Fully automated TAN/TBN

analysis according to

ASTM D 664 and D 2896

• Cost-efficient: Fully automated process reduces time and personnel requirements

• Reliable: Reproducible results thanks to robust automation

• Convenient: Easy control and professional data handling with tiamo TM, the titration software



Acid and base number determinations – easy with Metrohm

02

The base number quantifies the alkaline components in These components are compounds (acids and salts) with petroleum products, which are determined as a sum pKs values < 9, and the acid number indicates how many parameter. These include primary organic and inorganic mg of KOH are required to neutralize 1 g of sample. The amino compounds in particular. However, salts of weak acid number indicates changes in the product during use.

acids, basic salts of polycarboxylic acids, some heavy Both parameters are determined by potentiometric metal salts, and detergents are also detected. The base titration in nonaqueous solvents or solvent mixtures.

number indicates how many basic components are con-tained in 1 g of sample, and is expressed as mg KOH. This Metrohm offers a complete system that enables easy, determination is used to detect changes in the product rapid, and reproducible determinations of these two during use.

important parameters – fully automated, from the addi-tion of the solvent to the cleaning of the electrode.

The acid number quantifies the acidic components in petroleum products, which are measured as a sum parameter.



«Our automated Metrohm system enables us to determine TAN and TBN values rapidly, safely, and conveniently in around 100 lubricating oil samples per day.»

Lin Li, Manger at WesTrac Caterpillar in Tianjin, China



The challenges of electrode handling For measurements in non-aqueous media – as is the case 03

with TAN and TBN determinations – the electrode mem-brane requires careful, multi-step handling between sample measurements. Only the automation of this pro-cedure can guarantee that every cleaning or conditioning step is carried out in exactly the same manner. This requirement for electrode handling is related to the need to reduce the exposure of users to aggressive solvents as much as possible.

Reproducible measurements, maximum user safety The complete system developed by Metrohm ensures both: The fully automated reagent and electrode handling ensures reproducible measurements while at the same time accommodating the need for user safety. The user need only place the sample on the sample processor turntable and start the system. Likewise, any blank determinations of the solvent used and titer determinations of the titrant are carried out completely automatically. Users can then concentrate on the essentials – evaluation of the results.

Thanks to the concise database in tiamo TM, users always Titration curve of the TBN analysis of a used motor oil have the big picture in view. Control charts, filter and export functions, together with the freely definable Used motor oil

TBN [mg KOH/g]

layout of the database interface, enable convenient and 1

6.145

flexible data management.

2

6.315

3

6.170

4

6.102

5

6.178

6

6.309

Average

6.203

s(abs)

0.088

s(rel)

1.42 %

Results of the TBN analysis of a used motor oil



Ordering information

MATi 02: Automated TAN/TBN analysis G, CH-9100 Herisau

ohm A

www.metrohm.com

, gedruckt in der Schweiz bei Metr SW

12

Änderungen vorbehalten

Gestaltung Ecknauer+Schoch A 8.000.5157EN – 2016-