Hach QP 1680-TOC/TNb Basis-Benutzerhandbuch Seite 9

4.1 Installation guidelines
Fire hazard. This product is not designed for use with flammable liquids.
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the
personal protective equipment appropriate to the chemicals that are handled. Refer to
the current safety data sheets (MSDS/SDS) for safety protocols.
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local,
regional and national regulations.
This instrument is sensitive to electromagnetic and electromechanical interference. These
interferences may have an effect on the analysis performance of this instrument. Do not put this
instrument near equipment that may cause interference.
Install the instrument:
• Indoors in a clean, dry, well-ventilated and temperature-controlled location
• In a location with a flat surface to prevent the unit from movement
• In a location with minimum mechanical vibrations and electronic noise
• In a location with no electromagnetic interferences from equipment such as transmitters, power
switching, etc.
• In an environmental enclosure that supplies protection from precipitation and direct sunlight
• In a location where there is sufficient clearance to make plumbing and electrical connections
• In a location where the display is easily seen by the user
• In a location with a compatible waste container for the drain tube
4.2 Prepare the reagents and standards
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the
personal protective equipment appropriate to the chemicals that are handled. Refer to
the current safety data sheets (MSDS/SDS) for safety protocols.
• Wear protective clothing, safety glasses or face protections and rubber gloves.
• Prepare the reagents in a fume hood.
• Use only glass or PTFE labware.
• Make sure that all of the bottles vent to air after installation.
• Make sure that the applicable accident prevention regulations are observed.
• Dispose of substances correctly and in accordance with the applicable regulations.
For NPOC and IC analysis, a solution of strong acid (e.g., HCl 3 mol/L) is added with a capacity to
transfer 300 ppm of IC from the sample vial (40 mL) into CO
approximately 750 NPOC samples. Adjust the acid concentration or amount of acid added based on
the sample pH or buffering strength to get a sample pH less than 2. Make sure that the sample pH is
less than 2 before the analysis.
W A R N I N G
C A U T I O N
C A U T I O N
N O T I C E
W A R N I N G
. Use 500 mL of acid solution to prepare
2
English 9