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:
- Pitavastatin Impurity 24 Sodium Salt
- CAS:
- 1980814-90-1
- MF:
- C25H24FNO6
- Structure:
- Chemical Name:
- (3S,5S)-tert-butyl 7-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-3,5-dihydroxyheptanoate
- CAS:
- 1428118-12-0
- MF:
- C37H43FN2O5
- Chemical Name:
- Ibubinib impurity
- Structure:
- Chemical Name:
- Amoxicillin EP Impurity K
- MF:
- C16H19N3O5S
- Structure:
- Chemical Name:
- Amoxicillin EP Impurity C
- CAS:
- 2088961-37-7
- MF:
- C16H19N3O5S
- Structure:
- Chemical Name:
- Amoxicillin EP Impurity C
- CAS:
- 2088961-37-7
- MF:
- C16H19N3O5S
- Structure:
- Chemical Name:
- Amoxicillin EP Impurity C
- CAS:
- 2088961-37-7
- MF:
- C16H19N3O5S
- Structure:
- Chemical Name:
- Oseltamivir Impurity
- CAS:
- 212504-89-7
- MF:
- C14H26N2O3
- Chemical Name:
- Tofacitinib Impurity QTD
- Chemical Name:
- LCZ696（valsartan + sacubitril） impurity 26
- Chemical Name:
- Cabozantinib impurity 31
- Structure:
- Chemical Name:
- Carvedilol Impurity COH
- CAS:
- 51997-50-3
- MF:
- C15H13NO2
- Structure:
- Chemical Name:
- Pregabalin Impurity 10
- CAS:
- 69680-50-8
- MF:
- C7H11NO3
- Chemical Name:
- Butyphthalide impurity 51
- Chemical Name:
- Canagliflozin Impurity 41
- Chemical Name:
- Pitavastatin Impurity 36
- Chemical Name:
- Pralatrexate Impurity 11
- Chemical Name:
- Pralatrexate Impurity 16
- Chemical Name:
- Pitavastatin Impurity 48
- Chemical Name:
- Pitavastatin Impurity 53
- Chemical Name:
- Lenvatinib Impurity 39
- CAS:
- 2664101-53-3
- Chemical Name:
- Tazobactam Impurity 10
- Chemical Name:
- Crisaborole Impurity 1
- Chemical Name:
- Canagliflozin Impurity 57
- Chemical Name:
- Canagliflozin Impurity 62
- Chemical Name:
- Apixaban Degradation of Impurity
- Chemical Name:
- Levetiracetam Impurity 22
- Structure:
- Chemical Name:
- Nifekalant Impurity 8
- Chemical Name:
- Levosimendan Impurity 9
- Chemical Name:
- Cabozantinib impurity J
- Chemical Name:
- Mixture of Pemetrexed disodium EP Impurity B and C
- Chemical Name:
- Rotigotine Impurity 3
- Structure:
- Chemical Name:
- Crisaborole Impurity 5
- CAS:
- 2141947-89-7
- MF:
- C20H20BNO4
- Chemical Name:
- Crisaborole Impurity 10
- Structure:
- Chemical Name:
- 1-(3-amino-4-(benzyloxy)phenyl)-2-((1-(4-methoxyphenyl)propan-2-yl)amino)ethan-1-ol
- CAS:
- 345288-56-4
- MF:
- C25H30N2O3
- Chemical Name:
- Olprinone Impurity 4
- Structure:
- Chemical Name:
- Ribavirin Impurity 55
- CAS:
- 119240-35-6
- MF:
- C11H16O8
- Chemical Name:
- Cilastatin Impurity 4
- Structure:
- Chemical Name:
- Dyclonine Impurity 3
- CAS:
- 14146-86-2
- MF:
- C24H28O4
- Chemical Name:
- Brivaracetam Impurity F
- Chemical Name:
- MeropeneM iMpurity 4
- Chemical Name:
- Perindopril IMpurity 4
- Structure:
- Chemical Name:
- Rupatadine Impurity 7
- CAS:
- 1704730-21-1
- MF:
- C26H26ClN3O
- Structure:
- Chemical Name:
- ethyl 3-(dimethylamino)-2-(4-methoxyphenyl)propanoate hydrochloride
- CAS:
- 2174001-92-2
- MF:
- C14H22ClNO3
- Chemical Name:
- Flucloxacillin Impurity 3
