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 CAS MF
Disodium 2,2'-dihydroxy-4,4'-dimethoxy-5,5'-disulfobenzophenone Disodium 2,2'-dihydroxy-4,4'-dimethoxy-5,5'-disulfobenzophenone 76656-36-5 C15H12Na2O11S2
Mesterolone Mesterolone 1424-00-6 C20H32O2
Testosterone decanoate Testosterone decanoate 5721-91-5 C29H46O3
Testosterone isocaproate Testosterone isocaproate 15262-86-9 C25H38O3
4-Amino-TEMPO, free radical 4-Amino-TEMPO, free radical 14691-88-4 C9H19N2O*
Androsterone Androsterone 53-41-8 C19H30O2
4-Chloro-2-methylaniline 4-Chloro-2-methylaniline 95-69-2 C7H8ClN
Hydroxysafflor yellow A Hydroxysafflor yellow A 78281-02-4 C27H32O16
Metalaxyl-M Metalaxyl-M 70630-17-0 C15H21NO4
Vardenafil dihydrochloride Vardenafil dihydrochloride 224789-15-5 C23H33ClN6O4S
PALM OIL PALM OIL 8002-75-3
NEOTHORIN NEOTHORIN 3547-38-4 C16H11AsN2Na2O11S2
25-HYDROXYVITAMIN D2 25-HYDROXYVITAMIN D2 21343-40-8 C28H44O2
PHENTERMINE HYDROCHLORIDE PHENTERMINE HYDROCHLORIDE 1197-21-3 C10H16ClN
VALENCENE VALENCENE 4630-07-3 C15H24
(+/-)-alpha-Lipoamide (+/-)-alpha-Lipoamide 940-69-2 C8H15NOS2
Cellulose acetate phthalate Cellulose acetate phthalate 9004-38-0 C116H116O64
3-(4-METHYLBENZYLIDENE)CAMPHOR 3-(4-METHYLBENZYLIDENE)CAMPHOR 36861-47-9 C18H22O
(-)-COTININE (-)-COTININE 486-56-6 C10H12N2O
17-BETA-ESTRADIOL 3,17-DIPROPIONATE 17-BETA-ESTRADIOL 3,17-DIPROPIONATE 113-38-2 C24H32O4
Benperidol Benperidol 2062-84-2 C22H24FN3O2
ISOBARBITURIC ACID ISOBARBITURIC ACID 496-76-4 C4H4N2O3
1,7-DIMETHYLXANTHINE 1,7-DIMETHYLXANTHINE 611-59-6 C7H8N4O2
3-MERCAPTOISOBUTYRIC ACID 3-MERCAPTOISOBUTYRIC ACID 26473-47-2 C4H8O2S
BENZO[E]PYRENE BENZO[E]PYRENE 192-97-2 C20H12
Irgarol Irgarol 28159-98-0 C11H19N5S
Sodium m-arsenite Sodium m-arsenite 7784-46-5 AsO2.Na
1-Pentyl-3-(1-naphthoyl)indole 1-Pentyl-3-(1-naphthoyl)indole 209414-07-3 C24H23NO
Tapentadol Hydrochloride Tapentadol Hydrochloride 175591-09-0 C14H24ClNO
MONOBUTYL PHTHALATE MONOBUTYL PHTHALATE 131-70-4 C12H14O4
PENTACOSANOIC ACID PENTACOSANOIC ACID 506-38-7 C25H50O2
Difenacoum Difenacoum 56073-07-5 C31H24O3
N-NITROSODI-N-PROPYLAMINE N-NITROSODI-N-PROPYLAMINE 621-64-7 C6H14N2O
MIREX MIREX 2385-85-5 C10Cl12
4-Deoxypyridoxine hydrochloride 4-Deoxypyridoxine hydrochloride 148-51-6 C8H12ClNO2
