WEF Discussions — Now on LinkedIn!
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WEF Discussion Forums
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Laboratory Management and Technical Issues
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TSS standard
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Joined: 4/1/2010
Posts: 2
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In the past, I purchased custom prepared TSS/TDS standards. Presently we are working to use in-house prepared standard and our project looks promising with a high standard of ~ 40mg/l.
I wonder if anyone of the readers use a standard at lower concentrations...
Manlab
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Joined: 9/1/2011
Posts: 3
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In my lab, we used to make up our own standard using infusorial earth. We made our standard in the range of 60-100 mg/L. Currently, we are using a purchased standard at 28.6 mg/L.
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Joined: 9/21/2009
Posts: 98
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We use a turbidity standard which is good to check precision. We have generated a known value by averaging many samples and different concentrations. We purchase a stock standard of 4000 NTU and make dilutions from that. A 80 NTU dilution yeilds a 44 mg/L TSS.
The VSS is 100 % of the TSS value and if the oven temperature is too high the results will be low. If the sample is not dry the result is high. Results of this secondary standard can be compared to other purchased TSS standard for correlation. The cost is very low.
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