- Chemical Name:
- Nitrendipine iMpurity F
- Chemical Name:
- Afatinib Impurity 52
- Chemical Name:
- Afatinib Impurity 67
- Chemical Name:
- Empagliflozin Impurity 60
- Chemical Name:
- Linagliptin Impurity 57
- Chemical Name:
- Linagliptin Impurity 62
- Chemical Name:
- Metronidazole Impurity 12
- Chemical Name:
- Nintedanib Impurity 36
- Chemical Name:
- Oseltamivir Impurity 47
- Structure:
- Chemical Name:
- 1-(4-AMinophenyl)-5,6-dihydro-3-(4-Morpholinyl)-2(1h)-pyridinone
- CAS:
- 1267610-26-3
- MF:
- C15H19N3O2
- Structure:
- Chemical Name:
- Erlotinib IMpurity C
- CAS:
- 1312937-41-9
- MF:
- C15H20N2O5
- Structure:
- Chemical Name:
- Cinacalcet IMpurity
- CAS:
- 1229224-93-4
- MF:
- C22H26F3N
- Structure:
- Chemical Name:
- SalMeterol iMpurity
- CAS:
- 144391-74-2
- MF:
- C25H37NO4
- Chemical Name:
- AzithroMycin iMpurity R
- Chemical Name:
- ceftazidiMe iMpurity E
- Structure:
- Chemical Name:
- CefuroxiMe Axetil iMpurity C
- CAS:
- 76598-06-6
- MF:
- C18H15Cl3N4O9S
- Chemical Name:
- Rupatadine iMpurity D
- Chemical Name:
- Palbociclib Impurity 67
- Chemical Name:
- Pimecrolimus Impurity 3
- Chemical Name:
- Rosuvastatin Impurity 82
- Chemical Name:
- Tenofovir Impurity 76
- Chemical Name:
- Ticagrelor Impurity 125
- Chemical Name:
- Ticagrelor Impurity 39
- Chemical Name:
- Tofacitinib Impurity 109
- Chemical Name:
- Tofacitinib Impurity 114
- Structure:
- Chemical Name:
- Vildagliptin Impurity 34
- CAS:
- 1824265-77-1
- MF:
- C10H17NO3
- Structure:
- Chemical Name:
- 1-(3-(benzyloxy)-5-hydroxyphenyl)-2-(tert-butylamino)ethan-1-one
- CAS:
- 2459974-72-0
- MF:
- C19H23NO3
- Structure:
- Chemical Name:
- Demeclocycline EP Impurity C
- CAS:
- 129044-45-7
- MF:
- C21H22N2O8
- Chemical Name:
- Brimonidine Impurity D
- Chemical Name:
- Esmolol impurity D
- Chemical Name:
- Diquafosol Impurity D
- Chemical Name:
- Afatinib Impurity 10
- Chemical Name:
- Peramivir Impurity 11
- Chemical Name:
- Vildagliptin Impurity 6
- Chemical Name:
- Sunitinib Impurity 1
- Chemical Name:
- Erlotinib Impurity 18
- Structure:
- Chemical Name:
- Fasudil Impurity 6
- CAS:
- 1581642-06-9
- MF:
- C14H18ClN3O2S
- Chemical Name:
- Rosuvastatin Impurity 56
- Chemical Name:
- Dapoxetine Impurity 4
- Chemical Name:
- Ticagrelor Impurity 17
- Chemical Name:
- Empagliflozin Impurity 13
- Chemical Name:
- Moxifloxacin Impurity 2
- Chemical Name:
- Cabozantinib Impurity 1
- Chemical Name:
- Febuxostat Impurity 56
- Chemical Name:
- Acyclovir Impurity 1
- Chemical Name:
- Ambroxol Impurity 9 HCl
- Chemical Name:
- Penicillin Impurity A
- Chemical Name:
- Cefminox Sodium impurity A
- Chemical Name:
- Cefotiam Impurity A
- Chemical Name:
- pranoprofen impurity 25
- Structure:
- Chemical Name:
- Flavomarein，2R-3',4',8-Trihydroxyflavanone-7-O-glucoside
- CAS:
- 56389-87-8
- MF:
- C21H22O11
- Chemical Name:
- Peramivir Impurity D
- Chemical Name:
- Lincomycin sulfoxide Impurity 2
- Chemical Name:
- Lincomycin sulfoxide Impurity E
- Chemical Name:
- Fasudil iMpurity E