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|Title: ||Dry reagent delivery system for field monitors and chemical sensors|
|Authors: ||Lee, John M.|
|Issue Date: ||1996|
|Publisher: ||© John Matthew Lee|
|Abstract: ||There are many methods available for a laboratory analyst to measure the amount of a
target analyte within an environmental sample containing a wide variety of other species.
However the vast majority of these methods require expensive instrumentation and the
analyst to be trained in its operation and safety procedures.
The aim of the following work was to produce a method of analysing environmental
pollutants within a complex matrix, without, or with minimal sample pretreatment, using
standard colorimetric methods. Results of the analysis would be displayed clearly within a
short time and with a high degree of accuracy, selectivity and sensitivity. The tests could
be used by an untrained operator and would not contain significant amounts of toxic or
irritating chemicals. All the reagents required for the determination and removal of
interferences would be contained within the test in the order required by the procedure.
The tests would be capable of mass production and would have a shelf life of at least 9
The following work describes the research carried out to meet the above criteria. The
species of environmental interest investigated are aluminium, silver, molybdenum, sulphur
dioxide and nitrogen dioxide. These species were chosen for reasons which will be
mentioned in greater depth in the introduction.
The tests are, however, not developed with a view to replacing existing instrumental
methods, but as means for an operator to determine whether their sample requires further
analysis using instrumentaion.
The aim of the test result is to provide the operator with the answer to questions such as
does my tap water contain more than the recommended limit of aluminium? or does the
effluent from my photographic laboratory contain an amount of silver which could lead to
my prosecution? The operator when given a measurement from the tests, by comparing
with a colour chart, for example, O.lflg mi-I, may then decide if they need further analysis
using for example, Iep MS techniques.
The development of both paper dip tests and a novel soluble polymer reagent delivery
system are described, as well as capillary fill and dry reagent tube devices. The successful soluble polymer matrix test (SPMT) is also applied to develop a stripping
voltammetric sensor for the detennination of lead in whole blood. It is hoped that the
SPMT will negate the need for pretreatment of the blood sample before determination|
|Description: ||A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough University.|
|Appears in Collections:||PhD Theses (Chemistry)|
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