1631 Low Level Hg
For Low Level Mercury Analysis by EPA Method 1631 using Atomic Fluorescence.
Consumables and reagents for ultra-low mercury testing are screened by atomic fluorescence to ensure low mercury backgrounds enabling the analyst to achieve the required 0.2ppt detection limit.
Nitric acid is not used in Method 1631. This just happens to be listed here because it fits in with the high purity HCl that is required by the method.
Is entire tube of BrCl preservation solution added to the 500 mL sample bottle? Add to water or empty bottle?
The entire contents of one tube are emptied into a sample collected for low level mercury via EPA 1631. The sample should be in the bottle prior to the preservative being added.
Yes the cap is Teflon lined.
According to method, bromide solution made with reagent water, not HCL. Is it mistake to make dilution with 90ml of concentrated HCl? My solution become bright orange, not yellow.
Method 1631 section 7.6 reads “In a fume hood, dissolve 27 g of reagent grade KBr in 2.5 L of low-Hg HCl. Place a clean magnetic stir bar in the bottle and stir for approximately 1 h in the fume hood. Slowly add 38 g reagent grade KBrO3 to the acid while stirring. When all of the KBrO3 has been added, the solution color should change from yellow to red to orange.” \r\n\r\nMethod 245.7 says to use water when making the reagent (7.6.4) “In a fume hood, dissolve 2.78 g KBrO3 (Section 7.5.4) and11.90 g KBr (Section 7.5.5) in 500 mL reagent water.”\r\n\r\nThe final solution when using the tubes that we provide will be orange simply due to the concentration of the bromate/bromide in solution. When the proper amount is added to the samples for digestion and preservation the yellow tint will become apparent. What you are doing and the color of the solution is correct for method 1631.\r\n
The HP9012 is a sampling kit--only bottes and other items to take samples. Refer to Method 1631 for specific preservative instructions.
Our certified bottles for EPA method 1631 are 500mL amber borosilicate glass
There are 24 x 500mL bottles filled with Hg-free water. This will ship in two separate boxes of 12 bottles each. These are made-to-order and can generally ship within a day or two.
24 bottles come in a case. This product is currently in stock.
Will this produce the same concentration as what is in the 1631E method? The pictures on the web look like it is clear, will it be yellow when added to HCL?
When diluted in 90 mls of Hg-free HCl the solution will have a yellow tint to it and have a final concentration of Br/BrO3 per mL of acid equivalent to what is required in method 1631.
This can be found under the \"Miscellaneous MSDS\" section of the MSDS link.
This MSDS sheet can be found under the \"Miscellaneous MSDS\" section of the MSDS link.