Skip to content Skip to footer
0 items - P0.00 0

BOS ISO 9174:1998


Water quality — Determination of chromium — Atomic absorption spectrometric methods

SKU: BOS ISO 9174:1998 Category: Product ID: 30470

Additional information

ICS Code

ICS Name



Published Date

Replaced by



Standard Development Stage

Standard Status

Technical Committee

Type of Standards


This International Standard specifies two methods for the determination of chromium in water by atomic absorption spectrometry. The two methods are covered in separate clauses as follows: ¾ Clause 3: Determination of chromium by flame atomic absorption spectrometry; ¾ Clause 4: Determination of chromium by electrothermal atomization atomic absorption spectrometry. Clause 3 is applicable to the analysis of water and waste water when the concentration range is between 0,5 mg/l and 20 mg/l of chromium. When the concentration is below 0,5 mg/l, the determination can be carried out after carefully evaporating an acidified sample to small volume, taking care to avoid the formation of a precipitate.
NOTE The use of evaporation will increase the effect of interfering substances and therefore for concentrations below 0,1 mg/l
the method in clause 4 is given.
Clause 4 is applicable to the analysis of water and waste water when the concentration range is between 5 mg/l and
100 mg/l of chromium by injecting a sample volume of 20 ml. It is applicable to the determination of higher
concentrations by using a smaller sample volume.

The Botswana Bureau of Standards (BOBS) understands the importance of impartiality and confidentiality in carrying out its management system certification activities. BOBS management is committed to gaining and maintaining the reputation, credibility and ultimately, confidence of its stakeholders in rendering its certification services. Additionally, BOBS strives to continuously manage foreseen potential conflicts of duty and interest and ensures objectivity of its activities under the management system certification. To achieve the above, BOBS shall identify, analyse, record and manage potential conflict of duty and interest to ensure that certification services are not provided within relationships that have been identified to pose an unacceptable threat to impartiality. An Impartiality Committee shall periodically review activities of the certification function to verify commitment to credibility and fairness. The Committee shall further assist in the development of policies relating to impartiality of providing certification activities. BOBS is committed to maintaining in strict confidence all information accessed while rendering the certification services and shall ensure that such information is not divulged to third parties without the Client’s written consent unless if required by law.
Demand Quality

When things don't work as they should, it often means that standards are absent.

BOBS Head Office
Physical Address —
Plot No, 55745, Block 8, Mail Airport Road
Postal Address —
Private Bag B048,
Gaborone, Botswana
Francistown office
Physical Address —
Plot No, 32367, Donga,
Adjacent Metsef Wholesalers
Postal Address —
Private Bag F465,
Francistown, Botswana
BOBS Weighbridge
Physical Address —
Plot No: 20683, Ramakukane
Road, Block 3 Industrial,
Gaborone, Botswana
BOBS © Copyright 1992 – 2024. All Rights Reserved. Developed by Weblogic.
Go to Top