Daniel@R2R
Living the Reef Life
- Joined
- Nov 18, 2012
- Messages
- 38,516
- Reaction score
- 67,449
- Location
- Fontana, California
- What state or country do you live in
- California
Good discussion!
Would this be ok for a calcium supplement?
- Thread starter Japtastic
- Start date
- Tagged users None
Randy Holmes-Farley
Reef Chemist
Staff member
Super Moderator
Excellence Award
Expert Contributor
Article Contributor
R2R Research
My Tank Thread
I’m not sure what lead level might be an issue, but I’ll note that USP pharmaceutical grade calcium chloride dihydrate can have up to 5 ppm lead, so I do not know how easy it will be to ensure the levels are lower than this one at 0.8 ppm without searching actual lot analyses.
OP
OP
Japtastic
Active Member
- Joined
- May 21, 2018
- Messages
- 260
- Reaction score
- 192
- Location
- London, UK
- What state or country do you live in
- United Kingdom
What I don’t get is that it says:
Heavy metals as Pb <20
Pb 0.08
Why state the first line when the second line gives the exact analysis of Pb?
Heavy metals as Pb <20
Pb 0.08
Why state the first line when the second line gives the exact analysis of Pb?
Randy Holmes-Farley
Reef Chemist
Staff member
Super Moderator
Excellence Award
Expert Contributor
Article Contributor
R2R Research
My Tank Thread
The first is likely the guaranteed specification for every batch. The second is the actual analysis of the particular batch. That is the usual practice: a spec, and a specific result.
OP
OP
Japtastic
Active Member
- Joined
- May 21, 2018
- Messages
- 260
- Reaction score
- 192
- Location
- London, UK
- What state or country do you live in
- United Kingdom
Thanks, great to learn this stuff!
Now, I know I could well be overthinking it but I like to get the bottom of all the facts.
Because this COA is from 2016, the current batch could be anywhere between 0.08 and 20?
Now this may be cynical but who does these COA’s? Themselves? Is it governed in anyway?
I also notice that the expiry date for this chemical is 2 years after manufacturing so further voids this COA having any value?
Now, I know I could well be overthinking it but I like to get the bottom of all the facts.
Because this COA is from 2016, the current batch could be anywhere between 0.08 and 20?
Now this may be cynical but who does these COA’s? Themselves? Is it governed in anyway?
I also notice that the expiry date for this chemical is 2 years after manufacturing so further voids this COA having any value?
