Lovibond 00386448 - MD1x0/200 - COD HR TT, COD LMR TT, COD LR TT, COD MR TT Manuale utente

Lovibond® Water Testing

Tintometer® Group

Manual of Methods

MD 100 • MD 110 • MD 200

COD

EN

Manual of Methods

Page 4

DE

Methodenhandbuch

Seite 24

ES

Manual de Métodos

Página 46

FR

Méthodes Manuel

Page 68

IT

Manuale dei Metodi

Pagina 90

PT

Métodos Manual

Página 118

NL

Handboek Methoden

Zijde 138

ZH

方法手册

Page 160

NL Handboek van Methoden 01/20EN Handbook of Methods 01/20

KS4.3 T

0.1 - 4 mmol/l KS4.3

Acid / Indicator

20

S:4.3

Instrument specific information

The test can be performed on the following devices. In addition, the required cuvette

and the absorption range of the photometer are indicated.

Instrument Type Cuvette λMeasuring Range

MD 200, MD 600, MD 610,

MD 640, MultiDirect, PM 620,

PM 630

ø 24 mm 610 nm 0.1 - 4 mmol/l KS4.3

SpectroDirect, XD 7000,

XD 7500

ø 24 mm 615 nm 0.1 - 4 mmol/l KS4.3

Material

Required material (partly optional):

Reagents Packaging Unit Part Number

Alka-M-Photometer Tablet / 100 513210BT

Alka-M-Photometer Tablet / 250 513211BT

Application List

• Waste Water Treatment

• Drinking Water Treatment

• Raw Water Treatment

Notes

1. The terms Alkalinity-m, m-Value, total alkalinity and Acid demand to KS4.3 are iden-

tical.

2. For accurate results, exactly 10 ml of water sample must be used for the test.

Display in the MD

100 / MD 110 /

MD 200

Bar code for the

detection of the

methods

Method name

Measuring range

Chemical Method

Method number

Language codes

ISO 639-1 Revision status

KS4.3 T / 20

How to use

ENMethod Reference Book4

EN

Implementation of the provision Acid capacity KS4.3 with Tablet

Select the method on the device

For this method, no ZERO measurements are to be carried out with the following de-

vices: XD 7000, XD 7500

10 ml

Fill 24 mm vial with 10 ml

sample.

Close vial(s).

Sample

Place sample vial in the

sample chamber. • Pay

attention to the positioning.

Dissolve tablet(s) by inver-

ting.

Sample

Place sample vial in the

sample chamber. • Pay

attention to the positioning.

Test

Press the TEST (XD:

START) button.

The result in Acid Capacity KS4.3 appears on the display.

Performing test

procedure

KS4.3 T / 20

NL Handboek van Methoden 01/20EN Handbook of Methods 01/20

How to use

ENMethod Reference Book 5

EN

COD LR TT / M130

ENMethod Reference Book1.06

EN

COD LR TT M130

3 - 150 mg/L CODb) Lr

Dichromate / H2SO4

Material

Required material (partly optional):

Reagents Packaging Unit Part Number

COD LR/25 25 Pieces 2420720

COD LR/25, mercury free 25 Pieces 2420710

COD LR/150 150 Pieces 2420725

The following accessories are required.

Accessories Packaging Unit Part Number

Thermoreactor RD 125 1 Pieces 2418940

Remarks

1. The blank is stable when stored in the dark.

2. Blanks and test vials must be from the same batch.

3. Do not place hot vials in the sample chamber. The most stable measured values

can be determined if the vials are left standing overnight.

COD LR TT / M130

ENMethod Reference Book1.0 7

EN

Removal of high Chloride concentration in COD samples

Chloride content may interfere during COD determination, if the tolerance level of

the used test will be exceeded. To overcome that problem the following sample

pretreatment can be used:

Equipment:

• 2 Erlenmeyer flasks 300 mL with NS 29/32 connection

• 2 HCl absorber according to DIN 38409

• 2 glass stoppers NS 29/32

• Pipettes for volumes of 20 and 25ml

• Magnetic stirrer and magnetic stirring rods

• Thermometer to measure 0 - 100 °C

• Ice bath

Reagents:

• 12 to 14 g of sodalime

• 50 mL H2SO4 (95 - 97%, 1.84 g/ml, CSB free)

• Hydrochloric acid 10 % to clean absorber from residual lime

The work must be carried out under a fume hood!

20 mL

25 ºC

15 ºC

20 mL

Put 20 mL homogenised

sample in the erlenmeyer

flask.

Add the magnetic stirring

rod, and cool in the ice

bath.

Put 20 mL deionized water

in the second erlenmeyer

flask.

25 mL

50 ºC

40 ºC

Add slowly 25 mL

concentrated Sulfuric

acid each under cooling

and stirring.

Sample will be hot! Temperature should not

exceed 40 to 50 °C.

COD LR TT / M130

ENMethod Reference Book1.08

EN

25 ºC

15 ºC

After the complete addition

of the sulfuric acid, cool to

room temperature in the ice

bath.

Add 6 - 7 g soda lime

powder into the absorption

tubes.

