Dilithium titanate

Particle size distribution (Granulometry)

Link to relevant study record(s)

Reference

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018-03-06 to 2018-04-03

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Remarks:

Only one picture was taken by SEM, histograms and Rs distribution were missing, for the MMAD no GSD was stated

Qualifier:

according to guideline

Guideline:

OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions) - Method B: Fibre Length and Diameter Distributions

Deviations:

yes

Remarks:

Only one picture was taken by SEM, histograms and Rs distribution were missing, for the MMAD no GSD was stated

GLP compliance:

yes (incl. QA statement)

Remarks:

signed, 2016-08-26

Type of method:

microscopic examination

Remarks:

scanning electron microscopy

Type of distribution:

volumetric distribution

Mass median aerodynamic diameter:

4.91 µm

Remarks on result:

other: GSD was not stated

Percentile:

D50

Mean:

3.89 µm

St. dev.:

5.55

Remarks on result:

other: Aspect ratio: 1.27

Percentile:

other: Minimum

Mean:

0.79 µm

Remarks on result:

other: Aspect ratio: 1.00

Percentile:

other: Maximum

Mean:

78.35 µm

Remarks on result:

other: Aspect Ratio: 3.71

No.:

#1

Size:

> 100 µm

Distribution:

71.35 %

Remarks on result:

other: mass fraction, spherical volume [%]

No.:

#2

Size:

>= 10 - <= 100 µm

Distribution:

26.14 %

No.:

#3

Size:

>= 4 - <= 10 µm

Distribution:

2.44 %

No.:

#4

Size:

< 4 µm

Distribution:

0.06 %

Sieve Fraction

- weighted sample: 0.9683 g

- weight fraction <100 μm: 0.2774 g

- mass fraction <100 μm: 28.65 %

Particle Size Distribution

Sieve Fraction nominal < 100 μm

Particle Size Distribution (sieve fraction < 100 μm)

Counts	1548
	Mean diameter [μm]	Aspect Ratio
Minimum	0.79	1.00
Maximum	78.35	3.71
Arithmetic mean	4.58	1.35
Median	3.89	1.27
Standard deviation	5.55	0.38

Mass Fraction (calculated)

Sieve Fraction nominal < 100 μm

Mass Fraction (Sieve Fraction < 100 μm)

Particle Size	Spherical Volume	Cubical Volume
<4 μm	0.23 %	0.23 %
4-10 μm	8.53 %	7.18 %
10-100 μm	91.24 %	92.59 %
>100 μm	0.00 %	0.00 %
Median (diameter μm)	4.91 μm	9.52 μm

Median diameter corresponds to MMAD (Mass Median Aerodynamic Diameter).

Conclusions:

The test item dilithium titanate has following mass fractions (accounting based on the total sample weight):
- Mass Fraction: >100 μm, 71.35 %
- Sieve Fraction: 10-100 µm, 26.14 %
- Sieve Fraction: 4-10 µm, 2.44 %
- Sieve Fraction: <4 µm, 0.06 %
The MMAD (Mass Median Aerodynamic Diameter < 100 μm) has a value of 4.91 μm as spherical particles.

The test item dilithium titanate has following particle size distribution:
- Minimum: 0.79 µm, 1.00*
- Maximum: 78.35 µm, 3.71*
- Arithmetic mean: 4.58 µm, 1.35*
- Median: 3.89 µm, 1.27*
- Standard deviation, 5.55 µm, 0.38*
*Aspect Ratio

Description of key information

The test item dilithium titanate has a D₅₀ of 3.89 µm (1.27 aspect ratio).

Additional information

The test item dilithium titanate has following mass fractions (accounting based on the total sample weight):

- Mass Fraction: >100 μm, 71.35 %

- Sieve Fraction: 10-100 µm 26.14 %

- Sieve Fraction: 4-10 µm 2.44 %

- Sieve Fraction: <4 µm 0.06 %

The test item dilithium titanate has following particle size distribution:

- Minimum: 0.79 µm, 1.00*

- Maximum: 78.35 µm, 3.71*

- Arithmetic mean: 4.58 µm, 1.35*

- Median (D50): 3.89 µm, 1.27*

- Standard deviation, 5.55 µm, 0.38*

*Aspect Ratio