HomeScienceSRM 915c calcium carbonate mass fraction standard

SRM 915c calcium carbonate mass fraction standard


master mentalism tricks

Credit: National Institute of Standards and Technology

This standard reference material from the National Institute of Standards and Technology (NIST) will help calibrate procedures for calcium determinations used in clinical analysis and for routine critical evaluation of the daily working standards applied in these procedures. Additionally, the certified values can be used to validate analytical methods for determining calcium and carbonate.

NIST has released a mass fraction reference material for calibrating the instruments used by a wide variety of manufacturers. Mass fraction of a substance is the ratio of mass of the substance to the total mass.

Calcium carbonate is a chemical compound with the formula CaCO3. The coulometric assay value was obtained by automated back-titration using coulometrically-standardized hydrochloric acid (HCl) as the excess added substance, with potentiometric detection of the strong acid endpoint after removal of evolved carbon dioxide (CO2) and correcting for trace impurities. The gravimetric assay value was obtained by conversion to CaSO4 and correcting for trace impurities in the CaSO4.

A unit of SRM 915c consists of a single glass bottle containing approximately 20 g of material. The original unopened bottles of SRM 915c should be stored at room temperature (25 oC ± 10 oC). An open bottle must be protected from moisture and acid vapors and can be reused until the material reaches its expiration date, provided that the open bottle is tightly re-capped and stored at room temperature.

More information: Thomas W Vetter, Certification of Standard Reference Material® 915c Calcium Carbonate, (2022). DOI: 10.6028/NIST.SP.260-223

Provided by National Institute of Standards and Technology

This story is republished courtesy of NIST. Read the original story here.

Citation: SRM 915c calcium carbonate mass fraction standard (2023, January 17) retrieved 22 January 2023 from https://phys.org/news/2023-01-srm-915c-calcium-carbonate-mass.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Read The Full Article Here


trick photography
Advertisingfutmillion

Popular posts

Hollywood Spotlight: Director Jon Frenkel Garcia
The Dutchman Cast: André Holland, Zazie Beetz & More Join
The Creator Reactions: Gareth Edwards’ Latest Is One of 2023’s
Company Paid Critics For Rotten Tomatoes Reviews
‘Interview With the Vampire’: Meet the Real Armand With Assad
The Rookie Season 6 Episode 4 Review: Training Day
‘Better Off Ted’ Turns 15: Where’s the Cast Now?
‘Fraggle Rock: Back to the Rock’ Season 2 Heading to
Bill McBirnie’s Reflections (For Paul Horn) 
“Be Big” by Stephanie Bettman
“Ride On” by Roots Asylum
Touch the Buffalo’s “Bodhicitta”
9 Boob Tapes That Work For All Busts, Shapes, and
Here’s Why Apple Cider Vinegar Is the Ingredient Your Hair
I Travel a Lot for Work—These Are the Useful Items
The Best Street Style Looks From the Fall 2023 Couture
Interview with B.R. Louis, Author of Space Holes: First Transmission
Books & Looks Podcast: Inside the Blaze: The Untold Story
No Preview
The Heaven & Earth Grocery Store: Recap & Summary
Latest in Mystery Series Follows P
Machine learning method speeds up discovery of green energy materials
New archive of ancient human brains challenges misconceptions of soft
Advances and applications of nanoparticles in cancer therapy
Mars’s gravitational pull may be strong enough to stir Earth’s
Killing TikTok
Comedy or Tragedy?
BYD Atto 3 Electric SUV With Blade Battery Technology Launched
Bitcoin Falls to $19,000 in Anticipation of Tighter Fed Policy