Reaction mass of orthophosphoric acid and potassium dihexadecyl phosphate and dipotassium hexadecyl phosphate

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:

February 28, 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods

Qualifier:

according to guideline

Guideline:

other: ISO 17892-4:2004 Geotechnical investigation and testing -- Laboratory testing of soil -- Part 4: Determination of particle size distribution

Version / remarks:

2004

Deviations:

not specified

GLP compliance:

not specified

Type of method:

sieving

Type of particle tested:

primary particle

Type of distribution:

mass based distribution

Mass median aerodynamic diameter:

ca. 63 - ca. 600 µm

Remarks on result:

other: Standard deviation values were not provided the study report

Key result

Percentile:

other: D99.4

Mean:

ca. 63 - ca. 600 µm

Remarks on result:

other: Standard deviation values not provided

No.:

#1

Size:

> 600 µm

Distribution:

ca. 1.592 %

No.:

#2

Size:

> 500 µm

Distribution:

ca. 0.29 %

No.:

#3

Size:

> 355 µm

Distribution:

ca. 3.536 %

No.:

#4

Size:

> 250 µm

Distribution:

ca. 3.508 %

No.:

#5

Size:

> 212 µm

Distribution:

ca. 5.338 %

No.:

#6

Size:

> 150 µm

Distribution:

ca. 9.391 %

No.:

#7

Size:

> 90 µm

Distribution:

ca. 21.035 %

No.:

#8

Size:

> 63 µm

Distribution:

ca. 35.163 %

No.:

#9

Size:

< 63 µm

Distribution:

ca. 19.59 %

Results

Sieve (µm)	Weight of retained sample	Cumulative weigh (g)	Total sample weight (%)	Accumulated sample (%)	Test substance not retained (%)
600	0.801	0.801	1.592	1.592	98.408
500	0.146	0.947	0.29	1.882	98.118
355	1.7789	2.726	3.536	5.418	94.582
250	1.765	4.491	3.508	8.926	91.074
212	2.686	7.177	5.338	14.264	85.736
150	4.7251	11.902	9.391	23.655	76.345
90	10.5835	22.486	21.035	44.69	55.31
63	17.6919	40.177	35.163	79.853	20.147
End receiver	9.8565	50.034	19.59	99.443	0.557

Total mass measured was 50.0339 g (99.4% of initial mass).

Discussion

The sample was analysed using the sieve method down to an aperture of 63 µm. Analysis of the sample fraction passing through this mesh (20.147% of sample mass) has not been carried out and would require alternative methodology. 1.592% of the sample mass did not pass the 600 µm sieve, the largest aperture used. Visual examination of the retained particles indicated that these were all marginally larger than the sieve mesh and there were no anomalously large particles or agglomerations present. The particle sizes of the sample therefore formed a continuous and consistent distribution. The recovery of test substance from the experiment was 99.4%. Therefore, the validity criteria for this study (>99% recovery) was met.

Conclusions:

Under the study conditions, the particle size distribution of the test substance was determined continous and consistance (600 to 63 µm).

Executive summary:

A study was conducted to determine the particle size distribution of the test substance, mono- and di- C16 PSE, K+ H3PO4, according to ISO 17892-4 : 2004, using granulometry by sieving method. The sieves were stacked in mesh size order from largest aperture (top - 600 µm) to smallest aperture (bottom - 63 µm) and the sample aliquot weighed into a glass bowl (50.3142g). This was emptied into the top sieve and the bowl brushed out with a soft brush. The stack of sieves were placed on a mechanical shaker for 5 minutes at 95 rpm followed by 2 minutes manual agitation. The sieves were turned by 45° after each minute of shaking. Sieves were then removed consecutively from the stack and the contents carefully transferred to a weighing bowl. The sieve was brushed down with a soft brush to ensure quantitative transfer of material. The sample was analysed using the sieve method down to an aperture of 63 µm. Analysis of the sample fraction passing through this mesh (20.147% of sample mass) has not been carried out and would require alternative methodology. 1.592% of the sample mass did not pass the 600µm sieve, the largest aperture used. Visual examination of the retained particles indicated that these were all marginally larger than the sieve mesh and there were no anomalously large particles or agglomerations present. The particle sizes of the sample therefore formed a continuous and consistent distribution. The recovery of test substance from the experiment was 99.4%. Therefore, the validity criteria for this study (>99% recovery) was met. Under the study conditions, the particle size distribution of the test substance was determined continous and consistance (600 to 63 µm) (Chemex, 2018).

Description of key information

The particle size distribution of the test substance was determined according to ISO 17892-4:2004, using granulometry by sieving method (Chemex, 2018).

Additional information

Value used for CSA: >2000 µm