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Math in the Workplace: Overview

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Math in the Work Place

Math in the Workplace - Algebra

MICRON TECHNOLOGY, INC.,

Semiconductor Manufacturing

 

Job Description: Analyzes chemicals, tools, and wafers for the fabrication process. Analyzes waste products resulting from the memory chip fabrication process.

   


Problem:

The government requires that companies analyze and report the amount of ethyl lactate present in waste sent to a waste disposal company.

The ethyl lactate sample area is 6,821,193 counts. An ethyl lactate standard has a "concentration" of 10.16 wt% and a peak area of 10,617,862 counts.

What is the concentration (amount) of ethyl lactate in a solvent sample from gas chromatography data?

solution 

 

 

 

 

 

 

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Solution:

Since the relationship is linear, use a ratio:
Concentrate of standard (X1) is to counts of standard (c1) as concentrate of sample (X2) is to counts of sample (c2)

standard sample
X1
line
c1		 = X2
line
c2
 

10.16 wt %
line
10,617,862 cts

  =

X2 wt %
line
6,821,193 cts

X2 wt % = 10.16 wt % bracket 10,617,862
line
6,821,193		 bracket

= 1.556  x 10.16 wt % = 15.81 wt %

Concentration of sample= 15.81 wt %