'Particular solvent' diaporamas de présentation

Questioned Documents Unit

Questioned Documents Unit. Objectives : Determine the origin of a writing sample using the 12 exemplars. Do Now : What kind of documents will investigators observe in order to connect suspects to a crime?. Objectives : Determine the origin of a writing sample using the 12 exemplars.

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Chapter 12

Chapter 12. Do Now . Use our mixture of salt, pepper, and iron, and marbles to come up with a definition for mixtures. Mixtures. A mixture is a physical combination of materials that can be separated by physical means.

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SOLUTIONS

SOLUTIONS. A solution is a homogeneous mixture ; particles are evenly distributed throughout the mixture. Amounts may vary between solutions (variable proportions) But The ratio of amounts is the same throughout a particular solution

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Mixtures and Solutions

Mixtures and Solutions. Types of mixtures. Heterogeneous mixture: Heterogeneous mixtures do not blend smoothly. Individual substances can still be seen Suspension: A suspension is a heterogeneous mixture where particles will settle to the bottom if left undisturbed. Example: sand in water.

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Crystallization

Crystallization. Crystallization. Process of producing crystals from a homogeneous phase which is obtained from a solution Capable of producing bioproducts at very high purity and considered to be a polishing step and a purification step Two different application of crystallization:

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Drug Analysis

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Lec.11

Lec.11. Liquid State & Solution . Liquid State & Solution . Solution may be defined as a homogeneous mixture of two or more substances whose composition can be continuously varied within certain limits.

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All forms of chromatography involve 2 phases The Two Phases 1. stationary (absorbent) phase

Chromatography is a method of physically separating mixtures of gases, liquids, or dissolved substances. Chromatography can be used to identify drugs, poisons and many other substances. Separation is determined by the molecular size and/or charge. All forms of chromatography involve 2 phases

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