1. Tintometer GmbH Lovibond® Product Training: Water Analysis
Instrumentation - Reagents - Applications
presented by Dipl. Ing. Helmut Reber

3. History
1885 Joseph William Lovibond being in the brewery business started the foundation of the Tintometer Ltd. in Salisbury/England. He introduced the Lovibond® colour scale and the first colorimeter ever.
1953 Publication of the first edition of the book "Colorimetric Chemical Analytical Methods (CCAM)". Colorimetric Analytical Equipment was introduced using reagent tablets as an alternative to the liquid chemistry.
1967 Foundation of the Tintometer GmbH Company in Dortmund/Germany by Cay-Peter Voss. Technical backup and service together with closer contact leading to prompt supply of instrumentation to customers in Continental Europe.
1982 Introduction of the first photometer systems for water analysis.
1985 Centenary of The Tintometer Ltd. in Salisbury England with congratulations by the Prime Minister Margaret Thatcher.
1997 Certification according to DIN ISO 9001 by DQS. 30 years of successful activities of the Tintometer GmbH in Dortmund/Germany.
Today Research, development and equipment production of water analytical systems and reagents for various applications. Global marketing of Lovibond® products.

4. Methods and Products titrimetric methods colorimetric methods
tablet count
method
MINIKIT
titrimetric
methods
speed
test
MINIKIT
Comparator
CHECKIT®
Test Kit
visual
methods
colorimetric
methods
CheckitDirect
MaxiDirect
MultiDirect
SpectroDirect
photometric
methods

5. Principle of Photometric Measurement
PCcompact:
orange: 605 nm
green 430 nm

6. Electromagnetic spectrumh

7. Absorption of light Red Red Green STOP Blue Blue Red / Blue light
White
light h h
700 nm
700 nm
550 nm
Green
STOP
550 nm
450 nm
450 nm
Blue
Blue

8. Absorption of light I 0 I E = lg Transmission [%] ∞
Transmission [%]
Extinction [Abs]
T[%]
E[Abs]
I0: Intensitiy of the
entering light
I: Intensitiy of the
transmitted light

9. Principle of Photometric Measurement
PCcompact:
orange: 605 nm
green 430 nm

10. Schematic diagram of a wastewater treatment plant
(activated sludge plant)
Oxygen supply
Waste feed
Effluent
Clarifier
Aeration tank
Sludge Return
Waste sludge

11. Important Wastewater Parameter
treatment
plant
Nitrogen means:
- Ammonia
- Nitrate
- Nitrite

12. Principle of MaxiDirect
Detector
Detector
Interference filter
Interference filter
Measuring beam
LED
LED
LED

13. Principle of PoolDirect and MultiDirect

14. Principle of SpectroDirect
Tungsten halogen lamp
Microprocessor unit
Movable
mirror
Silicon photodiode
For checking the optical system the SpectroDirect has an integrated Didymium-filter, which is placed automatically in front of the detector during self test.
Monochromator
Sample
chamber

15. COD-BOD
COD
BOD        

16. COD-BOD Relationship Characteristics COD/ BOD5 Relation
< 1,7 Easy degradable / nearly complete
decomposition
1,7 – 10 Incomplete decomposition / reasons:
Some of the material is not degradable
Inhibition because of toxic ingredients
Slow adaptation of microorganisms
> 10 No decomposition / reasons:
Persistent ingredients
Complete inhibition because of toxic substances
COD/ BOD5
Relation
≈ 20 % non degradable organic material
≈ 80 % degradable organic material

17. BOD - Biochemical Oxygen Demand
∆ p = BOD
Pressure Sensor
Gasket &
CO2Absorber
Glass Bottle
Gas Phase
Waste Water
Measurement corresponds to the process during
waste water treatment:
Bacteria
Corg + O2
CO Cell mass
Organic Oxygen
Materials
Carbon
dioxide

18. BOD5
BODn+1 > BODn (20,6 % p.d.)
BOD5  70% degradation of total BOD

19. BOD-Graph A: Idealised BOD-Graph B: Nitrification occures (use
nitrification inhibitor N-ATH)
C: Measurement is overrange (change measuring range or dillute sample)
D: Measurment system is
leaky or anaerobiosis occurs
E: Microorganisms were not
pre-adapted; choose a
suitable inokulum

20. pH-Sensor Buffer solution pH 7 Metal lead for pH voltage
Metal lead for pH voltage (Reference Ag/AgCl element)
Reference Elektrolyte
Reference diaphragm
pH glas diaphragm

21. pH-Value
SL_1
SL_2
Potentialin mV
pH-value
U_AS

22. Conductivity- Sensor

23. Oxygen-Sensor PCcompact: orange: 605 nm green 430 nm Refill opening
O-Ring seal
PCcompact:
orange: 605 nm
green 430 nm
Sensor
shaft
Membrame cap

24. Principle of Turbidity Measurement
PCcompact:
orange: 605 nm
green 430 nm