谷胱甘肽欧洲药典5.1标准.docx
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GLUTATHIONE
Glutathionum
C10H17N3O6SMr307.3
DEFINITION
L-?
-Glutamyl-L-cysteinylglycine.
Content:
98.0percentto101.0percent(driedsubstance).
谷胱甘肽
C10H17N3O6SMr307.3
定义描述
L-r谷氨酰基-L-半胱氨酰基甘氨酸
含量:
按干燥品计算,98.0%-101.0%
CHARACTERS
Appearance:
whiteoralmostwhite,crystallinepowderor
colourlesscrystals.
Solubility:
freelysolubleinwater,veryslightlysolublein
ethanol(96percent)andinmethylenechloride.
性状
外观性状:
白色或几乎白色结晶性粉末或无色的结晶。
溶解度:
易溶于水,微溶于96%乙醇及二氯甲烷。
IDENTIFICATION
A.Itcomplieswiththetestforspecificopticalrotation(see
Tests).
B.Infraredabsorptionspectrophotometry(2.2.24).
Comparison:
glutathioneCRS.
鉴别
A比旋度符合特定的光学旋转测定(见测定项)。
B红外吸收光谱检测(2.2.24)
对比:
谷胱甘肽CRS.
TESTS
SolutionS.Dissolve5.0gindistilledwaterRanddiluteto50mlwiththesamesolvent.
Appearanceofsolution.SolutionSisclear(2.2.1)andcolourless(2.2.2,MethodII).
Specificopticalrotation(2.2.7):
?
15.5to?
17.5(driedsubstance).
Dissolve1.0ginwaterRanddiluteto25.0mlwiththesamesolvent.
测定
溶液S:
取本品5.0g,蒸馏水R溶解并稀释至50ml。
溶液澄清度溶液S澄清(2.2.1),无色(2.2.2,MethodII)
比旋度(2.2.7)-15.5。
~-17.5°(干品物质)
取本品1.0g,蒸馏水R溶解并稀释至25.0ml。
Relatedsubstances.Capillaryelectrophoresis(2.2.47).
Preparethesolutionsimmediatelybeforeuse.
Internalstandardsolution(a).Dissolve0.100gofphenylalanineRintheelectrolytesolutionanddiluteto50.0mlwiththesamesolution.
Internalstandardsolution(b).Dilute10.0mlofinternalstandardsolution(a)to100.0mlwiththeelectrolytesolution.
Testsolution(a).Dissolve0.200gofthesubstancetobeexaminedintheelectrolytesolutionanddiluteto10.0mlwiththesamesolution.
Testsolution(b).Dissolve0.200gofthesubstancetobeexaminedininternalstandardsolution(b)anddiluteto10.0mlwiththesamesolution.
Referencesolution(a).Dissolve20mgofthesubstancetobeexaminedininternalstandardsolution(a)anddiluteto10.0mlwiththesamesolution.
Referencesolution(b).Dilute5.0mlofreferencesolution(a)to50.0mlwiththeelectrolytesolution.
Referencesolution(c).Dissolve0.200gofthesubstancetobeexaminedin5mloftheelectrolytesolution.Add1.0mlofinternalstandardsolution(a),0.5mlofa2mg/mlsolutionofL-cysteineR(impurityB)intheelectrolytesolution,0.5mlofa2mg/mlsolutionofL-glutathione,oxidisedR(impurityC)intheelectrolytesolutionand0.5mlofa2mg/mlsolutionofL-?
-glutamyl-L-cysteineR(impurityD)intheelectrolytesolution.Diluteto10.0mlwiththeelectrolytesolution.
有关物质采用毛细管电泳法(2.2.47)
溶液应临用前新鲜配制
内标液(a)取苯丙氨酸0.100g,加电解质溶液溶解并稀释至50.0ml
内标溶液(b)量取内标溶液(a)10.0ml,用电解质溶液稀释至100.0ml
供试溶液(a)取待检物质0.200g,加电解质溶液溶解并稀释至10.0ml。
供试溶液(b)取待检物质0.200g,加溶液(b)溶解并稀释至10.0ml
对照溶液(a)取待检物质20g,加标准溶液(a)溶解并稀释至10.0ml
对照溶液(b)取对照溶液(a)5.0ml,加电解质溶液稀释至50.0ml
对照溶液(c)取待检物质0.200g,加电解质溶液5ml溶解,加入1.0ml对照溶液(a),0.5ml2mg/mlL-半胱氨酸R的电解质溶液(杂质B),0.5ml2mg/ml氧化型谷胱甘肽R电解质溶液(杂质C)及0.5ml2mg/mlL-r谷氨酰基-L-半胱氨酰基甘氨酸R的电解质溶液(杂质D),然后用电解质溶液稀释至10.0ml
Capillary:
-material:
uncoatedfusedsilica,
-size:
lengthtothedetectorcell=0.5m;total
length=0.6m;?
=75μm.
Temperature:
25°C.
Electrolytesolution.Dissolve1.50gofanhydroussodiumdihydrogenphosphateRin230.0mlofwaterRandadjusttopH1.80withphosphoricacidR.Diluteto250.0mlwithwaterR.CheckthepHand,ifnecessary,adjustwithphosphoricacidRordilutesodiumhydroxidesolutionR.
Detection:
spectrophotometerat200nm.
Preconditioningofanewcapillary:
rinsethenewcapillarybeforethefirstinjectionwith0.1Mhydrochloricacidfor20minat138kPaandwithwaterRat138kPafor10min;forcompleteequilibration,conditionthecapillarywiththeelectrolytesolutionfor40minat350kPa,andsubsequentlyfor60minatavoltageof20kV;
毛细管
-材料:
石英(未涂层)
-尺寸:
有效长度0.5m,总长:
0.6m,内径75μm
温度:
25℃
电解质溶液:
取无水磷酸二氢钠R1.50g,加水R230.0ml,用磷酸R调节PH值为1.80。
加水R稀释至150.0ml,检测PH值,如有必要,用磷酸R或氢氧化钠溶液R调节PH值。
检测:
采用分光光度计在200nm处检测
新毛细管的预处理:
在首次进样前在压力138Kpa下用0.1mol/L盐酸溶液前冲洗毛细管20min,138Kpa压力下用水R冲洗10分钟已达到全平衡状态,用电解质溶液在350kpa条件下冲洗40min,在电压20kv条件下保持60min。
Preconditioningofthecapillary:
rinsethecapillaryat138kPawiththeelectrolytesolutionfor40min;
Between-runrinsing:
rinsethecapillarywithwaterRat138kPafor1min,with0.1Msodiumhydroxidefor2min,withwaterRat138kPafor1min,with0.1Mhydrochloricacidfor3minandwiththeelectrolytesolutionat138kPafor10min.
Injection:
underpressure(3.45kPa)for5s;injecttheelectrolytesolution(blanksolution),referencesolutions(b)and(c)andtestsolutions(a)and(b).
Migration:
applyavoltageof20kV.
Runtime:
45min.
预处理的毛细管:
138kPa压力下,用电解质溶液冲洗毛细管40min;
批间冲洗:
138kPa压力下,依次用水R冲洗毛细管1min,0.1mol/L氢氧化钠溶液冲洗2min;水R冲洗1min,0.1mol/L盐酸溶液冲洗3min,最后用电解质溶液冲洗10min;
进样:
3.45kPa压力下维持5s;注入电解质溶液(空白溶液),对照溶液(b)、(c)和供试溶液a、b
迁移:
电压为20KV
运行时间:
45min
Relativemigra