
- MF:
- C72H112O49S8
- Structure:
- Chemical Name:
- 4a(2H)-Isoquinolinol, octahydro-4-(4-methoxyphenyl)-2-methyl-
- CAS:
- 2568340-30-5
- MF:
- C17H25NO2
- Structure:
- Chemical Name:
- 3-Quinolinecarbonitrile, 4-[(2,4-dichloro-5-hydroxyphenyl)amino]-6-methoxy-7-[3-(4-methyl-1-piperazinyl)propoxy]-
- CAS:
- 2468737-92-8
- MF:
- C25H27Cl2N5O3
- Structure:
- Chemical Name:
- Uridine, 4-oxime, 5'-(2-methylpropanoate), (4E)-
- CAS:
- 2492423-30-8
- MF:
- C13H19N3O7
- Chemical Name:
- Empagliflozin Furanose Impurity
- Chemical Name:
- Tazobactam Impurity XTE
- Chemical Name:
- Isavuconazole Impurity 46
- Structure:
- Chemical Name:
- 5-(1-((5,6-diethyl-2,3-dihydro-1H-inden-2-yl)amino)-2-hydroxyethyl)-8-hydroxyquinolin-2(1H)-one
- CAS:
- 2226428-25-5
- MF:
- C24H28N2O3
- Structure:
- Chemical Name:
- INDEX NAME NOT YET ASSIGNED
- CAS:
- 2740235-22-5
- MF:
- C13H22N2O5
- Structure:
- Chemical Name:
- 2-(4-ethylpiperazin-1-yl)-4-(2-fluorophenyl)-5,6,7,8,9,10-hexahydrocycloocta[b]pyridine
- MF:
- C23H30FN3
- Structure:
- Chemical Name:
- 1-Naphthalenamine, 4-(2,3-dichlorophenyl)-1,2,3,4-tetrahydro-N-methyl-, (1R,4S)-rel-
- CAS:
- 2184053-08-3
- MF:
- C17H17Cl2N
- Chemical Name:
- Rosuvastatin Impurity 152
- Chemical Name:
- Fondaparinux sodium impurity 19
- Chemical Name:
- Avatrombopag Impurity 59
- Chemical Name:
- Lasmiditan Impurity 3
- Chemical Name:
- Olaparib Adduct Impurity
- Chemical Name:
- 8-chloro-11-(piperidin-4-ylidene)-11H-benzo[5,6]cyclohepta[1,2-b] pyridine
- CAS:
- 2514965-36-5
- Chemical Name:
- Febuxostat impurity EOX
- Structure:
- Chemical Name:
- 2-METHYL-4-HYDROXY-2H-1,2-BENZOTHIAZINE-3-CARBOXYLIC METHYL ESTER-1,1-DIOXIDE
- CAS:
- 35511-15-0
- MF:
- C11H11NO5S