Case Study 1: Recently, our research group inthe Department have developed a simple,quick and portable analytical method for thedetection of Pb2+ (a toxic heavy metal) inaqueous solutions. It is based on thefluorescent properties of the nanomaterialsknown as carbon quantum dots (CQD). Thesenanomaterials are highly soluble in water andin aqueous solutions, they emit blue-greenlight when irradiated with an ultraviolet light(from a UV lamp or laser diode). In thepresence of Pb²+, the intensity of the lightemitted by CQD decreases, and the decreaseof intensity of fluorescence is related to theconcentration of Pb²+. In this method, theintensity of emitted light is measured by takinga photograph of the fluorescent test sampleusing a smartphone camera (Iphone 8) andthen determining using an image analysissoftware the value of image pixel variablesthat are related to the intensity of theblue-green light emitted by the sample.10) Research on how a digital camera (such asin smartphone) works, particularly, how it canrecord an image in a pixel. Using the conceptsand principles that you've learned, conciselydiscuss how the smartphone camera is used intheinstrumental method described in CaseStudy 1. Specifically, describe how it can beused to obtain the desired chemicalinformation about the analyte.

Digital reduction is such an instrument which is needed in every field. There will hardly be any…

Answered: blue-green

Science

Chemistry

blue-green

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.

Question

Case Study 1: Recently, our research group in
the Department have developed a simple,
quick and portable analytical method for the
detection of Pb2+ (a toxic heavy metal) in
aqueous solutions. It is based on the
fluorescent properties of the nanomaterials
known as carbon quantum dots (CQD). These
nanomaterials are highly soluble in water and
in aqueous solutions, they emit blue-green
light when irradiated with an ultraviolet light
(from a UV lamp or laser diode). In the
presence of Pb²+, the intensity of the light
emitted by CQD decreases, and the decrease
of intensity of fluorescence is related to the
concentration of Pb²+. In this method, the
intensity of emitted light is measured by taking
a photograph of the fluorescent test sample
using a smartphone camera (Iphone 8) and
then determining using an image analysis
software the value of image pixel variables
that are related to the intensity of the
blue-green light emitted by the sample.
10) Research on how a digital camera (such as
in smartphone) works, particularly, how it can
record an image in a pixel. Using the concepts
and principles that you've learned, concisely
discuss how the smartphone camera is used in
theinstrumental method described in Case
Study 1. Specifically, describe how it can be
used to obtain the desired chemical
information about the analyte.

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