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<t>FlFFF</t> fractograms of the FYM pore water sample showing elemental signals (a–e) and the UV signal (f) as a function of colloid retention time ( T r ), which corresponds to increasing colloid size. Organic colloids (<5 nm) elute at T r < 300 s, while larger mineral colloids (5–450 nm) elute at T r > 300 s. The red line in (a) shows the molar Si/Al ratio of the mineral colloids, the dotted red line indicates the Si/Al ratio of the clay fraction isolated from the soil. In the largest size fraction ( T r > 3700 s), the Si/Al ratio (2.1), matches that of the isolated clay. The blue line in (b) shows the molar Fe/Al ratio of the mineral colloids, the dotted blue line the ratio of the isolated clay. The Fe/Al ratio in the mineral colloids is only slightly higher than in the isolated clay.
Field Flow Fractionation Flfff, supplied by Postnova Analytics, used in various techniques. Bioz Stars score: 86/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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field flow fractionation flfff - by Bioz Stars, 2026-07
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symmetrical flow field flow fractionation flfff system  (Postnova Analytics)
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<t>FlFFF</t> fractograms of the FYM pore water sample showing elemental signals (a–e) and the UV signal (f) as a function of colloid retention time ( T r ), which corresponds to increasing colloid size. Organic colloids (<5 nm) elute at T r < 300 s, while larger mineral colloids (5–450 nm) elute at T r > 300 s. The red line in (a) shows the molar Si/Al ratio of the mineral colloids, the dotted red line indicates the Si/Al ratio of the clay fraction isolated from the soil. In the largest size fraction ( T r > 3700 s), the Si/Al ratio (2.1), matches that of the isolated clay. The blue line in (b) shows the molar Fe/Al ratio of the mineral colloids, the dotted blue line the ratio of the isolated clay. The Fe/Al ratio in the mineral colloids is only slightly higher than in the isolated clay.
Symmetrical Flow Field Flow Fractionation Flfff System, supplied by Postnova Analytics, used in various techniques. Bioz Stars score: 86/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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flow field flow fractionation (flfff  (Postnova Analytics)
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Postnova Analytics flow field flow fractionation (flfff
<t>FlFFF</t> fractograms of the FYM pore water sample showing elemental signals (a–e) and the UV signal (f) as a function of colloid retention time ( T r ), which corresponds to increasing colloid size. Organic colloids (<5 nm) elute at T r < 300 s, while larger mineral colloids (5–450 nm) elute at T r > 300 s. The red line in (a) shows the molar Si/Al ratio of the mineral colloids, the dotted red line indicates the Si/Al ratio of the clay fraction isolated from the soil. In the largest size fraction ( T r > 3700 s), the Si/Al ratio (2.1), matches that of the isolated clay. The blue line in (b) shows the molar Fe/Al ratio of the mineral colloids, the dotted blue line the ratio of the isolated clay. The Fe/Al ratio in the mineral colloids is only slightly higher than in the isolated clay.
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flow field-flow fractionation (flfff) model pn-1021-fo  (Postnova Analytics)
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<t>FlFFF</t> fractograms of the FYM pore water sample showing elemental signals (a–e) and the UV signal (f) as a function of colloid retention time ( T r ), which corresponds to increasing colloid size. Organic colloids (<5 nm) elute at T r < 300 s, while larger mineral colloids (5–450 nm) elute at T r > 300 s. The red line in (a) shows the molar Si/Al ratio of the mineral colloids, the dotted red line indicates the Si/Al ratio of the clay fraction isolated from the soil. In the largest size fraction ( T r > 3700 s), the Si/Al ratio (2.1), matches that of the isolated clay. The blue line in (b) shows the molar Fe/Al ratio of the mineral colloids, the dotted blue line the ratio of the isolated clay. The Fe/Al ratio in the mineral colloids is only slightly higher than in the isolated clay.
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flow field-flow fractionation (flfff) pn-1021-fo  (Postnova Analytics)
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<t>FlFFF</t> fractograms of the FYM pore water sample showing elemental signals (a–e) and the UV signal (f) as a function of colloid retention time ( T r ), which corresponds to increasing colloid size. Organic colloids (<5 nm) elute at T r < 300 s, while larger mineral colloids (5–450 nm) elute at T r > 300 s. The red line in (a) shows the molar Si/Al ratio of the mineral colloids, the dotted red line indicates the Si/Al ratio of the clay fraction isolated from the soil. In the largest size fraction ( T r > 3700 s), the Si/Al ratio (2.1), matches that of the isolated clay. The blue line in (b) shows the molar Fe/Al ratio of the mineral colloids, the dotted blue line the ratio of the isolated clay. The Fe/Al ratio in the mineral colloids is only slightly higher than in the isolated clay.
Flow Field Flow Fractionation (Flfff) Pn 1021 Fo, supplied by Postnova Analytics, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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asymmetrical flow field flow fractionator (flfff) af2000 mid temperature  (Postnova Analytics)
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<t>FlFFF</t> fractograms of the FYM pore water sample showing elemental signals (a–e) and the UV signal (f) as a function of colloid retention time ( T r ), which corresponds to increasing colloid size. Organic colloids (<5 nm) elute at T r < 300 s, while larger mineral colloids (5–450 nm) elute at T r > 300 s. The red line in (a) shows the molar Si/Al ratio of the mineral colloids, the dotted red line indicates the Si/Al ratio of the clay fraction isolated from the soil. In the largest size fraction ( T r > 3700 s), the Si/Al ratio (2.1), matches that of the isolated clay. The blue line in (b) shows the molar Fe/Al ratio of the mineral colloids, the dotted blue line the ratio of the isolated clay. The Fe/Al ratio in the mineral colloids is only slightly higher than in the isolated clay.
Asymmetrical Flow Field Flow Fractionator (Flfff) Af2000 Mid Temperature, supplied by Postnova Analytics, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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symmetrical flow field-flow fractionation (flfff) system model pn-1021-fo  (Postnova Analytics)
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Postnova Analytics symmetrical flow field-flow fractionation (flfff) system model pn-1021-fo
<t>FlFFF</t> fractograms of the FYM pore water sample showing elemental signals (a–e) and the UV signal (f) as a function of colloid retention time ( T r ), which corresponds to increasing colloid size. Organic colloids (<5 nm) elute at T r < 300 s, while larger mineral colloids (5–450 nm) elute at T r > 300 s. The red line in (a) shows the molar Si/Al ratio of the mineral colloids, the dotted red line indicates the Si/Al ratio of the clay fraction isolated from the soil. In the largest size fraction ( T r > 3700 s), the Si/Al ratio (2.1), matches that of the isolated clay. The blue line in (b) shows the molar Fe/Al ratio of the mineral colloids, the dotted blue line the ratio of the isolated clay. The Fe/Al ratio in the mineral colloids is only slightly higher than in the isolated clay.
Symmetrical Flow Field Flow Fractionation (Flfff) System Model Pn 1021 Fo, supplied by Postnova Analytics, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/field+flow+fractionation+flfff/pm20174983-32-2-10?v=Postnova+Analytics
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symmetrical flow field-flow fractionation (flfff) system model pn-1021-fo - by Bioz Stars, 2026-07
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symmetrical flow field-flow fractionation (flfff) system  (Postnova Analytics)
90
Postnova Analytics symmetrical flow field-flow fractionation (flfff) system
<t>FlFFF</t> fractograms of the FYM pore water sample showing elemental signals (a–e) and the UV signal (f) as a function of colloid retention time ( T r ), which corresponds to increasing colloid size. Organic colloids (<5 nm) elute at T r < 300 s, while larger mineral colloids (5–450 nm) elute at T r > 300 s. The red line in (a) shows the molar Si/Al ratio of the mineral colloids, the dotted red line indicates the Si/Al ratio of the clay fraction isolated from the soil. In the largest size fraction ( T r > 3700 s), the Si/Al ratio (2.1), matches that of the isolated clay. The blue line in (b) shows the molar Fe/Al ratio of the mineral colloids, the dotted blue line the ratio of the isolated clay. The Fe/Al ratio in the mineral colloids is only slightly higher than in the isolated clay.
Symmetrical Flow Field Flow Fractionation (Flfff) System, supplied by Postnova Analytics, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/field+flow+fractionation+flfff/10__1007_slash_s00216___010___3511___4-32-2-10?v=Postnova+Analytics
Average 90 stars, based on 1 article reviews
symmetrical flow field-flow fractionation (flfff) system - by Bioz Stars, 2026-07
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FlFFF fractograms of the FYM pore water sample showing elemental signals (a–e) and the UV signal (f) as a function of colloid retention time ( T r ), which corresponds to increasing colloid size. Organic colloids (<5 nm) elute at T r < 300 s, while larger mineral colloids (5–450 nm) elute at T r > 300 s. The red line in (a) shows the molar Si/Al ratio of the mineral colloids, the dotted red line indicates the Si/Al ratio of the clay fraction isolated from the soil. In the largest size fraction ( T r > 3700 s), the Si/Al ratio (2.1), matches that of the isolated clay. The blue line in (b) shows the molar Fe/Al ratio of the mineral colloids, the dotted blue line the ratio of the isolated clay. The Fe/Al ratio in the mineral colloids is only slightly higher than in the isolated clay.

