Thermo Scientific 8102BNUWP, 8103BNUWP, 8257BNU, 8302BNUMD, 8207BNU Instruction Manual

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Orion ROSS Ultra

pH Electrode

INSTRUCTION MANUAL

Orion 8102BNU, 8102SCU, 8103BNU, 8103SCU, 8104BNU, 8104SCU, 8115BNU, 8115SCU, 8135BNU, 8135SCU, 8156BNU, 8156SCU, 800500U

ROSS and the COIL trade dress are trademarks of Thermo Electron Corporation

Analyze • Detect • Measure • Control

™

ROSS and the COIL trade dress are trademarks of Thermo Electron Corporation.

AQUAfast, Cahn, EZ Flash, Ionalyzer, ionplus, KNIpHE, No Cal, ORION, perpHect, PerpHecT, PerpHecTion, pHISA, pHix, pHuture, Pure Water, Sage, Sensing the Future, SensorLink, ROSS Ultra, Sure-Flow, TEA Analyzer, Titrator PLUS, TURBO2 and Wine Master are registered trademarks of Thermo Electron Corporation.

1-888-pHAX-ION, A+, All in One, Aplus, AQUAsnap, AssuredAccuracy, AUTO-BAR, AUTO-CAL, AUTO DISPENSER, Auto-ID, AUTO-LOG, AUTO-READ, AUTO-STIR, Auto-Test, BOD AutoEZ, Cable-Free, CERTI-CAL, CISA, DataCOLLECT, DataPLUS, digital LogR, DirectCal, DuraProbe, Environmental Product Authority, Extra Easy/Extra Value, FAST QC, Flash Titration, Flash Titrator, GAP, GLPcal, GLPcheck, GLPdoc, ISEasy, KAP, LabConnect, LogR, Low Maintenance Triode, Minimum Stir Requirement, MSR, NISS, One-Touch, One-Touch Calibration, One-Touch Measurement, Optimum Results, Pentrode, pHuture MMS, pHuture Pentrode, pHuture Quatrode, pHuture Triode, Quatrode, QuiKcheK, rf link, ROSS, ROSS Resolution, SAOB, Smart CheK, Stacked, Stat Face, The Enhanced Lab, ThermaSense, Triode, TRIUMpH, Unbreakable pH, Universal Access are trademarks of Thermo.

Guaranteed Success and The Technical Edge are service marks of Thermo.

PerpHecT meters are protected by U.S. patent 6,168,707.

PerpHecT ROSS are protected by U.S. patent 6,168,707.

ORION Series A meters and 900A printer are protected by U.S. patents 5,108,578, 5,198,093 and German patents D334,208 and D346,753.

Sure-Flow electrodes are protected by European Patent 278,979 and Canadian Patent 1,286,720.

ionplus electrodes and Optimum Results solutions are protected by US Patent 5,830,338.

ROSS Ultra electrodes have patents pending.

ORION ORP Standard is protected by US Patent 6,350,367.

ORION Series A conductivity meters are protected by US Patent 5,872,454.

The specifications, descriptions, drawings, ordering information and part numbers within this document are subject to change without notice.

This publication supersedes all previous publications on this subject.

TABLE OF CONTENTS

General Information 1

Introduction 1 Required Equipment 2 Required Solutions 2

Using the Electrode 3

Electrode Preparation 3 Sample Requirements 4 Measuring Hints 5

pH Calibration & Measurement 7

General Calibration Procedure 7 Single Buffer Calibration 7 Two-Buffer Calibration 8 pH Measurement 9 Electrode Storage 9 Electrode Maintenance 10 Cleaning Electrode 10

Troubleshooting 11

Troubleshooting Guide 11 Assistance 12

Electrode Characteristics 13

Temperature Effects 13 Interferences 13

Ordering Information 15

Electrode 15 Accessories 26

Specifications 17

GENERAL INFORMATION

Introduction

This manual contains instructions for the Orion ROSS Ultra®series of pH electrodes. Operation and maintenance instructions for the following electrodes are included.

