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2.1

Survey of the titration modes

799 GPT Titrino: Titration, dosing and measuring modes

2 Titration, dosing and measuring modes

This chapter gives you a survey over the titration, dosing and

measuring modes. You will find the parameters of all modes.

The standard values are printed in bold face in the following

tables.

2.1 Survey of the titration modes

DET

Dynamic Equivalence point Titra-

tion

MET

Monotonic Equivalence point Titra-

tion

Titration

Reagent feeding:

Variable volume increments, depend-

ing on the slope of the curve.

Drift controlled ("equilibrium titration")

and/or

after a fixed equilibration time.

Reagent feeding:

Constant volume increments, inde-

pendent of the slope of the curve.

Drift controlled ("equilibrium titration")

and/or

after a fixed equilibration time.

Evaluation

The evaluation of EP' s is based on

the zero crossing of the second de-

rivative with a Metrohm correction for

the distortion of the curve from super-

imposed jumps. Can be combined

with selectable recognition criteria.

Recognition criteria:

as for MET

The evaluation of EP's is based on

the Fortuin interpolation.

Recognition criteria:

all EP's

only the last EP

only the greatest EP

EP windows

Applications

Suitable titration mode for most prob-

lems. Specially recommended if

jumps lie very close together and for

very flat jumps.

Note:

The reagent feeding algorithm

is based on measured data. The

curve should therefore not deviate

markedly from S-shape.

For

•

slow titration reactions (diazota-

tions, coupling reactions)

•

sluggish electrode response.

V/mL

U/mV

V/mL

U/mV

Содержание 799 GPT Titrino

Страница 1: ...799 GPT Titrino Short instructions for use CH 9101 Herisau Switzerland E Mail info metrohm com Internet www metrohm com 799 GPT Titrino Short Instructions for Use 8 799 1023 04 2002 pkl...

Страница 2: ...1 Survey of the titration modes 12 2 2 Mode DET and MET parameters 14 2 3 Mode SET parameters 15 2 4 Mode KFT parameters 16 2 5 Mode STAT parameters 17 2 6 Mode DOS parameters 19 2 7 Mode DOC paramete...

Страница 3: ...tting started 1 Summary of the most important signs Signs in the Titrino dialog Title of inquiry groups Press ENTER to go to the inquiries Values can be chosen with keys or Signs that are used in the...

Страница 4: ...roup monitoring is inverted which means that the cursor is placed on this line You can move the cursor up and down with the and keys Set the cursor to auxiliaries and open this inquiry group with ENTE...

Страница 5: ...librium titration After the titration the equivalence points are evaluated automatically You are now ready to titrate You titrate with the internal dosing unit D0 i e the Exchange Unit on the Titrino...

Страница 6: ...EP conc titrant molar mass sample size If you made a typing mistake you can delete the sym bols one by one with CLEAR Confirm the formula with ENTER You may enter a text for the result output see page...

Страница 7: ...the equivalence point you find its ERC see Instruc tions for Use page 21 22 and its volume Quit the curve display with or key Selection of the automatic report output DEF ENTER or ENTER 2 x QUIT If y...

Страница 8: ...to go to this inquiry group The absolute stop volume It can be used as a safety volume to prevent overflow of the titration vessel Enter a value for the stop volume that appears suitable for your titr...

Страница 9: ...method name Enter an identification for your method e g HCl If you made a typing error you can delete the characters one by one with CLEAR Quit the text input with QUIT when you completed your name C...

Страница 10: ...can be organized in various directories if every user wants to store his methods on his own card for exchanging methods between various laborato ries apparatus and or users The card has a battery whi...

Страница 11: ...s 121892 Current directory PRINT CARD ENTER name of the current directory remaining bytes on this card cd 799 GPT Titrino 01102 799 0010 date 2002 04 08 time 07 50 card label Appl 799 dev label direct...

Страница 12: ...th a Dosing Unit resp PARAM ENTER or ENTER 2 x QUIT Recall the method HCl from the user memory Press USER METH then ENTER Select the method name HCl with the keys or and recall the method with ENTER T...

Страница 13: ...en selected Press PREP again In the display appears exter nal D1 prep Press the key DOS on the Titrino The external dos ing unit D1 doses If you press the key STOP FILL on the Titrino it will fill aga...

