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at retention time vs in retention time

Both "at retention time" and "in retention time" are commonly used phrases in the context of chromatography. They are interchangeable and can be used to refer to the specific time at which a compound elutes from a chromatographic column.

Last updated: March 30, 2024 • 608 views

at retention time

This phrase is correct and commonly used in the context of chromatography.

This phrase is used in chromatography to refer to the specific time at which a compound elutes from a chromatographic column.

Examples:

The peak appeared at retention time 5.6 minutes.
The compound was detected at retention time 7.2 minutes.

Show examples from the web [+]

The analyte shall elute at the retention time that is typical for the corresponding calibration standard under the same experimental conditions.
The chromatogram should not show a peak at the retention time of the GMPA peak.
Thus, it is possible to control the sludge retention time at any pre-selected value by the control of the waste sludge flow rate, Q1.
Identify the peaks by their retention times.
The retention time (or relative retention time) of the analyte in the test portion shall match that of the calibration standard within a specified retention time window.
It has the same retention time as ibuprofen.
The retention time of lactose is ca. 11 min.
It shall preferably be a related substance with a retention time close to that of the analyte.
retention times of reference compounds used for calibration,
Under the conditions described the retention time of vanillin is about 9 minutes.
Their retention times shall be established and recorded.
The retention times are determined, preferably on a recording integrator linked to the detection system.
The retention time is determined in duplicate.
Quantitative analytical methods are not required and only the determination of retention times is necessary.
Identify the peaks from the retention times by comparing them with mixtures of waxes with known retention times, analysed under the same conditions.
Normally the mean hydraulic retention time is 6 h and the mean sludge age (sludge retention time) is 6 to 10 days.
In any case, the minimum acceptable retention time for the analyte under examination is twice the retention time corresponding to the void volume of the column.
If the retention time of sample is outside the range of retention times obtained for the standards, a limit value should be quoted.
The capacity factors k' are calculated from the dead time to and retention times tR of the selected reference substances according to equation 4 (see section 1.2).
A documented procedure should be established to define the controls needed for the identification, storage, protection, retrieval, retention time and disposition of records.

Alternatives:

in retention time
during retention time
around retention time
near retention time
within retention time

in retention time

This phrase is correct and commonly used in the context of chromatography.

This phrase is used in chromatography to refer to the specific time at which a compound elutes from a chromatographic column.

Examples:

The peak appeared in retention time 5.6 minutes.
The compound was detected in retention time 7.2 minutes.

Show examples from the web [+]

Comparison with an appropriate reference standard of Maltitol shows that the principle peak in the chromatogram of the test solution is similar in retention time to the principal peak in the chromatogram obtained with the reference solution (ISO 10504:1998).
Operation of the column at room temperature is possible, provided that the room temperature does not fluctuate more than 1 ºC, otherwise too much variation in the retention time of GMPÅ takes place.
The retention time in the VIS is five years, i.e. 60 months, so a 'reuse' period of 59 months ensures that the data on the applicant is still available.
Identify the peaks by their retention times.
The retention time (or relative retention time) of the analyte in the test portion shall match that of the calibration standard within a specified retention time window.
It has the same retention time as ibuprofen.
The retention time of lactose is ca. 11 min.
It shall preferably be a related substance with a retention time close to that of the analyte.
retention times of reference compounds used for calibration,
Under the conditions described the retention time of vanillin is about 9 minutes.
Their retention times shall be established and recorded.
The retention times are determined, preferably on a recording integrator linked to the detection system.
The retention time is determined in duplicate.
Quantitative analytical methods are not required and only the determination of retention times is necessary.
Identify the peaks from the retention times by comparing them with mixtures of waxes with known retention times, analysed under the same conditions.
Normally the mean hydraulic retention time is 6 h and the mean sludge age (sludge retention time) is 6 to 10 days.
In any case, the minimum acceptable retention time for the analyte under examination is twice the retention time corresponding to the void volume of the column.
If the retention time of sample is outside the range of retention times obtained for the standards, a limit value should be quoted.
The capacity factors k' are calculated from the dead time to and retention times tR of the selected reference substances according to equation 4 (see section 1.2).
A documented procedure should be established to define the controls needed for the identification, storage, protection, retrieval, retention time and disposition of records.

Alternatives:

at retention time
during retention time
around retention time
near retention time
within retention time

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