00:01
Let's just answer this question.
00:02
So here we have the phosphorus concentration measured by the spectrometry.
00:06
So here the complete process is given to us.
00:08
So here we need to draw the calibration curve using the absorbance measurement and also label all the axis and also answer whether we think this calibration curve is acceptable or not.
00:20
Then we have a spectrophotometric analysis of orthophosphate in water sampled at the junction of sand -joiquin river and bear creek gave an absorbent of 0 .7579.
00:32
So is this water out of compliance with epa standards? we need to find that.
00:37
So let's start.
00:39
Absorbance a is equal to minus log of t.
00:46
Here a is the absorbance and t is the transmittance.
00:50
So here we can say in first case, t is equal to 91 % means a will be equal to minus log of 0 .91 so therefore we can say a is equal to 0 .04.
01:13
So therefore we can say absorbance for t is equal to 42%.
01:24
It will be a that is equal to minus log 0 .42.
01:31
So here the value of a is equal to 0 .37...