ladingsbepaling+ colorimetrische testen Flashcards

1
Q

FMOC bepaling

A

golflengte =301nm
e= 7800 (M*cm)^-1
20%piperdine/DMF
intens geel

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2
Q

ninhydrine test

A

golflengte= 570nm
e= 15000 (M*cm)^-1
niet: cysteine en proline
paars

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3
Q

picrinezuur test

A

stap 1: vorming van het ammonium picraat zout
stap 2: uitwisseling van het zout met DIPEA
stap 3: bepaling van het diisopropylethylammonium picraat zout
golflengte= 358nm
e=14500 (M*cm)^-1
geel
zeer explosief, niet bij zuurgevoelige linkers

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4
Q

DMT (dimethoxytrityl) test

A

afsplitsing: 2% DCA of DCM
golflengte: 498nm
e= 76000 (M*cm)^-1
oranje-rode kleur
tijdelijke beschermingsgroep bij oligonucleotide synthese => bepalen hvh nucleoside dat gekoppeld is

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5
Q

bromophenoltest

A

colorimetrische test

geel (429nm)=> blauw 600nm, e= 91800 (M*cm)^-1

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6
Q

kaiser ninhydrine test

A

colorimetrische test
reactie met prim amine => blauw kleuring
niet met proline

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7
Q

TNBS test

A

colorimetrische test
trinitrobenzeensulfonzuur => nucleofiele arom substitutie=> H20 +S02
geel => oranje rood

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8
Q

NF31

A

colorimetrische test
reactief ester+ prim amine=> amide
na wassen: rode kleur door covalente binding

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9
Q

ellman’s test

A

5,5’-(dithiobis)-(2-nitrobenzoëzuur)+ vrije thiol => disulfide uitwisseling
geel

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