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- https://chem.libretexts.org/Courses/Providence_College/CHM_331_Advanced_Analytical_Chemistry_1/11%3A_Raman_Spectroscopy/11.02%3A_Introduction_to_Lasers/11.2.03%3A_Types_of_Lasers/11.2.3.03%3A_Diode_LasersExcitation is achieved by the passage of electric current (forward biased) through the diode p-n junction, which forms at the interface between semiconductors with different electronic doping levels. ...Excitation is achieved by the passage of electric current (forward biased) through the diode p-n junction, which forms at the interface between semiconductors with different electronic doping levels. The layered structure and high refractive index of semiconductor materials enables the laser optical cavity to be formed on the diode (see drawing, right). Diode lasers are finding application in a wide range of areas, such as communications, medicine and chemical analysis (see Ref 2, 14, a, b).
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/Analytical_Chemistry_Labs/Laboratory_Activities/Quality_Control_Analysis_for_a_Local_Brewery/03_Instructor%E2%80%99s_Manual/01_Rationale_for_Changing_from_a_Traditional_CurriculumDue to large number of students and time constraints, often the TA tests the experiment and makes any adjustments to ensure the instrument is working properly. Since the projects were introduced, stud...Due to large number of students and time constraints, often the TA tests the experiment and makes any adjustments to ensure the instrument is working properly. Since the projects were introduced, students routinely optimize instrument settings for their specific analysis, fix problems such as clogged AA burners, and perform general maintenance such as cleaning electrodes and changing a capillary in the CE.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/Analytical_Chemistry_Labs/Laboratory_Activities/Theme-Based_Lab_Experience/Instructor%E2%80%99s_Manual/02_A_Theme-Based_Modular_Approach3 The theme-based modular approach to the instrumental analysis laboratory was developed in response to these documents, making an attempt to put into practice those ideas that the chemical education ...3 The theme-based modular approach to the instrumental analysis laboratory was developed in response to these documents, making an attempt to put into practice those ideas that the chemical education research demonstrated were necessary to improve the learning environment for the students.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/Analytical_Chemistry_Labs/Laboratory_Activities/Acid_Mine_Drainage_Project_Lab/02_Project_Overview/03_Project_DescriptionIt is important to remember that the reactions you are looking at are occurring on the surface of the mineral samples; however, it is nearly impossible to detect what is actually on the surface. Your ...It is important to remember that the reactions you are looking at are occurring on the surface of the mineral samples; however, it is nearly impossible to detect what is actually on the surface. Your answer will depend on the iron concentration you expect to obtain from your dissolution reactions and on the iron concentrations you can measure with the spectrophotometer. The primary goals of the questions are to determine your knowledge of the project itself and your analysis of your data.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Supplemental_Modules_(Analytical_Chemistry)/Analytical_Sciences_Digital_Library/Courseware/Chemical_Equilibrium/04_Instructor's_Manual/04_Solubility_Equilibria/01_Accounting_for_pHb) The solution is buffered at a pH of 3 and you will need to consider the protonation of phosphate that can occur. Students should realize that every mole of phosphate must have come from the origina...b) The solution is buffered at a pH of 3 and you will need to consider the protonation of phosphate that can occur. Students should realize that every mole of phosphate must have come from the original lead(II)phosphate and that the S expression must be modified to include the total concentration of phosphate species present. They also realize that since we know the pH, and since we are considering total phosphate species, that an α-value is likely used somehow to solve the problem.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Supplemental_Modules_(Analytical_Chemistry)/Analytical_Sciences_Digital_Library/Contextual_Modules/End_Creek%3A_Spotted_Frogs_and_Aquatic_Snails_in_Wetlands__A_Water_Quality_Investigation/09_Instructors_Guides/07_Analysis_of_Cations_and_Anions_by_Ion-Selective_Electrodes_(ISEs)The high concentration of K + Cl - will affect the ionic strength of the solution, and, in turns, affect the activity coefficient of Na + . This effect can be calculated more formally using the extend...The high concentration of K + Cl - will affect the ionic strength of the solution, and, in turns, affect the activity coefficient of Na + . This effect can be calculated more formally using the extended Debye-Huckel equation (Equation 6.63 in the Harvey Analytical 2.0 text).
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Supplemental_Modules_(Analytical_Chemistry)/Analytical_Sciences_Digital_Library/Contextual_Modules/End_Creek%3A_Spotted_Frogs_and_Aquatic_Snails_in_Wetlands__A_Water_Quality_Investigation/09_Instructors_Guides/05_Analysis_of_Cations_by_Atomic_SpectroscopyHollow cathode lamps that emit both calcium and magnesium lines are available but the spectrophotometer will have to be tuned to the absorption wavelength of one metal, then calibrated and eventually ...Hollow cathode lamps that emit both calcium and magnesium lines are available but the spectrophotometer will have to be tuned to the absorption wavelength of one metal, then calibrated and eventually used to determine the concentration of the metal in the unknown sample. The calibration equation will be of the form A = mx + b where A is the absorbance, m is the slope of the calibration line, x is the concentration of the metal, and b is the intercept.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Supplemental_Modules_(Analytical_Chemistry)/Analytical_Sciences_Digital_Library/Contextual_Modules/Optical_Properties_of_Gold_Nanoparticles/01_Investigation_of_Gold_Nanoparticles/06_Determining_the_molar_extinction_coefficient_of_gold_nanoparticlesPurpose: The purpose of this exercise is to experimentally estimate the molar extinction coefficient of gold nanoparticles and determine what effect size has on the magnitude of the coefficient. Depen...Purpose: The purpose of this exercise is to experimentally estimate the molar extinction coefficient of gold nanoparticles and determine what effect size has on the magnitude of the coefficient. Depending on the chemical properties of the species in the sample, some light will be absorbed while the remainder will be transmitted to the detector where it is converted to an electrical signal that is proportional to the amount of light absorbed, called the absorbance.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Supplemental_Modules_(Analytical_Chemistry)/Analytical_Sciences_Digital_Library/In_Class_Activities/Introduction_to_Data_and_the_Analysis_of_Data/01_Student_Handout/07_Appendices
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Supplemental_Modules_(Analytical_Chemistry)/Analytical_Sciences_Digital_Library/In_Class_Activities/Biological_Mass_Spectrometry%3A_Proteomics/Instructors_Manual/Section_4%3A_MS-MS_and_De_Novo_Sequencing
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Supplemental_Modules_(Analytical_Chemistry)/Analytical_Sciences_Digital_Library/In_Class_Activities/Introduction_to_Data_and_the_Analysis_of_Data/01_Student_Handout/04_Part_IV%3A_Ways_to_Model_DataAssuming that the mean, ˉx, and the standard deviation, s, for the net weight of our samples of M&Ms are good estimates for the population’s mean, μ, and standard deviation, σ, what is the pr...Assuming that the mean, ˉx, and the standard deviation, s, for the net weight of our samples of M&Ms are good estimates for the population’s mean, μ, and standard deviation, σ, what is the probability that the contents of a 1.69-oz bag of plain M&Ms selected at random will weigh less than the stated net weight of 1.69 oz?
