Agilent Technologies VGA 77 Bedienungsanleitung

Agilent Vapor

Generation

Accessory VGA 77

and VGA 77P

User’s Guide

2 Agilent Vapor Generation Accessory VGA 77 and VGA 77P User’s Guide

Notices

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and retrieval or translation into a

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agreement and written consent from

Agilent Technologies, Inc. as governed

by United States and international

Manual Part Number

8510104700

Edition

Thirteenth edition, December 2016

Agilent Technologies Australia (M) Pty

Ltd

679 Springvale Rd

Mulgrave, Victoria 3170, Australia

www.agilent.com

Warranty

The material contained in this

document is provided “as is,” and is

subject to being changed, without

notice, in future editions. Further, to

the maximum extent permitted by

applicable law, Agilent disclaims all

warranties, either express or implied,

with regard to this manual and any

information contained herein,

including but not limited to the

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Technology Licenses

The hardware and/or software

described in this document are

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(November 1995), as applicable in any

technical data.

Safety Notices

A CAUTION notice denotes a hazard.

It calls attention to an operating

procedure, practice, or the like that, if

not correctly performed or adhered to,

could result in damage to the product

or loss of important data. Do not

proceed beyond a CAUTION notice

until the indicated conditions are fully

understood and met.

A WARNING notice denotes a

hazard. It calls attention to an

operating procedure, practice, or the

like that, if not correctly performed or

adhered to, could result in personal

injury or death. Do not proceed

beyond a WARNING notice until the

indicated conditions are fully

understood and met.

WARNING

CAUTION

Contents

Agilent Vapor Generation Accessory VGA 77 and VGA 77P User’s Guide 3

Contents

1. Safety Practices and Hazards 7

General 7

Verifying Safe State 7

Hazard Warnings 8

Electrical Hazards 8

Chemical Hazards 9

Warning Messages 9

Information Symbols 10

Color Coding 11

Electromagnetic Compatibility 11

EN55011/CISPR11 11

ICES/NMB-001 12

2. Introduction 13

About the VGA 77 and VGA 77P 13

About this Manual 14

Specifications 14

Environmental 14

Power 15

Gas Supplies 15

Weights and Dimensions 16

3. Getting Started 17

Unpacking 17

Contents

4 Agilent Vapor Generation Accessory VGA 77 and VGA 77P User’s Guide

Installation 18

Installation Checklist 19

Gas Supply Requirements 20

Power Supply Requirements 22

Installing the Pump Unit 24

Installing a Reagent Module 24

Installing the Drain Tubing 25

Installing the VGA 77 Pump Tubing 27

Installing the Burner Clamp 29

Installation of Zeeman Adapter for 240Z/280Z AA 33

Installing the Cell 36

Connecting the Gas/liquid Separator Outlet 38

Connecting a Mercury Trap (for AA only) 41

Connection to the Autosampler 42

4. Operation 43

Setup 44

General Setup 44

Pump Adjustment 44

AA Setup 47

ICP Setup 49

Operation 51

Automatic Operation 52

Shutting Down 53

Changing Modules 54

5. Analytical Notes 55

Background 56

Contents

Agilent Vapor Generation Accessory VGA 77 and VGA 77P User’s Guide 5

Factors Affecting the Formation of Hydrides 57

Acid Concentration 57

Oxidation State 57

Interferences 58

Contamination 59

Memory Effects 59

Background Absorption (AA only) 59

Laboratory Procedures 60

General 60

Standards 61

Reductant—Sodium Borohydride 61

Pump Tubing 61

Sources (AA only) 62

Basic Methods 62

Antimony 62

Arsenic 63

Bismuth 64

Mercury 64

Selenium 66

Tellurium 67

Tin 68

Additional Notes 69

References 69

Additional References 69

6. Maintenance and Spare Parts 71

Cleaning Procedures 71

General 71

Absorption Cell 72

Contents

6 Agilent Vapor Generation Accessory VGA 77 and VGA 77P User’s Guide

Gas/Liquid Separator 73

Tubing 75

Replacement Procedures 76

Pump Tubes 76

Reaction Coil 76

Uptake Capillary Tubes 77

Fuses 77

Spare Parts 79

7. Appendix – AA Performance Log 81

Safety Practices and Hazards

Agilent Vapor Generation Accessory VGA 77 and VGA 77P User’s Guide 7

1. Safety Practices and Hazards

General 7

Verifying Safe State 7

Hazard Warnings 8

Color Coding 11

Electromagnetic Compatibility 11

General

Operation of the VGA 77 with an Atomic Absorption spectrometer

(AA) or VGA 77P with an Inductively Coupled Plasma Optical

Emission Spectrometer (ICP-OES) involves the use of compressed

gases and hazardous materials, including corrosive fluids. Unskilled,

improper, or careless use of equipment can create explosion hazards,

fire hazards or other hazards which can cause death, serious injury

to personnel, or severe damage to equipment and property.

