食品中糖的测定.doc

1. 1.,?2 .,?3.,2. ,(1., 2, 3., 4.)3. ,(1. 2. 3. 4. 5. 6.).?1122-CHO(=C=O)? ? 1. C6H12O6+6K3Fe(CN)6 + 6KOH (CHOH)4?(COOH)2 + 6K4Fe(CN)6+ 4H2O2112)31030NaOH411.0000g500ml50ml100mlhcl5ml65-701530NaOH10ml110NaOH2.5ml12.5ml10.5ml1A=(W?V)/(10000.95)A10mlVW10000.95310g100ml250ml2010ml10ml10NA2HPO450ml100ml%= (A 1000)/(W?V) 100? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?A10mlWV4abc1. 2. 1? ? 500g500ml2? ? 10.6g100ml3? ? 0.20.2g100ml954? ? 0.10.1000g 100ml3. 1? ? 2? ? 100ml?61cm610nm310g100ml500ml5ml55ml500ml25ml250ml250ml1ml10ml612341-2.5mg/100ml.?1. 0.2-0.5%10AB?0.0500? ? ? ? ? ? ? ? ?0.0678? ? ? ? ? ? ? ? ?0.0807?21? ? A69.8g cp100ml2? ? B34.6g.cp100gcp NaOH1000ml310-20gA,BAB5ml15ml31Lanecrol-Eynon Method A,B5ml0.5-1.0ml21333( F?V2)/(W?V1)100F10mlV1V2W319-8100ml262.5mg10ml9-520ml20mlA,B 100ml199.3ml10ml A,B 9-4 25.00ml1 A,B 0.5A,B A.R1.5g250ml50ml100ml HCL5ml65-701530NaOHA,B 5ml50ml1110.5ml111 AW*V/5000.95A10mlABWV 5000.951011ml12. %=A*1000/W*V*100AWV1000100/50*5001. 0.1%800W2KMNO41KMNO42. 1a. 2-5g2550ml250ml50mlA10ml+1N NaOH 4ml 30b. CO2100ml1 N NaOH 250ml50mlA10ml1 N NaOH 4ml30c. 10-20g250ml200ml451200ml250mlA10ml+1N NaOH 4ml30d. CO2100ml250ml250ml400mlAB25ml4min2min60Cu2O25ml25mlCu2O0.1N KMnO450ml33. 12 Cu2OCu2O31. ? ?2. 3. 1? ? 250ml5ml5ML302? ? AB5ml10ml2AB5mL0.5-1.0ML21250mL100ML68-701522%=F(100/V2-100/V1) /(Ww50/250w1000)w 100w0.95F10mlmgV1mlV2mlw(G)10000.952()342,2180.342/360=0.95.0.95.,.,.,.Rf=