1-Methyl-5-nitro-1H-imidazole-2-methanol 1-Methyl-5-nitro-1H-imidazole-2-methanol 936-05-0 C5H7N3O3
Chlorflurenol-methyl Chlorflurenol-methyl 2536-31-4 C15H11ClO3
N-[4-[2-(2-Amino-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]-L-glutamic acid  disodium salt hydrate N-[4-[2-(2-Amino-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]-L-glutamic acid disodium salt hydrate 357166-29-1 C20H24N5NaO7
PTEROIC ACID PTEROIC ACID 119-24-4 C14H12N6O3
CHLORDIAZEPOXIDE HYDROCHLORIDE CHLORDIAZEPOXIDE HYDROCHLORIDE 438-41-5 C16H15Cl2N3O
AMMELINE AMMELINE 645-92-1 C3H5N5O
2-CHLORO-4-NITROBENZAMIDE 2-CHLORO-4-NITROBENZAMIDE 3011-89-0 C7H5ClN2O3
Nandrolone 17-propionate Nandrolone 17-propionate 7207-92-3 C21H30O3
N-NITROSODIETHANOLAMINE N-NITROSODIETHANOLAMINE 1116-54-7 C4H10N2O3
2,2,2-TRIFLUORO-N-PHENYLACETAMIDE 2,2,2-TRIFLUORO-N-PHENYLACETAMIDE 404-24-0 C8H6F3NO
N-NITROSOPYRROLIDINE N-NITROSOPYRROLIDINE 930-55-2 C4H8N2O
PONCEAU SX PONCEAU SX 4548-53-2 C18H17N2NaO7S2
ANTAZOLINE PHOSPHATE ANTAZOLINE PHOSPHATE 154-68-7 C17H22N3O4P
Cymiazole Cymiazole 61676-87-7 C12H14N2S
Dinotefuran Dinotefuran 165252-70-0 C7H14N4O3
Benoxacor Benoxacor 98730-04-2 C11H11Cl2NO2
Terconazole Terconazole 67915-31-5 C26H31Cl2N5O3
N-PENTYL PROPIONATE N-PENTYL PROPIONATE 624-54-4 C8H16O2
Metobromuron Metobromuron 3060-89-7 C9H11BrN2O2
2-BUTYL-2-ETHYL-1,3-PROPANEDIOL 2-BUTYL-2-ETHYL-1,3-PROPANEDIOL 115-84-4 C9H20O2
2,3-Dichloropropionic acid 2,3-Dichloropropionic acid 565-64-0 C3H4Cl2O2
N-BUTYL METHANESULPHONATE N-BUTYL METHANESULPHONATE 1912-32-9 C5H12O3S
3-BROMO-2-METHYLPROPIONIC ACID 3-BROMO-2-METHYLPROPIONIC ACID 56970-78-6 C4H7BrO2
2-(4-BIPHENYLYL)-5-PHENYL-1,3,4-OXADIAZOLE 2-(4-BIPHENYLYL)-5-PHENYL-1,3,4-OXADIAZOLE 852-38-0 C20H14N2O
ENDRIN ENDRIN 72-20-8 C12H8Cl6O
VIOLURIC ACID MONOHYDRATE VIOLURIC ACID MONOHYDRATE 26351-19-9 C4H5N3O5
FLUMIOXAZIN FLUMIOXAZIN 103361-09-7 C19H15FN2O4
Dibromofluoromethane Dibromofluoromethane 1868-53-7 CHBr2F
TRILINOLEIN TRILINOLEIN 537-40-6 C57H98O6
2,4,5-TRIMETHYLANILINE 2,4,5-TRIMETHYLANILINE 137-17-7 C9H13N
1A,10B-DIHYDRO-6H-DIBENZO[B,F]OXIRENO[D]AZEPINE-6-CARBOXAMIDE 1A,10B-DIHYDRO-6H-DIBENZO[B,F]OXIRENO[D]AZEPINE-6-CARBOXAMIDE 36507-30-9 C15H12N2O2
SESAMOLIN SESAMOLIN 526-07-8 C20H18O7