Journal: Environmental Science. Nano

Article Title: Visualization of pore water colloids in intact soil using a new diffusive gradients in thin films (DGT)-based approach

doi: 10.1039/d5en01069a

Figure Lengend Snippet: FlFFF fractograms of the FYM pore water sample showing elemental signals (a–e) and the UV signal (f) as a function of colloid retention time ( T r ), which corresponds to increasing colloid size. Organic colloids (<5 nm) elute at T r < 300 s, while larger mineral colloids (5–450 nm) elute at T r > 300 s. The red line in (a) shows the molar Si/Al ratio of the mineral colloids, the dotted red line indicates the Si/Al ratio of the clay fraction isolated from the soil. In the largest size fraction ( T r > 3700 s), the Si/Al ratio (2.1), matches that of the isolated clay. The blue line in (b) shows the molar Fe/Al ratio of the mineral colloids, the dotted blue line the ratio of the isolated clay. The Fe/Al ratio in the mineral colloids is only slightly higher than in the isolated clay.

Article Snippet: The colloids in pore waters were characterised with field flow fractionation (FlFFF) (AF2000, Postnova Analytics) online coupled with a UV/vis detector (SPD-20A Postnova Analytics) and with ICP-MS with a previously described method, further instrumental details are in Section S3.

Techniques: Isolation