Based on statistical analysis of CHN combustion results of 18 international service providers, it is determined that the ±0.4% deviation most commonly required by chemistry journals is not justified.
Funding
The Welch Foundation (Grant AA-1846), the National Science Foundation (Award 1753025), the ARC (FT17010007 and DP200100013), the Natural Sciences and Engineering Research Council of Canada (NSERC-RGPIN-05574), and the Engineering and Physical Sciences Research Council (EP/R026912/1).