Sentence examples for ppm by weight from inspiring English sources

Traditional "regular" grades of diesel fuel contained as much as 5,000 parts per million (ppm) by weight sulfur.

In contrast to ocean water, the average salinity of the world's rivers is low only about 0.012 percent, or 120 ppm by weight.

The degradation of high molecular weight polystyrene under turbulent flow was investigated using a rotating disk apparatus for three different solvent systems at a maximum polymer concentration of 150 ppm by weight.

Star-shaped amphiphilic polymers were prepared via a simplified electrochemically mediated ATRP (seATRP) procedure under both potentiostatic and pseudo-galvanostatic conditions, utilizing only 50 ppm (40 ppm by weight (wt)) of CuII complex, much less than previously reported concentrations of catalyst of ca. 4,000 130,000 ppm (590 19,000 ppm (by wt)).

Magnesium (Mg) samples prepared with 25 ppm, 220 ppm and 13000 ppm (by weight) of iron (Fe) were subject to specific forms of electrochemical testing with the ability to directly probe the extent of dissolved Mg2+ ion concentration and cathodic reduction during dissolution.

Concentrations in this paper are given in ppm by weight, i.e., μg g−1.

Clearance criteria for declaring the decontamination complete as determined by the U.S. EPA project manager included air samples with < 1,000 ng/m PCBs, surface wipe samples with < 10,000 ng/100 cm, and remaining porous building components (brick and concrete block) < 1 ppm PCB by weight (Chang et al. 2002).

This corresponds to approximately 2 ppm oxidation by weight.

Our investigation of 24 buildings in the Greater Boston Massachusettss) area revealed that one-third (8 of 24) contained caulking materials with PCB content > 50 ppm (mg/kg) by weight.

Concentrations among the other eight ranged from 1.59 ppm to 65.5 ppm by dry weight.

Laboratory analysis by the California Animal Health & Food Safety Laboratory found detectable levels of arsenic in eight of the nine kelp herbal supplements, ranging from 1.59 ppm to 65.5 ppm by dry weight (1.59, 2.28, 9.55, 9.97, 10.5, 24.1, 34.8, and 65.5 ppm); the median value was 10.23 ppm.