Yokogawa GC8000 Process Gas Chromatograph User Manual

Page 115

<1. Overview>

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IM 11B08A01-01E

The example of tracking standard and tracking interval are shown below.
(1) When there is zero (0) standard

Because tracking factor cannot be calculated, tracking is not performed.

(2) When there is one standard

Time

Tracking peak
Factor a1

Standard peak
Factor a1

• P1:

The

fi rst tracking peak follows the subsequent standard peak, therefore, tracking factor

is a1.

• P2: This is the 1st standard peak. a1= y1 / x1 (b1=0)
• P3 to P6: Because there is no other standard peak after the 1st peak, follow the 1st

standard peak, therefore, tracking factor is a1.

(3) When there is more than one tracking standard

Time

Tracking peak
Factor a1

Tracking peak
Factor a2
Factor b2

Standard peak
Factor a2
Factor b2

Tracking peak
Factor a2
Factor b2

• P1:

The

fi rst tracking peak follows the subsequent standard peak, therefore, tracking factor

is a1.

• P2: This is the fi rst standard peak. a1= y1 /x1 (b1=0)
• P3: Because the tracking peak that exists between the 1st and the 2nd standard peak

follows the 2nd standard peak, the tracking factors are a2 and b2.

• P4: The 2nd standard peak is calculated by two standard peaks of the 1st and the 2nd.
a2 = (y1-y2) / (x1-x2), b2 = y1 - {(y1 - y2) / (x1 - x2)}× x1
• P5 to 6: Because there is no standard peak after the 2nd peak, follow the 2nd standard

peak, therefore, tracking factors are a2 and b2.

2nd Edition : May 11, 2012-00