Appropriate safety practices have been included in this operation

manual and your spectrometer operation manual, to help users

operate the equipment safely. Read all safety practices thoroughly

before attempting to operate your system.

If the equipment is used in a manner not specified by the

manufacturer, the protection provided by the equipment may be

impaired.

Do not position the equipment so that it is difficult to operate the

disconnecting device.

Verifying Safe State

The following general safety precautions must be observed during all

phases of operation, maintenance and service of this instrument.

Safety Practices and Hazards

8 Agilent Vapor Generation Accessory VGA 77 and VGA 77P User’s Guide

To ensure continued safety of the instrument after maintenance or

service procedures verify the instrument is returned to a safe state

for the user. This includes running performance checks to verify the

instruments safety systems are functioning correctly. Check the

general condition of the instrument during operation for wear or

signs of corrosion that are likely to inhibit function or safety.

Failure to comply with these precautions or with specific warnings

elsewhere in this manual violates safety standards of design,

manufacture, and intended use of the instrument. Agilent

Technologies assumes no liability for the customer’s failure to

comply with these requirements.

Hazard Warnings

In addition to the hazard warnings contained in your spectrometer

operation manual, specific hazard warnings have been included in

this operation manual. These warnings state the hazard, describe

how to avoid it and specify the possible consequences of not

following the instructions. Read all warnings carefully and observe

them at all times.

Electrical Hazards

The VGA 77 contains electrical circuits, devices and components

operating at dangerous voltages. Contact with these circuits, devices

and components can cause death, serious injury or painful electric

shock. Covers that are retained by screws on the VGA 77 may be

opened only by Agilent field service engineers.

Use of the wrong supply voltage, connection of the accessory to an

incorrectly wired supply outlet, or lack of proper electrical grounding

can create a fire or shock hazard that can cause death, serious injury,

or serious damage to equipment.

Always use a 3-wire outlet with a ground connection that is

adequately rated for the load.

The installation must comply with local, state and national safety

regulations.

Safety Practices and Hazards

Agilent Vapor Generation Accessory VGA 77 and VGA 77P User’s Guide 9

Before connecting the VGA 77, make sure the voltage selector is

correctly set for the mains supply to which you are connecting

the accessory (see Figure 2 on Page 23).

A blown fuse should be replaced with one of the same size and rating

stated in the text near the fuse holder.

Chemical Hazards

Vapor generation methods of analysis involve the generation of toxic

hydrides and use materials which are toxic, highly corrosive or

otherwise hazardous. Careless, improper, or unskilled use of such

materials can cause serious personal injury.

Always ensure that laboratory safety practices governing the use,

handling and disposal of such materials are strictly observed. These

safety practices should include the wearing of appropriate safety

clothing.

In the VGA 77 system, highly concentrated acids are pumped under

pressure. If a leak occurs, acid could be sprayed from the system,

causing serious personal injury. Always wear approved safety glasses

warranted to protect the eyes.

Never pump concentrated sulfuric acid through the VGA 77 system.

Warning Messages

The following symbol may be used on warning labels attached to the

Agilent VGA 77. When you see this symbol, refer to the relevant

operation or service manual for the correct procedure referred to by

that warning label.

Safety Practices and Hazards

10 Agilent Vapor Generation Accessory VGA 77 and VGA 77P User’s Guide

A triangular symbol indicates a warning. The meanings of the

symbols that may appear alongside warnings in the documentation

or on the instrument itself are as follows:

Corrosive liquid

Electrical shock

Explosion hazard

Eye hazard

Fire hazard

Heavy weight

(danger to feet)

Heavy weight

(danger to hands)

Hot surface

Moving parts

Noxious gas

Sharp object

Information Symbols

A ‘Note’ is used to give advice or information.

I Mains power on

0 Mains power off

Fuse

Single phase alternating current

Caution, disconnect all supplies, risk of electric shock

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