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It's when you have to fill it in. Or when their is an answer key at the botttom!! That's all i got.. Lol(: (**)
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What is the difference between reagent blank and sample blank?
Reagent Blank : Take reagent and add deionised water (in place of sample to be tested). Now measure the OD at specific wavelength --> this OD is your reagent blank. Substract this OD from your test result (with sample) to avoid any false +ve effect due to colour of reagents itself.Sample Blank : Take sample and measure the OD without adding reagents --> this OD is your sample blank. Substract this OD from your test result to avoid any false +ve effect due to colour and turbidity of sample itself. As it is the fact that colour and turbidity of each sample would vary from one to another.So now it is clear that Reagent blank is used to avoid bias due to colour of reagents and Sample blank is used to avoid bias due to sample itself.
How do you know if your sperm is blank?
You would need to get a sample tested at a laboratory.
If a particular sample has 36 participants and the other sample has 40 participants the total degrees of freedom for the study is fill in the blank?
v = n1 + n2 - k n1 = 36, n2= 40 and k=2 v = 36 + 40 - 2 v = 74
What is blank divided by blank which equals two divided by blank which equals 315?
One possible answer: Blank 1 = 3150 Blank 2 = 10 Blank 3 = (2/315) = approx 0.006349
4 times blank plus 7 times blank equals 99?
7 times blank = 2 times blank
What is the purpose of the blank?
Blank Sample in Spectrophotometry is used to measure the absorbance of light without sample. It is subtracted from the total absorbance for measurement of Absorbance from a sample's absorbance.
What is the purpose of blank samples?
Blank Sample in Spectrophotometry is used to measure the absorbance of light without sample. It is subtracted from the total absorbance for measurement of Absorbance from a sample's absorbance.
What is the difference between reagent blank and sample blank?
Reagent Blank : Take reagent and add deionised water (in place of sample to be tested). Now measure the OD at specific wavelength --> this OD is your reagent blank. Substract this OD from your test result (with sample) to avoid any false +ve effect due to colour of reagents itself.Sample Blank : Take sample and measure the OD without adding reagents --> this OD is your sample blank. Substract this OD from your test result to avoid any false +ve effect due to colour and turbidity of sample itself. As it is the fact that colour and turbidity of each sample would vary from one to another.So now it is clear that Reagent blank is used to avoid bias due to colour of reagents and Sample blank is used to avoid bias due to sample itself.
Can a blank titration reading be greater than sample titration?
yes.
How do you know if your sperm is blank?
You would need to get a sample tested at a laboratory.
Why do you use acetone as a blank?
the reference blank should contain everything found in the sample solution except the substance you are trying to analyze or measure.
How are systematic errors detected?
independent analysis blank determinations variation in sample size
The amount of each kind of soil particle in a sample determines the blank of the soil?
Dirt
In analytical chemistry what is mean by blank?
A blank is a sample in which you will find none of the analyte you're looking for in your samples. For example, simple deionized water is often used as a blank when analyzing a group of samples that are concentrated in water.
What should be the value of free fatty acid of a blank sample?
Fatty acids are ubiquitous in the environment and you will see 100s of ng of these acids in your lab blank regardless of how you clean it.
What does it mean if one found negative absorption in uv-vis absorption graph?
That means your blank has a higher absorption at that particular wavelength than the sample. This really shouldn't happen assuming your blank is water.
Equation used to determine the iodine value?
Iodine value= (B-S)N x 12.69 ------------------- wt of sample where, B=titration of blank S= titration of sample N= normality of thiosulphate
