Summary for mbas analysis with sublation Discussion
MBAS analysis with sublation is the focus keyphrase here: Arvind Mungray reports that, in wastewater testing, the Standard Methods sublation step gives very high anionic surfactant results in both wastewater and known standards, while the method works correctly without sublation. He is especially puzzled by the use of 100 g of NaCl, which seems to increase the measured results, and asks whether there is a problem with the sublation step and how to overcome it. The excerpt does not include any replies or a resolution, so the page mainly documents a troubleshooting question rather than a confirmed fix. The key issue is that the sublation/NaCl conditions may be affecting recovery or causing inflated readings, but no answer is provided in the source shown.
Standard Methods for the Examination of Water and Wastewater
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Q. For analysis of wastewater MBAS is followed with Sublation as described in
<== ‘Standard Methods …’ (20th Edition). Using sublation (used for reducing interferences) I got very high concentration of anionic surfactants in wastewater and in known standards but without sublation it is ok (as checked by known standards). I am little bit confused in using 100 gms of NaCl in sublation because NaCl seems to increase the results. Can any body please give me directions to over come this problem. Is there any problem in sublation .
I will be thankful to you .
Arvind Mungray
Research Scholar – Roorkee, Uttranchal, India
2004