I can only help with literature on this issue.

http://www.chromatographyonline.com/hollow-fibre-liquid-phase-microextraction-three-phase-mode-practical-considerations

Thank you Vladimir.

Hi José

References 1

https://www.sciencedirect.com/science/article/pii/S1021949815001490

2

https://www.scientiachromatographica.com/files/v5n3/v5n3a02.pdf

3

https://www.ncbi.nlm.nih.gov/pubmed/22821496

4

https://www.mdpi.com/1420-3049/19/5/6776/pdf

5

https://www.mdpi.com/2077-0375/7/1/8/pdf

6

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=6&cad=rja&uact=8&ved=0ahUKEwiKn46_q7jWAhWjAJoKHS1PAgsQFghPMAU&url=https%3A%2F%2Fwww.researchgate.net%2Fpublication%2F232941528_Analytical_Applications_of_Hollow_Fiber_Liquid_Phase_Microextraction_HF-LPME_A_Review&usg=AFQjCNGlYA_NFnUgBQ11R5fE8X9Y4Prd_w

7

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&cad=rja&uact=8&ved=0ahUKEwiKn46_q7jWAhWjAJoKHS1PAgsQFghUMAY&url=https%3A%2F%2Fwww.researchgate.net%2Fpublication%2F45094021_Application_of_hollow_fiber-based_liquid-phase_microextraction_HF-LPME_for_the_determination_of_acidic_pharmaceuticals_in_wastewaters&usg=AFQjCNHOCocACcJe7UrWLIX_v0N9ssJY3g

8

https://chromsci.oxfordjournals.org/content/early/2016/11/29/chromsci.bmw188.full.pdf

9

https://www.tandfonline.com/doi/abs/10.1080/00032719.2012.655676

10

https://link.springer.com/10.1007%2Fs00604-012-0773-x

11

http://dugi-doc.udg.edu/bitstream/handle/10256/7509/tesp.pdf?sequence=1

12

https://esc.fnwi.uva.nl/thesis/centraal/files/f943495035.pdf

13

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=13&cad=rja&uact=8&ved=0ahUKEwis9u-1rLjWAhWoJZoKHcchA6M4ChAWCDQwAg&url=http%3A%2F%2Fwww.bcc.bas.bg%2FBCC_Volumes%2FVolume_49_Number_1_2017%2FEbadi-1-Wu-BCC-49-1-2017-151-156.pdf&usg=AFQjCNECXUYkUDTJGfNAbg7woS2gX_8BRA

14

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=14&cad=rja&uact=8&ved=0ahUKEwis9u-1rLjWAhWoJZoKHcchA6M4ChAWCDkwAw&url=http%3A%2F%2Fwww.scielo.br%2Fscielo.php%3Fscript%3Dsci_arttext%26pid%3DS0103-50532014000800023&usg=AFQjCNFL3ymFME7fkKLyGIAeTLgqfdkNKg

15

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=15&cad=rja&uact=8&ved=0ahUKEwis9u-1rLjWAhWoJZoKHcchA6M4ChAWCEIwBA&url=http%3A%2F%2Fpubmedcentralcanada.ca%2Fpmcc%2Farticles%2FPMC5019127%2F&usg=AFQjCNGQYhx7irOfrhGLcs3d_F4ViGU7_w

16

https://www.scirp.org/Journal/PaperInformation.aspx?PaperID=3727

17

https://www.diva-portal.org/smash/get/diva2:337869/FULLTEXT01.pdf

18

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=18&cad=rja&uact=8&ved=0ahUKEwis9u-1rLjWAhWoJZoKHcchA6M4ChAWCFUwBw&url=http%3A%2F%2Fwww.derpharmachemica.com%2Fpharma-chemica%2Fanalysis-of-nitrosodiethylamine-ndea-in-indonesia-salted-fish-with-hollow-fiberliquid-phase-microextraction-gas-chromato.pdf&usg=AFQjCNEkjWTKsRxPGtV9KtLqETQR4ZCe0Q

19

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=19&cad=rja&uact=8&ved=0ahUKEwis9u-1rLjWAhWoJZoKHcchA6M4ChAWCFkwCA&url=http%3A%2F%2Fpubs.rsc.org%2Fen%2Fcontent%2Farticlelanding%2F2016%2Fra%2Fc6ra18798f&usg=AFQjCNFDcxsuFxq6zuv4upo8C-NLg0TlNA

20

https://lup.lub.lu.se/record/a25499df-fdc8-492e-b465-762cd0da635c