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- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/Analytical_Chemistry_Labs/ASDL_Labware/Analog_and_Digital_Conversion_for_Chemical_Instrumentation/04_Number_RepresentationBefore discussing data conversions, it helps to understand the number systems used, why they're chosen, and how fast conversions must be made to be meaningful.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/Analytical_Chemistry_Labs/ASDL_Labware/Analog_and_Digital_Conversion_for_Chemical_Instrumentation/05_Digital_to_Analog_Conversion/01_Ladder_NetworksIf we feed back some of the output to one of the inputs and anchor one input at a fixed potential, the only stable behavior is to have the potentials of the two inputs very close to each other. Thus, ...If we feed back some of the output to one of the inputs and anchor one input at a fixed potential, the only stable behavior is to have the potentials of the two inputs very close to each other. Thus, if we connect the output to the inverting (-) input, V out = A(V + - V out ) which, with a little algebra, gives V out = A/(A+1) V + . Because A is big, A/(A+1) is close to 1, so the output potential equals the input.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/Analytical_Chemistry_Labs/ASDL_Labware/Micro_Separations_Distance%3A_Capillary_Electrophoresis/SOP_%2F%2F_Protocols/Operation_of_a_Capillary_Electrophoresis_SystemOperating the Custom-built CE System The instructions outlined in this section pertain to the parts, equipment, and software (Igor Pro) described in the Fabricating a Homebuilt CE system. If you use d...Operating the Custom-built CE System The instructions outlined in this section pertain to the parts, equipment, and software (Igor Pro) described in the Fabricating a Homebuilt CE system. If you use different components or parts, which you are not discouraged from doing, then ignore instructions specific to equipment or parts specified in this document.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/Analytical_Chemistry_Labs/ASDL_Labware/A_Microchip_Capillary_Electrophoresis_Experiment_for_the_Instrumental_Analysis_Laboratory/01_Description_of_the_Experiment/04_ConclusionsHowever, device fabrication consumes laboratory time that could be spent on studying and evaluating microfluidic and separation phenomena, such that we chose to provide students with fabricated CE mic...However, device fabrication consumes laboratory time that could be spent on studying and evaluating microfluidic and separation phenomena, such that we chose to provide students with fabricated CE microchips. We feel that this new experiment provides an excellent opportunity to introduce students to the fundamentals of microfluidics, and also reinforces key concepts in separations, microscopy and fluorescence detection.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/Analytical_Chemistry_Labs/ASDL_Labware/Cell_Phone_Spectrophotometer/05_Student_Module/Part_ASince the middle of the 19 th century, with the development of photographic plates, and then in the 20 th century with the development of photomultipliers and photodiodes, it was ludicrous to think th...Since the middle of the 19 th century, with the development of photographic plates, and then in the 20 th century with the development of photomultipliers and photodiodes, it was ludicrous to think that reasonable measurements could be made with nearly-free equipment. Rather, the results of the tests, processed with software on the cell phone, will report a diagnosis, send the diagnosis to an appropriate node on the net, and then alert the phone's owner of the doctor's medical advice.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/Analytical_Chemistry_Labs/ASDL_Labware/Analytical_Electrochemistry%3A_A_Laboratory_Manual/02_Experiments/3._Chronoamperometry_With_a_Planar_Solid_Electrode/01_BackgroundThis i-t response is comprised of two components: the current due to charging the double- layer and the other due to the electron transfer reaction with the electroactive species. The results are most...This i-t response is comprised of two components: the current due to charging the double- layer and the other due to the electron transfer reaction with the electroactive species. The results are most easily interpreted when a planar (flat) electrode is used in a quiet, unstirred solution, and the applied potential is sufficient to reduce or oxidize the electroactive species as fast as it gets to the electrode surface, i.e., at a diffusion-controlled rate.
- https://chem.libretexts.org/Ancillary_Materials/Worksheets/Worksheets%3A_Analytical_Chemistry_II/Mass_Spectrometry%3A_Performance_Enhancing_DrugsBoth compounds are in the gas phase and ionized; each compound lost an electron resulting in two radical cations T+• and N+•. The gas phase ions are propelled towards the detector by applying a positi...Both compounds are in the gas phase and ionized; each compound lost an electron resulting in two radical cations T+• and N+•. The gas phase ions are propelled towards the detector by applying a positive charge to the electrode next to the injection port, causing the ions to be repelled (fly) towards the detector.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Supplemental_Modules_(Analytical_Chemistry)/Analytical_Sciences_Digital_Library/In_Class_Activities/Biological_Mass_Spectrometry%3A_Proteomics/Section_3%3A_Peptide_Mass_Mapping/Section_3C._Peptide_Mass_Mapping_for_Protein_IdentificationOnce all the proteins are predicted then the cleavage rules for the digest enzyme are applied and the masses of the resulting peptides calculated by the computer (in-silico digest). K and R make up ab...Once all the proteins are predicted then the cleavage rules for the digest enzyme are applied and the masses of the resulting peptides calculated by the computer (in-silico digest). K and R make up about 10% of the amino acids in a protein and digesting with trypsin typically results in peptides in a useful range mass range for mass spectrometry (500-3,000 Da). (Remember: The mass unit amu is the same as Da.)
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/Analytical_Chemistry_Labs/ASDL_Labware/Forensic_Science_Laboratory/Drugs_(Blood)/Instructor's_NotesCompare the mass spectrum generated by the drug in the simulated plasma sample to known spectra of the possible drugs (prepare a list of possibilities for the students). Once the drug is identified, t...Compare the mass spectrum generated by the drug in the simulated plasma sample to known spectra of the possible drugs (prepare a list of possibilities for the students). Once the drug is identified, the peak areas of the standard and sample can be compared and calculations made to estimate the concentration of the drug in the sample.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/Analytical_Chemistry_Labs/ASDL_Labware/Electrochemistry_and_Detection_of_Organic_and_Biological_MoleculesThis paper describes an undergraduate laboratory for an electroanalytical chemistry course that can be used to supplement the teaching of oxidation and reduction reactions. The laboratory also introdu...This paper describes an undergraduate laboratory for an electroanalytical chemistry course that can be used to supplement the teaching of oxidation and reduction reactions. The laboratory also introduces basic electrochemical techniques, instrumentation, and preparation of a conducting polymer film, poly (2,2-bithiophene), as a chemical sensor for the detection of an organic molecule catechu in the presence of a common in terferent, ascorbic acid.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/Analytical_Chemistry_Labs/ASDL_Labware/Analytical_Electrochemistry%3A_A_Laboratory_Manual/02_Experiments/5._Analysis_of_Trace_Lead_in_Water_by_Anodic_Stripping_Voltammetry/06_Referenceswww.luc.edu/chemistry/faculty..._learning.html A website maintained by Professor Alanah Fitch of Loyola University (Chicago, IL) on environmental Pb analysis, etc. http://www.tau.ac.il/~advanal/Labora...www.luc.edu/chemistry/faculty..._learning.html A website maintained by Professor Alanah Fitch of Loyola University (Chicago, IL) on environmental Pb analysis, etc. http://www.tau.ac.il/~advanal/LaboratoryManual.htm This is a laboratory manual with experiments in electroanalytical chemistry applications to the analysis of drinking water, as maintained by Tel Aviv University. Experiment #6 is a description of heavy metal analysis by stripping voltammetry.
