Written specifically to accompany Johll'sInvestigating Chemistry, this manual contains a wide variety of innovative experiments covering the basic topics of introductory chemistry and forensic science. Detailed instructions allow students to record their observations and reach conclusions while reinforcing key concepts.

Safety in the Laboratory

vii

Measurements

1

(8)

Part A Mass Determination

Part B Volume of Rectangular and Cylindrical Solids and Your Laboratory Room

Part C The Graduated Cylinder and Volume of an Irregularly Shaped Solid

Part D Relative Distances of Crime Scene Evidence and the Pythagorean Theorem

Polymer Identification I

9

(12)

Part A Preparation and Density Determination of Ethanol/H2O Solutions (The Pipette)

Part B Preparation and Density Determination of CaCl2 Solutions (The Buret)

Part C Density of Polymers with Respect to the Above Liquids

Part D Polymer Flame Tests

Part E Identifying an Unknown Polymer Sample

Soil Examination

21

(10)

Part A Visual Characteristics

Part B pH Determination

Part C Color Determination

Part D Density Gradient

Part E Particle Size Distribution

Thin Layer Chromatography Analysis

31

(12)

Part A Prepare TLC Samples

Part B Prepare TLC Plates and Separate Samples

Part C Prepare TLC Plates and Separate Samples Using a Different Solvent System

Part D Examine Results

Polymer Identification II (FTIR)

43

(6)

Part A Acquisition of FTIR Spectra

Part B Identification of Major FTIR Spectral Peaks

Part C Identification of an Unknown Polymer Sample

Urine and Blood Analysis

49

(10)

Part A Qualitative Analysis of Blood and Urine Electrolytes

Part B Qualitative Analysis of Urine Proteins, Glucose, and Ketones

Part C Analysis of Unknown Blood and Urine Samples

Blood Alcohol Concentration

59

(6)

Part A Determining Blood Alcohol Concentration Using Potassium Dichromate

Part B Infrared Spectra

Arson and Accelerants

65

(8)

Part A Preparation of Arson Samples

Part B GC/MS Analysis of Arson Samples

Part C Accelerant Burn Rates and Patterns

Explosives

73

(10)

Part A Analysis of Black Powder

Part B Analysis for Nitrocellulose

Part C Analysis of Burned Samples

Part D Analysis of Sugar/Chlorate Explosive

Identification of Blood

83

(8)

Part A Preparation of Solutions and Samples

Part B Analysis of Samples and Blood Dilutions

Part C Analysis of Cleaned Bloodstains

Fingerprints

91

(12)

Part A Fingerprints and Light Sources

Part B Fingerprint Powder

Part C Iodine Fuming

Part D Ninhydrin Development

Part E Superglue Development

Part F Silver Nitrate Development

Part G Sticky-side of Tape Development

Part H Unknown Prints

Part I Rolling Prints (Optional)

Heat Capacity and Fire Fighting

103

(12)

Part A Determination of the Calorimeter Constant

Part B Determination of the Specific Heat Capacity of Concrete and Steel

Bloodstain Pattern Analysis

115

(8)

Part A Determining Droplet Volume

Part B Stain Size

Part C Angle of Impact

Part D Medium-Velocity Spatter

Glass

123

(8)

Part A Glass Comparisons

Part B Glass Identification

Part C Determining Glass Density

Part D Determining Glass Refractive Index

Fibers

131

(10)

Part A Microscopic Analysis

Part B Dry-Twist Test

Part C Solubility Tests

Part D Instrumental Analysis

Part E Unknown Fibers

UV-vis Analysis of Food Dyes

141

(8)

Part A Preparation of Standards and Samples

Part B Measurement of Absorbances

Gunshot Residue

149

(10)

Part A Prepare Color Test Solutions

Part B Unburned Gunpowder Samples

Part C Burned Gunpowder Samples

Part D Lead Analysis

Introduction to Chemical Instrumentation

159

(8)

Part A Prepare Pill Powder

Part B Filter Pill Sample and Prepare UV-vis Sample

Part C Analyze Pill Sample Using UV-vis

Part D Prepare GC/MS Sample and Analyze

Part E Analyze Pill Sample Using Fourier Transform Infrared Spectrophotometry

Microscopy

167

(10)

Part A Stereoscopic Microscope Introduction

Part B Stereoscopic Microscope Operation

Part C Compound/Biological Microscope Introduction

Part D Compound/Biological Microscope Setup (Kohler Illumination)

Part E Compound/Biological Microscope Operation

Footwear Impressions and Physical Matches

177

(8)

Part A Paper Footwear Impression

Part B Tape Footwear Impression

Part C 2-D Footwear Impression Comparisons

Part D 3-D Footwear Cast

Part E Physical Match with Paper

Part F Physical Match with Sticks

Part G Completion of 3-D Footwear Cast

Microscopy II

185

(8)

Part A Stereoscopic Microscope

Part B Polarized Light Microscope

Part C Microscopic Measurements

Part D Comparison Microscope (Optional)

Hair

193

(10)

Part A Human Scalp Hair Comparison

Part B Animal Hair Identification

Firearms

203

(6)

Part A Identification of Ammunition

Part B Disassembling a Cartridge

Part C Comparing Bullet and Casing Markings

Questioned Documents

209

Part A Preparing Handwriting Exemplars

Part B Preparing Signature Exemplars

Part C Indentions

Part D Obliterations

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Investigating Chemistry Lab Manual

9780716774853

0716774852

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