3,3'-DIMETHYLNAPHTHIDINE 3,3'-DIMETHYLNAPHTHIDINE 13138-48-2 C22H20N2
Chloropyramine hydrochloride Chloropyramine hydrochloride 6170-42-9 C16H21Cl2N3
AFLATOXIN G1 AFLATOXIN G1 1165-39-5 C17H12O7
N,N'-DIETHYL-N,N'-DIPHENYLUREA N,N'-DIETHYL-N,N'-DIPHENYLUREA 85-98-3 C17H20N2O
Flumethasone 21-pivalate Flumethasone 21-pivalate 2002-29-1 C27H36F2O6
Amodiaquin dihydrochloride dihydrate Amodiaquin dihydrochloride dihydrate 6398-98-7 C20H25Cl2N3O2
2-chloro-1,3-butadiene 2-chloro-1,3-butadiene 126-99-8 C4H5Cl
ISOXSUPRINE HYDROCHLORIDE ISOXSUPRINE HYDROCHLORIDE 579-56-6 C18H24ClNO3
Thifensulfuron Thifensulfuron 79277-67-1 C11H11N5O6S2
Oxasulfuron Oxasulfuron 144651-06-9 C17H18N4O6S
2,3,5,6-TETRACHLOROPHENOL 2,3,5,6-TETRACHLOROPHENOL 935-95-5 C6H2Cl4O
QUININE SULFATE QUININE SULFATE 549-56-4 C40H50N4O8S
Nandrolone laurate Nandrolone laurate 26490-31-3 C30H48O3
Parbendazole Parbendazole 14255-87-9 C13H17N3O2
Prednicarbate Prednicarbate 73771-04-7 C27H36O8
3-Carboxy-2,2,5,5-tetraMethylpyrrolidine 1-Oxyl Free Radical 3-Carboxy-2,2,5,5-tetraMethylpyrrolidine 1-Oxyl Free Radical 2154-68-9 C9H16NO3*
Methyl 4-acetamido-2-methoxybenzoate Methyl 4-acetamido-2-methoxybenzoate 4093-29-2 C11H13NO4
D-Ephedrine hydrochloride D-Ephedrine hydrochloride 24221-86-1 C10H16ClNO
PHTHALIC ACID MONO-2-ETHYLHEXYL ESTER PHTHALIC ACID MONO-2-ETHYLHEXYL ESTER 4376-20-9 C16H22O4
5-METHOXYTRYPTOPHOL 5-METHOXYTRYPTOPHOL 712-09-4 C11H13NO2
Diflorasone diacetate Diflorasone diacetate 33564-31-7 C26H32F2O7
2,6-Dichlorothiobenzamide 2,6-Dichlorothiobenzamide 1918-13-4 C7H5Cl2NS
Hexamidine diisethionate Hexamidine diisethionate 659-40-5 C22H32N4O6S
DIELDRIN DIELDRIN 60-57-1 C12H8Cl6O
Dihydroergotoxine mesylate Dihydroergotoxine mesylate 8067-24-1 C20H29N3O5S
COUMACHLOR COUMACHLOR 81-82-3 C19H15ClO4
DL-TROPIC ACID DL-TROPIC ACID 552-63-6 C9H10O3
Ethychlozate Ethychlozate 27512-72-7 C11H11ClN2O2
2,4,6-Tris(trifluoromethyl)-1,3,5-triazine 2,4,6-Tris(trifluoromethyl)-1,3,5-triazine 368-66-1 C6F9N3
CYCLOPENTOLATE HYDROCHLORIDE CYCLOPENTOLATE HYDROCHLORIDE 5870-29-1 C17H26ClNO3
4-Isopropylthioxanthone 4-Isopropylthioxanthone 83846-86-0 C16H14OS
ACLONIFEN ACLONIFEN 74070-46-5 C12H9ClN2O3
ISOXADIFEN-ETHYL ISOXADIFEN-ETHYL 163520-33-0 C18H17NO3
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