Hach PLATINUM Series, Manual

Page 1: ...Cat No 51910 88 PLATINUM SERIES pH ELECTRODE Hach Company 1999 2002 All rights reserved Printed in China te dk 02 05 2ed...

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Page 3: ...mple Chamber Kits 14 1 6 2 Sample Bottles 15 1 7 General Applications 15 Section 2 Applications 17 pH Water and Wastewater 19 pH High Purity Water 27 pH Low Ionic Strength LIS Water 35 Section 3 Elect...

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Page 5: ...C 32 to 113 F Occasional Use 0 to 100 C 32 to 212 F Storage 40 to 50 C 40 to 122 F Reference Half Cell Ag AgCl 2 2 M KCl in 40 glycerol gel Dimensions Tip Diameter 12 3 mm 0 485 inches Tip Length 116...

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Page 7: ...ion If multiple hazards exist this manual will use the signal word Danger Caution Note corresponding to the greatest hazard DANGER Indicates a potentially or imminently hazardous situation which if no...

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Page 9: ...te pH measurement Figure 1 sension Platinum Series pH Electrodes Platinum Series pH Electrode with Temperature Probe for use with sension pH meters Cat No 51910 00 Platinum Series pH Electrode with Te...

Page 10: ...electrode a frit restricts the release of electrolyte into the sample In the Platinum Series electrodes the medium viscosity electrolyte gel acts as a restriction device Fresh reference electrolyte i...

Page 11: ...e 2 Assembling the Platinum Series Electrode Note The electrode will be automatically primed by screwing the dispenser unit onto the electrode body 3 If electrolyte gel is not visible at the reference...

Page 12: ...layer electrodes should be conditioned for several minutes in a solution comparable to the sample in terms of pH and ionic strength Some samples may require special conditioning See specific applicat...

Page 13: ...the dispenser until fresh gel emerges and carefully rinse the electrode to prevent sample contamination 1 4 Measuring Hints These suggestions will improve the accuracy of your calibration and sample m...

Page 14: ...curate measurements than a single point calibration 1 5 Checking the Slope After calibrating the electrode with fresh buffer check the slope using the sension meter s calibration review option A slope...

Page 15: ...include Monitoring the pH of low ionic strength liquids such as boiler feedwater and condensate Environmental and ecological studies of natural waters such as lakes rivers precipitation and streams W...

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Page 17: ...17 Section 2 Applications...

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Page 19: ...ure contains instructions for the sension 2 However any Hach sension meter may be used for this analysis 2 Prime the electrode by pushing the dispenser button until gel comes out of the reference junc...

Page 20: ...ggle to the number of desired decimal places then EXIT to leave setup 6 In three 50 mL beakers or cups prepare buffers of 4 0 7 0 and 10 0 pH Note The sample pH should fall within the range of the cal...

Page 21: ...n deionized water and blot dry 9 Place the electrode in pH 7 0 buffer Press ENTER The display shows Stabilizing Note Temperature variation causes changes in buffer pH Hach sension meters correct for t...

Page 22: ...the electrode in the 4 0 or 10 0 pH buffer Press ENTER 12 After the last calibration point has stabilized and the display reads Standard 3 press EXIT For a three point calibration repeat steps 10 11 w...

Page 23: ...3 mV per pH unit Checking Calibration Accuracy Returning the electrode to a calibration buffer and determining the pH provides a good test of the system Rinse and recondition the electrode before meas...

Page 24: ...ge 48 Summary of Method Water with relatively high conductivity typically has a fairly high buffer capacity Slight pH changes due to absorption of carbon dioxide are usually not significant If the sam...

Page 25: ...lue 15 pkg 22271 95 Buffer Solution pH 4 red 500 mL 22834 49 Buffer Solution pH 7 yellow 500 mL 22835 49 Buffer Solution pH 10 blue 500 mL 22836 49 Singlets pH 4 01 7 00 10 pkg 27699 20 Singlets pH 7...

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Page 27: ...age 10 for assembly instructions Note The Hach sension 4 meter is used for this analysis 2 Prime the electrode by pushing the dispenser button until gel comes out of the reference junction Rinse exces...

Page 28: ...o the number of desired decimal places then EXIT to leave setup 6 In three 50 mL beakers or cups prepare buffers of 4 0 7 0 and 10 0 pH Note The sample pH should fall within the range of the calibrati...

Page 29: ...ode in deionized water and blot dry 9 Place the electrode in pH 7 0 buffer Press ENTER The display shows Stabilizing Note Temperature variation causes changes in buffer pH Hach sension meters correct...

Page 30: ...ding using default meter parameters and the specified resolution To override the default meter parameters see the sension4meter manual 11 Place the electrode in 4 0 or 10 0 pH buffer Press ENTER 12 Af...

Page 31: ...er Prime the reference junction by clicking the pump until fresh gel emerges 16 Rinse the electrode with deionized water or sample and blot dry 17 Place the electrode into the clean LIS Sample Chamber...

Page 32: ...the inlet tube from the sample source to the sample chamber Note The inlet tube extends directly to the bottom of the sample chamber 20 Adjust inlet flow to slowly fill the chamber from the bottom up...

Page 33: ...of pH 7 0 and two electrodes with a single sension 2 a single operator obtained a standard deviation of 0 05 pH Each electrode was exposed to seven test solutions with no rinsing in between and with a...

