negative peak for water in ethanol-water sample analysis
Posted: Sun Aug 19, 2007 10:17 am
hai , am getting negative peak for water when analysing a water-ethanol sample on Shimadzu-GC-17A ATFW ver.3:why am getting such result?
detector:TCD.
carrier gas and makeup gas are both N2
analysis time 5 min, oven temp;130oC
inj temp:150oC
det temp: 200oC
current:35mA
column details are
column:capilary column is CBP1-S25-050,
ZB-5, 5%-phenyl-
95% -dimethyl polysiloxane
non polar
max. temperature is 320 0C
length =30 m
inner diameter= 0.32 mm ID
film thickness = 0.25 micro meter
and also i need information on analysis of [1,4-dioxane and water sample]
can i use it for analysing 1,4-dioxane and water solution,
plz tell me what can i do.[conditions etc.,will be mantain for getting good
results]
detector:TCD.
carrier gas and makeup gas are both N2
analysis time 5 min, oven temp;130oC
inj temp:150oC
det temp: 200oC
current:35mA
column details are
column:capilary column is CBP1-S25-050,
ZB-5, 5%-phenyl-
95% -dimethyl polysiloxane
non polar
max. temperature is 320 0C
length =30 m
inner diameter= 0.32 mm ID
film thickness = 0.25 micro meter
and also i need information on analysis of [1,4-dioxane and water sample]
can i use it for analysing 1,4-dioxane and water solution,
plz tell me what can i do.[conditions etc.,will be mantain for getting good
results]