Quantitative characterization of agglomerates and aggregates of pyrogenic and precipitated amorphous silica nanomaterials by transmission electron microscopy

Table 3 Descriptive statistics of silica NM-202

Column	n	Mean	SD	SEM	Max	Min	Median	25%	75%
Area (nm²)	4248	4039	9319	142	177792	35	1127	422	3335
Convex Area (nm²)	4248	7375	20734	318	445959	37	1536	531	5086
Rectangle Max (nm²)	4248	12683	36710	563	817213	58	2549	874	8562
Rectangle Mean (nm²)	4248	11409	32793	503	737974	53	2305	798	7764
Rectangle Min (nm²)	4248	9785	28110	431	671026	46	2014	697	6673
ECD (nm)	4248	53,2	48,0	0,7	475,7	6,7	37,8	23,1	65,1
Feret Max (nm)	4248	90,0	96,0	1,0	1006,0	7,0	58,0	33,0	107,0
Feret Mean (nm)	4248	74,0	78,0	1,0	865,0	7,0	48,0	28,0	88,0
Feret Min (nm)	4248	55,1	56,7	0,8	675,9	4,1	37,2	21,5	65,8
New Radius of Inner Circle (nm)	4248	11,24	5,97	0,09	51,74	2,09	9,87	6,87	14,05
Central Distance Max (nm)	4248	48,4	52,9	0,8	590,2	3,7	31,0	17,5	57,6
Central Distance Mean (nm)	4248	28,3	27,5	0,4	289,7	3,1	19,3	11,7	34,2
Central Distance Min (nm)	4248	6,94	6,64	0,10	84,15	0,03	5,23	2,86	8,59
Diameter Max (nm)	4248	89,0	96,0	1,0	1006,0	7,0	58,0	33,0	107,0
Diameter Mean (nm)	4248	79,0	85,0	1,0	914,0	7,0	51,0	29,0	94,0
Diameter Min (nm)	4248	57,3	59,8	0,9	714,8	4,2	38,5	22,1	68,3
Convex Perimeter (nm)	4248	245	259	3	2849	21	158	91	291
Perimeter (nm)	4248	468	865	13	17955	21	197	99	453
Aspect Ratio	4248	1,596	0,367	0,005	3,811	1,032	1,518	1,327	1,793
Convexity	4248	0,726	0,128	0,001	0,991	0,302	0,730	0,635	0,823
Elongation	4248	1,805	0,548	0,008	5,474	1,000	1,679	1,403	2,081
Shape Factor	4248	0,386	0,231	0,003	0,966	0,006	0,354	0,192	0,557
Sphericity	4248	0,383	0,193	0,002	0,988	0,033	0,355	0,231	0,508

ISSN: 1477-3155