Hach DR/850, Procedures Manual, Page: 7 / 460

7
INTRODUCTION
This manual is divided into five sections:
Section 1 Chemical Analysis Information
This section applies to all the procedures. It provides background
information and reference/review material for the technician or chemist.
Commonly used techniques are explained in detail.
Section 2 Sample Pretreatment
This section provides a brief overview of sample pretreatment and two
USEPA digestions. A brief discussion of the Hach Digesdahl Digestion
Apparatus and the Hach Distillation Apparatus is included.
Section 3 Waste Management and Safety
Section 3 includes information on waste management, regulations, waste
disposal and resources on waste management. The Safety portion covers
reading an MSDS and general safety guidelines.
Section 4 Procedures
Section 4 contains step-by-step illustrated instructions for measuring
parameters. The steps also include helpful notes. Each procedure contains
information on sample collection, storage and preservation, accuracy
checks, possible interferences, summary of method and a list of the
reagents and apparatus necessary to run the test.
Section 5 Ordering Information
This section provides information needed for ordering, shipping, return of
items and Hach trademarks.
Before attempting the analysis procedures the
analyst should read the instrument manual to learn
about the colorimeter’s features and operation.