Re: Chinese water filter analysis
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OK. I will look in to that,
First, the .mca called "nov" is that with the exciter in place but no water filter target?
Geo
From: "taray singh via groups.io" <sukhjez@...> To: [email protected]Sent: Saturday, November 7, 2020 4:51:28 AM Subject: Re: [XRF] Chinese water filter analysis
Geo I am not sure of the shifting downward trend. But most of my low Z samples esp containing organics such C,H ,O or N tend to have scattering peaks at 13 ,16 ,20 and 50. Their broad nature suggest they are Compton scattering . Taray On Saturday, November 7, 2020, 6:16 PM, GEOelectronics@... wrote: Good work Taray. I was thinking the 3 large peaks were backscatter from the exciter source, but with your calibration they seem to be clearly shifted downward, do you have a theory?
Geo
From: "taray singh via groups.io" <sukhjez@...> To: [email protected]Sent: Saturday, November 7, 2020 12:07:34 AM Subject: Re: [XRF] Chinese water filter analysis
Hi guys
Repeated this test with more sample? concentrate .
Sampling preparation is important for optimal results.
Soaking a filter paper direct works better than scanning through plastic containers.
This is not a clinical trial so issue of bias does not exist but to have an open mind.
The gains are improved this time.Further improvements via fine gain control will be attempted next time.
Slow learning curve...
Results are suggestive of lead in drinking water.
Suggestive? is good enough for affirmative action,
Don't drink stagnated water from taps.Flush before drinking,
Most of these heavy metals come from plumbing system.
Most publications on water lead? content point to near normal levels
Higher levels ones? will face hurdles before publication.
Thanks
Taray
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