There are two sentences that I really can’t translate; I hope everyone can help.

1. We have proposed a simple, rapid and versatile preconcentration technique, based on collecting trace analytes on a solvent-soluble filter and dissolving the filter and the analytes collected on it in a small volume of solvent. We have proposed a simple, rapid, and versatile pre-enrichment technique based on collecting trace amounts of the analyte using solvent-soluble filter paper, dissolving the filter paper, and recovering the analyte with a small volume of solvent.

When asking for help, try to provide context as much as possible, at least indicating what the topic is about. 1. We have proposed a simple, rapid and versatile preconcentration technique, based on collecting trace analytes on a solvent-soluble filter and dissolving the filter and the analytes collected on it in a small volume of solvent. We have proposed a simple, rapid, and versatile pre-enrichment technique that relies on using solvent-soluble filter paper to collect trace amounts of the analyte, followed by dissolving the filter paper along with the analyte enriched on it using a small amount of solvent. 2. If the counter cation is excessively hydrophobic, not only the analyte but also the free reagent added to convert the analyte into a collectable form remains on the filter, sometimes making the collection by filtration a time-consuming process. If the hydrophobicity of the counter-anion is too high, in addition to the component being analyzed, the cationic reagent used to convert it into a form that can be enriched will also remain on the filter paper; this can sometimes cause the collected component to develop color during prolonged filtration.

I made some personal adjustments: 1. We have proposed a simple, rapid, and versatile preconcentration technique, based on collecting trace analytes on a solvent-soluble filter and dissolving the filter along with the analytes collected on it in a small volume of solvent. We have proposed a simple, rapid, and versatile pre-enrichment technique based on using a solvent-soluble filter paper to collect trace analytes, with a small amount of solvent being used to dissolve the filter paper and the analytes accumulated on it. 2. If the counter cation is excessively hydrophobic, not only the analyte but also the free reagent added to convert the analyte into a collectable form remains on the filter, sometimes making the collection by filtration a time-consuming process. If the counter-anion is excessively hydrophobic, then both the analyte and the free reagent added to convert the analyte into an aggregable form will remain on the filter paper; therefore, aggregates are sometimes formed through prolonged filtration.

Should the latter part be translated as: …sometimes rendering the collection by filtration time-consuming. …which makes the filtering and collection process very time-consuming.

Look it up in a dictionary. Render (CAUSE) – verb, formal usage: 1. To cause someone or something to be in a particular state: His rudeness rendered me speechless. (To make something/someone be in a certain state)； result in)

Firstly, I think everyone has done a very good job with the translation. Second, if the counter cation is excessively hydrophobic, not only the analyte but also the free reagent added to convert the analyte into a form that can be collected remains on the filter, which sometimes makes the filtration process time-consuming. If the hydrophobicity of the counter-anion is too high, not only the component to be analyzed but also the cationic reagent used to convert it into an form that can be enriched will be retained on the filter paper, which often makes this filtration and enrichment process time-consuming.

2. If the counter cation is excessively hydrophobic, not only the analyte but also the free reagent added to convert the analyte into a collectable form remains on the filter, sometimes making the collection by filtration a time-consuming process. If the hydrophobicity of the counter-anion is too high, not only the component being analyzed but also the free reagent used to convert it into an aggregated state will be retained on the filter paper, which can sometimes make the filtration and enrichment process time-consuming.

The term \"counter cation\" refers to an opposite-phase cation, an antipodal cation, or a counter (cation). In this sentence, it means adding a counter ion that forms an ionic complex with the ion being analyzed; this causes the analyzed ion to change from being hydrophilic to hydrophobic, thereby allowing it to be precipitated or extracted. Here, such a counter ion might be a macromolecular organic cation. Therefore, the second sentence can be translated as: If the counter cation is excessively hydrophobic, not only the analyte but also the free reagent added to convert the analyte into a form that can be collected remains on the filter, which sometimes makes the filtration process time-consuming. If the hydrophobicity of the (cationic) ion is too high, not only the component being analyzed but also the unreacted (free) counterion reagent (used to convert the component being analyzed into a precipitate form) will remain on the filter paper, which can sometimes make the filtration and enrichment process time-consuming.