Page 34: ...1 each 51899 00 OPTIONAL REAGENTS Buffer Powder Pillow pH 4 01 color coded red 15 pkg 22269 95 pH 6 86 15 pkg 14098 95 pH 7 00 color coded yellow 15 pkg 22270 95 pH 10 00 color coded blue 15 pkg 2227...

Page 35: ...y instructions Note The Hach sension 2 meter is used for this analysis 2 Prime the electrode by pushing the dispenser button until gel comes out of the reference junction Rinse excess gel from the tip...

Page 36: ...toggle to the number of desired decimal places then EXIT to leave setup 6 In three 50 mL beakers or cups prepare buffers of 4 0 7 0 and 10 0 pH Note The sample pH should fall within the range of the...

Page 37: ...ectrode in deionized water and blot dry 9 Place the electrode in pH 7 00 buffer Press ENTER The display shows Stabilizing Note Temperature variation causes changes in buffer pH Hach sension meters cor...

Page 38: ...e electrode in the 4 0 or 10 0 pH buffer Press ENTER 12 After the last calibration point has stabilized and the display reads Standard 3 press EXIT Note For a three point calibration repeat steps 10 1...

Page 39: ...t dry 17 Fit the electrode into the clean LIS sample chamber lid and plug inlet and outlet ports with stoppers 18 If not using a sample collection bottle that fits the sample chamber transfer the samp...

Page 40: ...standard solution of pH 7 1 and two electrodes with a single sension2 a single operator obtained a standard deviation of 0 006 pH Each electrode was exposed to seven test solutions with no rinsing in...

Page 41: ...pkg 14098 95 pH 7 00 color coded yellow 15 pkg 22270 95 pH 10 00 color coded blue 15 pkg 22271 95 Buffer Solution pH 4 red 500 mL 22834 49 Buffer Solution pH 7 yellow 500mL 22835 49 Buffer Solution p...

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Page 43: ...easuring a new sample refresh the reference electrolyte gel by clicking the dispenser until fresh gel emerges Carefully rinse the electrode to prevent sample contamination Overnight storage Store the...

Page 44: ...trode storage solution Cat No 27565 49 3 2 Cleaning the Electrode A contaminated glass bulb or fouled electrode may cause slow response times Clean the electrode only after conducting the steps descri...

Page 45: ...ough them If the electrode has been sitting in a sample for several weeks the reference gel will become diluted In this case discard the cartridge and replace it with a fresh one If these steps fail t...

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Page 47: ...at the glass liquid interface At a constant temperature this potential varies linearly with the pH of the solution being measured The change in potential per pH unit is the slope of the electrode The...

Page 48: ...ted with the reading at the indicated sodium concentration Note For indicated readings below pH 11 sodium error is negligible for solutions with a sodium concentration below 0 1 M Example The meter in...

Page 49: ...h a lint free cloth or compressed air Reference junction is blocked Press the electrolyte dispenser and see if gel is expelled from the reference junction tube If the junction is blocked see Section 1...

Page 50: ...t The pH cable though shielded can act as an antenna Install a shorting cap on the unused meter terminal Do not use stirrers in LIS solutions Avoid static electricity nearby pumps power supplies etc p...

Page 51: ...ds Keep sample and standards at same temperature Standards contaminated Prepare fresh standards High offset Leakage pathway results in stray voltage via internal electrical short Return electrode unde...

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Page 53: ...g stored between uses 10 What is the electrode slope during a typical calibration 11 If a new electrode has it been conditioned according to instructions 12 If the electrode has been in use for a whil...

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Page 55: ...ydroxyl OH ions Anion A negatively charged ion i e NO3 Cl Base A chemical compound that contributes hydroxide ions OH to an aqueous solution or causes the pH to be greater than 7 0 Buffer 1 A compound...

Page 56: ...or the sample before dilution Electrolyte A solution made of dissolved ions that is used to facilitate electrical conductance and ionic transport The composition is usually potassium chloride KCl sodi...

Page 57: ...e hydrogen ion concentration Potential The capacity of a system to perform work When two ions of opposite charge are separated by a distance there is a potential developed from the tendency of the ion...

Page 58: ...entimeter mS cm and it is a measure of how readily a sample conducts electricity More concentrated solutions conduct more electricity and have higher conductivity Sodium error alkaline error Occurs in...

Page 59: ...At Hach Company customer service is an important part of every product we make With that in mind we have compiled the following information for your convenience 59 General Information...

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Page 61: ...ic Rim Telephone 970 669 3050 FAX 970 669 2932 In Europe the Middle East or Mediterranean Africa HACH Company c o Dr Bruno Lange GmbH Willst tterstr 11 D 40549 D sseldorf Germany Telephone 49 0 211 52...

Page 62: ...ephone 515 232 2533 FAX 515 232 1276 In Canada Hach Sales Service Canada Ltd 1313 Border Street Unit 34 Winnipeg Manitoba R3H 0X4 800 665 7635 Canada only Telephone 204 632 5598 FAX 204 694 5134 E mai...

Page 63: ...LAR PURPOSE LIMITATION OF REMEDIES Hach shall at its option replace or repair nonconforming products or refund all amounts paid by the buyer THIS IS THE EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY LIM...

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