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Standardizing Analytical Methods

concentration calibration

Concentration Calibration

Introduction A series of collaborative learning activities and accompanying text that develop the concept of concentration calibration, utilizing the external standard, internal standard, and standard addition methods. The module is based primarily on flavonoids, particularly quercetin, as an example analyte. The activities are designed as in-class, small group exercises. An additional out-of-class activity is also available.…

Environmental Analysis – Lake Nakuru Flamingos: Pesticides

Could toxic pesticides like DDT be responsible for the deaths of large numbers of lesser flamingos at Lake Nakuru, Kenya? While many organochlorine pesticides including DDT have been banned for decades in the US due to their adverse effects on bird populations, especially bald eagles, they are still used for mosquito control in tropical regions of…

Calibration Methods

Students learn to: Identify different methods to calibrate instrumentation or analytical methodologies Choose proper calibration method depending on sample characteristics or instrument. Describe how standards and/or samples are prepared for each calibration method. Calculate concentration from information obtained from each calibration method

Principles of Calibration

Students learn to: explain the differences between external standard and standard addition calibration. identify when the use of an internal standard is necessary. discuss the merits and drawbacks of each type of calibration. calculate the concentration of an analyte given…