Close the absorption tubes

with a plug and fit onto the

Erlenmeyer flasks.

9

4

5

6

7

8

10

11 12

1

2

3

120 min

Stir at about 250 rpm for

120 minutes at room

temperature (a turbidity

may be formed).

This sample is used for the analysis of COD. Due to this pretreatment procedure the

original sample has been diluted by a factor of 2.05.

CSB sample= CSB display x 2.05

Determination of COD LR with Vario Vial Test

Select the method on the device.

Blank

2 mL

Sample

2 mL

Prepare two reaction vials.

Mark one as a blank.

Put 2 mL deionised water

in the blank.

Put 2 mL sample in the

sample vial.

COD LR TT / M130

ENMethod Reference Book1.0 9

EN

Close vial(s). Carefully invert several

times to mix the contents.

Note: Will get hot!

Seal the vials in the pre-

heated thermoreactor for

120 minutes at 150 °C .

60 °C

Remove the vial from the

thermoreactor. (Note: vial

will be hot!)

Allow vial(s) to cool to 60

°C.

Invert several times to mix

the contents.

25 ºC

15 ºC

Zero

Allow the vial to cool to

room temperature and then

measure.

Place blank in the sample

chamber. • Pay attention to

the positioning.

Press the ZERO button.

COD LR TT / M130

ENMethod Reference Book1.010

EN

Test

Remove vial from the

sample chamber.

Place sample vial in the

sample chamber. • Pay

attention to the positioning.

Press the TEST (XD:

START)button.

The result in mg/L COD appears on the display.

COD LR TT / M130

ENMethod Reference Book1.0 11

EN

Chemical Method

Dichromate / H2SO4

Appendix

Interferences

Persistant Interferences

• In exceptional cases, contents, for which the oxidation capacity of the reagent is not

sufficient, can lead to lower results.

Removeable Interferences

• Suspended solids in the vial can lead to incorrect measurements and so to avoid

this, it is important to place the vials carefully in the sample chamber as the method

necessitates a build-up of precipitate at the bottom of the vial.

• The outer walls of the vial must be clean and dry before the analysis is carried out.

Fingerprints or water droplets on the vial lead to incorrect measurements.

• In the standard version, chloride interferes from a concentration of 1000 mg/L. In the

mercury-free version, the disturbance depends on the chloride concentration and the

COD. Concentrations from 100 mg/L chloride can lead to significant disturbances

here.



Method Validation

Limit of Detection 3.2 mg/L

Limit of Quantification 9.7 mg/L

End of Measuring Range 150 mg/L

Sensitivity -272 mg/L / Abs

Confidence Intervall 3.74 mg/L

Standard Deviation 1.55 mg/L

Variation Coefficient 2.02 %

Conformity

ISO 15705:2002

According to

ISO 15705:2002

DIN 38409 part 41

b) Reactor is necessary for COD (150 °C), TOC (120 °C) and total -chromium, - phosphate, -nitrogen, (100 °C)

COD MR TT / M131

ENMethod Reference Book1.012

EN

COD MR TT M131

20 - 1500 mg/L CODb) Mr

Dichromate / H2SO4

Material

Required material (partly optional):

Reagents Packaging Unit Part Number

COD MR/25 25 Pieces 2420721

COD MR/25, mercury free 25 Pieces 2420711

COD MR/150 150 Pieces 2420726

COD MR/150, mercury free 150 Pieces 2420716

The following accessories are required.

Accessories Packaging Unit Part Number

Thermoreactor RD 125 1 Pieces 2418940

Remarks

1. The blank is stable when stored in the dark. Blanks and test vials must be from the

same batch.

2. Do not place hot vials in the sample chamber. The most stable measured values

can be determined if the vials are left standing overnight.

3. For samples under 100 mg/L COD it is recommended to to use the tube test COD

LR if a higher degree of accuracy is required.

COD MR TT / M131

ENMethod Reference Book1.0 13

EN

Determination of COD MR with Vario Vial Test

Select the method on the device.

Blank

2 mL

Sample

2 mL

Prepare two reaction

vials. Mark one as a blank.

Put 2 mL deionised water

in the blank.

Put 2 mL sample in the

sample vial.

Close vial(s). Carefully invert several

times to mix the contents.

Note: Will get hot!

Seal the vials in the pre-

heated thermoreactor for

120 minutes at 150 °C .

60 °C

Remove the vial from the

thermoreactor. (Note: vial

will be hot!)

Allow vial(s) to cool to

60 °C.

Invert several times to mix

the contents.

COD MR TT / M131

ENMethod Reference Book1.014

EN

25 ºC

15 ºC

Zero

Allow the vial to cool to

room temperature and then

measure.

Place blank in the sample

chamber. • Pay attention to

the positioning.

Press the ZERO button.

Test

Remove vial from the

sample chamber.

Place sample vial in the

sample chamber. • Pay

attention to the positioning.

Press the TEST (XD:

START)button.

The result in mg/L COD appears on the display.

COD MR TT / M131

ENMethod Reference Book1.0 15