Orion Description

800500U ROSS Ultra Reference Electrode, glass body, pin tip

8102BNU ROSS Ultra Combination pH Electrode, 0-14 pH,

glass body, BNC

8103BNU ROSS Ultra Combination Semi-micro pH Electrode,

0-14 pH, glass body, BNC

8104BNU ROSS Ultra Combination pH Electrode, 0-14 pH,

glass body with rugged bulb, BNC

8115BNU ROSS Ultra Combination Semi-micro pH Electrode,

0-14 pH, epoxy body, BNC

8135BNU ROSS Ultra Combination Flat Surface Electrode,

0-14 pH, epoxy body, BNC

8156BNU ROSS Ultra Combination pH Electrode, 0-14 pH,

epoxy body, BNC

8102SCU ROSS Ultra Combination pH Electrode, 0-14 pH,

glass body, SC*

8103SCU ROSS Ultra Combination Semi-micro pH Electrode,

0-14 pH, glass body, SC*

8104SCU ROSS Ultra Combination pH Electrode, 0-14 pH,

glass body with rugged bulb, SC*

8115SCU ROSS Ultra Combination Semi-micro pH Electrode,

0-14 pH, epoxy body, SC

8135SCU ROSS Ultra Combination Flat Surface Electrode,

0-14 pH, epoxy body, SC

8156SCU ROSS Ultra Combination pH Electrode, 0-14 pH,

epoxy body, SC

* Screw cap requires cable, Orion 91CBNC to connect to

BNC meters.

The ROSS Ultra series of electrodes provides readings stable to

0.01 pH in less than 30 seconds, even in the extreme case of samples varying from one another by 50 °C or more. Results are three to five times more precise than those obtained with conventional electrodes.

Required Equipment

Meter — Any Orion pH or ion selective meter, or other pH/ISE meter

with appropriate connectors.

Electrode — ROSS Ultra

Combination electrodes or ROSS Ultra

reference electrode with ROSS 8101 ROSS pH Half-cell electrode.

ATC Probe — for temperature measurement. Select ATC probe compatible with meter.

Beakers — Plastic or glass.

Magnetic Stirrer — Suggested for precision measurements.

Required Solutions

pH Buffers — Two are recommended for precise measurement. The

first, near the electrode isopotential point (pH 7) and the second near the expected sample pH (e.g., pH 4 or 10).

ROSS

™

Internal Filling Solution - 3M KCl, Orion 810007. Do not use

any filling solution which contains silver. (Electrode damage may result.)

Figure 1: Orion 8102BNU ROSS Ultra Combination Electrode

Fill Hole

ROSS Ultra

Internal Reference

pH Sensing Bulb

Filling Solution Chamber

Ceramic Reference Junction

USING THE ELECTRODE

Electrode Preparation

1. Remove the protective shipping cap from sensing element and save for storage.

2. Clean any salt deposits from exterior by rinsing with distilled water.

3. Uncover fill hole and add ROSS

™

Filling Solution, Orion 810007, to electrode. See Figure 2. To maintain an adequate flow rate, the level of filling solution must cover the end of the coil and be at least one inch above the sample level on immersion. The fill hole should be open whenever the electrode is in use.

4. Place the electrode in the electrode holder and suspend in air for 15 minutes to thoroughly wet the reference junction. Once the junction is wet, do not allow the electrode to dry out.

5. Carefully shake down the electrode (as a clinical thermometer) to remove air bubbles.

6. Soak electrode in pH Electrode Storage Solution, Orion 910001, for one hour.

7. Connect electrode to meter.

Figure 2: Filling an Electrode

Sample Requirements

One of the benefits of the ROSS Ultra®pH Electrode is that the reference electrode filling solution composition may be changed depending on sample requirements.

The ROSS

™

pH Electrode Filling Solution, Orion 810007 is 3M KCl. For solutions with components that precipitate in the presence of chloride ion, the ROSS Ultra pH Electrode could be filled with 10% KNO

, Orion 900003.

Samples should be aqueous if using epoxy body electrodes (e.g., Orion 8115, 8135, 8156 ROSS Ultra electrodes).

In organic solutions, use an all glass ROSS Ultra Electrode (e.g., Orion 8102, 8103 and 8104 ROSS Ultra electrodes). For good results a minimum of 20% water must be present in the sample. If there is a great deal of drift when using the ROSS Ultra Electrode filled with ROSS Filling Solution, Orion 810007, try filling the electrode with a mixture of methanol and water saturated with KCl.

Figure 3: Measuring Hints

Fill hole should

be uncovered

Filling solution level must be higher than sample level

Fresh pH buffer

Stir all samples

and buffers

Reference junction must be immersed in sample or buffer

Place insulation between stirrer and beaker

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