The know-how packagefor the titrimetric/potentiometric analysis

of foodstuffs

Food Potentiometric Analysis Collection

Food PAC

6.6055.003

2 Potentiometrische Titration Potentiometric titration 3

Food PAC – your key to foodstuff analysis

Method symbols facilitate orientation.

Food PAC (Food Potentiometric Analysis Collection) presents the titrimetric determination methods most of-ten used in foodstuff analysis. No fewer than 96 meth-ods are described in detail – the descriptions deal with the sample weight, the titrant to be used, the titration procedure and the calculation of the results.

The Food PAC know-how package comprises an application binder with detailed method descriptions, a method memory card, the Metrodoc CD ROM with the Food PAC analysis methods as well as the Metrodata CD ROM.

The procedure could not be simpler. Depending on the type of Metrohm titrator, you have three different pos-sibilities:

• 798 MPT Titrino, 799 GPT Titrino, 785 DMP Titrino and 751 GPD Titrino (with instrument program version 5.751.0020 or higher)

Using the method memory card, you load the Food PAC methods (complete parameter sets including calculations) into your Titrino. You then equip the Titrino with the corresponding accessories (elec-trodes, Exchange Unit), load the desired method into the working memory, prepare the first sample and start the determination by pressing a key. After the sample volume has been entered and the analysis is concluded, the Titrino outputs a complete result report – possibly with titration curve – on the con-nected printer.

• 794 Basic Titrino, 716 DMS Titrino, 736 GP Titrino and 751 GPD Titrino (with instrument program version ear-lier than 5.751.0020)

Using the demo version of Metrodata VESUV 3.0, which forms part of the delivery package, you load the methods into your Titrino with a PC. Then pro-ceed as described above.

• 808, 809, 835 and 836 Titrando

You can easily take over the Titrino parameters into your Titrando by means of the conversion program (method converter) contained in the PC Control soft-ware.

2 Potentiometrische Titration Potentiometric titration 3

Two titration examples for your Metrohm titrator

Titration curve for the determination of the NaCl content in instant soup.

Electrode 6.0430.100 Ag Titrode coated with Ag2S

Titrant c(AgNO3) = 0.1 mol/L

Titration curve for the determination of calcium in milk.

Electrodes 6.0502.140 Cu ISE and 6.0726.107 Ag/AgCl reference electrode

Titrant c(EGTA) = 0.1 mol/L

List of methodsThe 96 determination methods to be found on the memory card are arranged in groups A to Q and deal with the following analyses:

A pH valueCalibration and handling of electrodes, measuring pH

B Preparation and titer determination of the most important titrants

NaOH, KOH, HCl, H2SO4, iodine, thiosulfate, per-manganate, AgNO3, EDTA

C Drinking water and mineral waters

pH value, acid capacity, water hardness, Ca, Mg, chloride, sulfate, sulfide, chlorine, CO2, O2, oxidiz-ability

D Milk and dairy products

pH value, acidity, chloride, Ca, vitamin C, Kjeldahl N

E Edible fats and oils

Acid number, free fatty acids, hydroxyl value, iodine value, peroxide value, saponification value

F Cereals, dry pasta

pH value, acidity, NaCl, Kjeldahl N/total protein, Ca, Mg

G Honey, sugar and sweets

pH value, free acid, formol number, reducing sug-ars

H Soft drinks, lemonades

Citric acid/citrate, phosphoric acid, K, total P

J Fruit and vegetable juices, jams

pH value, total acid, vitamin C, SO2, chloride, total P, sulfate, Ca, Mg, K, ash alkalinity, Kjeldahl N, for-mol number, reducing sugars

K Beer, vinegar, liquor and wine

pH value, total acid, CO2, SO2, vitamin C, ash alka-linity, chloride, sulfate, total esters

L Coffee, cocoa and chocolate

pH value, acidity, chloride, reducing sugars, Kjel-dahl N, free fatty acids, iodine value, saponification value

M Sweeteners, gelling and thickening agents

Methoxy- and ethoxy groups, cyclamate, saccharin

N Fruit, vegetable and mushroom preserves

Oxalic acid, NaCl, SO2

O Table salt, spices, pickling salt, seasoning salt, herbal salt and flavored salt

NaCl, total iodine, fluoride, tricalciumphosphate, ni-trite

P Meat products, meat extracts, consommé cubes, jellied meat, seasonings, soups, sauces

NaCl, Kjeldahl N/raw protein, SO2

Q Qualification of the titrator, validation of a titra-tion method

4 Potentiometrische Titration

Ordering information

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Scope of delivery6.6055.003 Food PAC, English version

6.6055.001 Food PAC, German version

each one containing:

• The printed collection with texts concerning the 96 methods. Each method is de-scribed in detail and comprises instrument parameters, calculation formulae, curve examples as well as result reports. The collection comes in an attractive applica-tion binder; method-specific images facilitate orientation.

• The method memory card containing the 96 methods for loading into the Titrino.

• Two CD ROMs with:

– The electronic version of the Food PAC ring binder (PDF).

– The following Metrohm Application Bulletins (PDF): nos. 25, 33, 53, 69, 84, 85, 86, 87, 94, 125, 129, 130, 139, 140, 141, 178, 180, 188, 225, 235, 249 and 252.

– VESUV file with the Food PAC methods.

– Demo versions of the Metrodata programs VESUV, TiNet, VA Database, IC Net, etc. 6.6050.000 PC Control software (Titrandos) and Adobe® Acrobat® Reader for reading and printing the PDF files.