what effect run blank sample but not change machine can affect results...if you don't have machine set up right - can't get a reliable result
when perform test known to contain particular compound....
this is why you have a protocol
motion to strike - granted
significant run blank sample - show positive for chemical and chemical should not be there....blank sample says something present - know problem with test performance or machine....make sure test or techinique doesn't give false postive result...
closed valve - destroy or mess up a run what does that mean? i don't know ...that question is too - cant answer way was asked.....issues with valve being closed - bench notes reviewed from Oakridge - sometimes when test run valves not closed - sometimes result failed or gave wrong result---what about triple sorbent trap freezing (object-sustain)
lab to change technique in middle of experiment (objet- sustain rephrase)
when reviewed notes taken in this case - any techniques changed in mid of experiment? yes ...conditions of analysis changed over several weeks to analyse specimin to ....
object - sustain
what does that mean to you - object-sustain
when you run a standard to determine if machine is reading a standard - typically done on same day when run sample-yes why? ensure you are testing evidence and samples are known....it did not occur - do you know how many times? IT DID NOT Occur...explain...
I didn't count how many occassions it didn't occur - standards of proper functioning of instrument was days or weeks later.
Oleic acid is fatty acid - found in? object - outside expertise - ovrrule
run test where there fatty acids - prevelent in all kinds bio materials - show up every day in tox labs.....testing in some form of fatty acids approximate? thousands of times...familiar with and engaged in testing with palmetic, steric, myristic and oleic acids....what contain myristic acids? beyond expert - object - overrule
fatty acids occur in all kinds bio material - animal, plant, household .....food products in dairy, meat, cheese butter and milk,
if you were to test item contain all of the above - on a paper towel - toxicologist what conclusion reach regard those four items - object beyond expertise - overrule
conclude those fatty acids present in paper towel.....caused from cheese? yes
percentage of which fatty acid may occur higher - if have all 4 in a particular substance...ratio of fatty acids in meat pizzaa? object- sustain unless establish foundation
relative ratio of fatty acids in pizza andfood stuffs - reviewed literature - opinion ? object - sidebar