Chemical Oxygen Demand
Chemical oxygen demand (COD) is a vital test for
assessing the quality of effluents and waste waters
prior to discharge. The COD test predicts the oxygen
requirement of the effluent and is used for the
monitoring and control of discharges, and for assessing
treatment plant performance.
The standard test for COD involves digesting the sample with
strong sulphuric acid solution in the presence of chromium and
silver salts. These potentially hazardous chemicals clearly need
to be handled with extreme care.
The Palintest COD Tubetests system offers a method which
is both practical and convenient. The reagents are supplied
premixed keeping potentially hazardous chemicals to a
minimum. The test is simply carried out by adding the sample
to the tube, closing the cap and then digesting for two hours
at 150°C. The tubes are then cooled and the test colour
measured using a Palintest photometer.
Palintest Tubetests are integrated with the Palintest
photometer system so as to provide a complete system for
COD measurement. Palintest COD Tubetests are offered in
five ranges: 150 mg/l, 400 mg/l, 1000 mg/l, 2000 mg/l and
20,000 mg/l.
The reagent formulations are based on those specified in
recognised international standard methods and meet the
requirements of conformity testing against national and
international standards.
Four types are available, allowing the user to choose the
most environmentally-friendly product for their application:
• The mercury-free formulation is recommended for general
use
• The formulation with mercuric sulphate (M) is provided for
use in standard procedures which require the suppression
of interference due to moderate levels of Chloride
• The high Chloride formulation (2M) provides much higher
levels of chloride suppression and is suitable for working
with samples with very high Chloride levels
Ordering Information
CODE
DESCRIPTION (25 tests per carton)
RANGE (ppm)
PL 450
COD/150 Tubetests/Mercury Free
5 - 150
PL 452
COD/400 Tubetests/Mercury Free
20 - 400
PL 453
COD/1000 Tubetests/Mercury Free
10 - 1,000
PL 454
COD/2,000 Tubetests/Mercury Free
50 - 2,000
PL 456
COD/20,000 Tubetests/Mercury Free
500 - 20,000
PL 460
COD/150/M Tubetests with Mercury
5 - 150
PL 462
COD/400/M Tubetests with Mercury
20 - 400
PL 463
COD/1000/M Tubetests with Mercury
10 - 1,000
PL 464
COD/2,000/M Tubetests with Mercury
50 - 2,000
Palintest Ltd
Palintest House, Kingsway, Team Valley,
Gateshead, Tyne & Wear, NE11 0NS,
England
Tel: +44 (0) 191 491 0808
Fax: +44 (0) 191 482 5372
Email: sales@palintest.com
Website: www.palintest.com
Palintest USA
21 Kenton Lands Road, Erlanger,
Kentucky 41018, USA
Tel: (859) 341 7423
Toll Free: 800 835 9629
Fax: (859) 341 2106
Email: info@palintestusa.com
Website: www.palintestusa.com
COD/20,000/M Tubetests with Mercury
500 - 20,000
COD/150/2M Tubetests with Mercury
5 - 150
PL 468
COD/1000/2M Tubetests with Mercury
10 - 1,000
PL 465
COD/2,000/2M Tubetests with Mercury
50 - 2,000
PL 467
COD/20,000 Tubetests with Mercury
500 - 20,000
PL 481
COD/150 M/C Tubetests with Mercury
5 - 150
PL 484
COD/1,500 M/C Tubetests with Mercury
50 - 1,500
PL 486
• The new M/C formulations with mercuric sulphate are
specifically for use in non-Palintest instruments, and allow
users of compatible instruments to take advantage of the
price, quality, and service we offer, whilst using their
existing instrumentation. The new product comes in
3 ranges: up to 150 mg/l, up to 1500 mg/l and up to
15,000 mg/l.
PL 466
PL 461
COD/15,000 M/C Tubetests with Mercury
500 - 15,000
Palintest Australia/Asia Pacific
1/53 Lorraine Street,
Peakhurst Business Centre,
Peakhurst NSW 2210, Australia
Tel: 1300 131516
Fax: 1300 131986
Email: palintest@palintest.com.au
Website: www.palintest.com.au
Palintest China
Room 1601, Kun Tai International
Mansion, 12B Chao Yang District,
Beijing, 100020, PRC
Tel: +86-10 5126 1868 - 809
Fax: +86-10 58790155
E.mail - fred.fan@palintest.com
Website - www.palintest.cn
The information in this leaflet is believed to be correct but is given without warranty or engagement. Specifications are subject to change without notice. Illustrations are for style only. Individual products may differ from those illustrated.