High Technology, Inc.
109 Production Road,
Walpole MA 02081 USA
Document Number
OM-E-FC-360-30
Revision Level
Rev. 3
Prepared by
J.S. Bolio
Approved by
S. Titov
Effective Date
8/15/2016
Operator’s Manual: HTI BioChem FC-360
HIGH TECHNOLOGY, INC. PROPRIETARY AND CONFIDENTIAL
Page 87 of 222
8.1.4.3 Kinetics
In this type of reaction, a set of readings through a specified period is taken by the instrument, as
programmed by the user.
This method monitors the initial substrate consumption, and calculates by least squares the slope of the
straight line that the Δabs/min determines.
This type of reaction is used for tests like AST, ALT, etc., where the speed of production or consumption
of NADH, etc. is measured.
Figure 8-11
8.1.4.3.1 Entering Times and Values
T. BDT
(Bubble Dispersion Time)
:
Time from the start of the reaction until the first absorbance
reading.
This absorbance will be used for the initial substrate consumption calculation, but not for the
calculation of the end result. This absorbance is compared with the
Time to start Readings
absorbance. A
T. BDT
of 20 seconds is suggested.
Time to start Readings:
Time from the
T.BDT
, at which the absorbance reading should be started,
according to the instructions given by the reagent manufacturer.
Time to end Readings:
Time from the
T.BDT
, at which the absorbance readings should be ended.
N° of Measurements:
Number of readings to be taken in the time between the
Time to Start
Readings
and the
Time to end Readings.
3 readings are recommended. 10 readings maximum.
Initial Consumption:
Maximum value permi
tted in Δabs/min for the method indicated by the reagent
manufacturer. If the
substrate initial consumption (Δabs/min) of the reaction is greater than the value
entered here, the instrument will dilute the sample automatically. The absorbances used for this
calculation are those measured between the
“T.BDT”
and the
“Time to start Readings”
and its value
is extrapolated to Δabs/min. It is recommended to enter the reagent manufacturer’s suggested value.