Страница 14: ...he slope of the curve Drift controlled equilibrium titration and or after a fixed equilibration time Evaluation The evaluation of EP s is based on the zero crossing of the second de rivative with a Me...

Страница 15: ...PX in mL Evaluation of rates dV dt in the set time windows and the mean rate over the entire measuring point list volumes associated with a preset time fix V times associated with a preset fraction of...

Страница 16: ...C stop conditions stop V stop V factor stop pH stop EP filling rate Type of stop volume absolute or relative Volume for absolute stop volume Factor for calculation of relative stop volume factor smpl...

Страница 17: ...absolute start volume Factor for calculation of relative start volume factor smpl size Dosing rate for start volume Waiting time after start volume Extraction time Selection of the dosing unit Measur...

Страница 18: ...rate for start volume Waiting time after start volume Extraction time Selection of the dosing unit Polarization current for Ipol or voltage for Upol in 10 mV intervals Performing of electrode test Ti...

Страница 19: ...election of dosing unit Measuring input for pH and U Temperature abs rel OFF 0 999 99 mL 0 999 999 0 01 150 mL min max 0 999 999 s 0 999 999 s pH 0 00 20 00 OFF 0 2000 mV 0 0 200 0 A 0 01 150 mL min O...

Страница 20: ...ctions as above Monitoring of temperature same actions as above Assignment of output L10 to monitored quantity Assignment of output to violated limit Set a signal when limits are violated For lines L1...

Страница 21: ...stics Statistics calculation see at DET page 14 monitoring meas mode meas input low lim pH up lim pH action temperature low lim up lim action assign output L10 violated limit output L10 assign output...

Страница 22: ...t for pH and U Temperature pH 0 00 20 00 init 0 2000 mV 0 0 200 0 A pH 0 00 20 00 OFF 0 2000 mV 0 0 200 0 A 0 300 999 999 s pH 0 01 0 25 20 00 OFF 1 15 2000 mV 0 1 6 200 A 0 01 150 mL min max 0 01 5 9...

Страница 23: ...req smpl size Limit smpl size activate pulse Request of identifications after start Request of sample size after start Limit control of sample size Pulse output on I O line L6 id1 id1 2 all OFF value...

Страница 24: ...be held and an info appears in the display Preparation of the dosing unit Switching the stirrer ON OFF method name 0 999 999 s inf active inactive pulse OFF active inactive pulse OFF up to 16 characte...

Страница 25: ...limits Enter values of calculation variables with C FMLA 1 9 RS1 or up to 8 ASCII characters 0 2 5 ppm g L mg mL mg pc mol L mmol L g mg mL s mL min no unit or up to 6 ASCII characters ON OFF 0 0 999...

Страница 26: ...Volume drift for KFT and SET with conditioning Temperature Dispensed start volume Asymmetry pH pH calibration Electrode slope pH calibration Volume at the point of the curve with maximum voltage Volu...

Страница 27: ...the index of the Instructions for Use 3 1 Method memory Methods can be stored in the internal method memory or on the memory card These method memories are organized as follows Memory Card Directory 7...

Страница 28: ...thod name Store method from the working memory to the current directory on the card up to 8 characters delete method method name Delete method from the current directory on the card up to 8 characters...

Страница 29: ...t silo lines silo line method id 1 or C21 id 2 or C22 id 3 or C23 smpl size smpl unit Input for the silo memory Silo line number Method name Sample identification Can be used as specific calculation v...

Страница 30: ...n sequences Connection of a remote box Type of the PC keyboard connected to the remote box Target for datas eneterd by a barcode reader Epson Seiko Citizen HP IBM 1 2 1 2 Sartorius Mettler Mettler AT...

Страница 31: ...rate DX Parameters for the internal dosing unit and for 685 Dosimat Volume Number of cycles Dosing rate Filling rate 0 3 5 99 999 99 mL 1 2 9 0 01 150 mL min max 0 01 150 mL min max output len dos tub...

Страница 32: ...Printing 9 Methods Backup 8 Development 3 Recalling 8 Storing 7 Modes 12ff Selection 3 Survey 12 Operands 4 24 Parameters 14ff pH Stat 17 Printing 5 Recall methods 8 Report 5 Definitions 23 Result Cal...

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