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Depending on the ink and the solvent used for the chromatography, the ink might also migrate and be separated into its components or smear over the paper. With the graphite of a pencil, this will not happen.

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โˆ™ 2008-09-09 16:23:11
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Q: In preparing the filter paper for chromatographic analysis a pencil was used when drawing the baseline on which to position the spots of metal ion solutions. Why is ink never used?
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Why does the baseline need to be drawn in pencil?


What elements are included in the Performance Measurement Baseline?

Schedule Cost Scope

What is the standard state of an element?

The standard state of an element provides a constant baseline from which all other measurements are made.

What configuration baseline is used to define design requirements for each of the components or configuration items of a system?

This is a programing software. It allows the user to design which requirements will need to be in place.

What is a blank solution? we_objectID=299&rb_select_l=B&rb_search=&PHPSESSID=363d Glossary ---- blank solution 1. a solution that does not contain a detectable amount of the analyte of interest. The blank solution is typically used for calibration purposes. Depending on its purpose the following blank solutions can be defined: Calibration blank (the solution used for creating the zero concentration point of the calibration graph; this solution contains only the diluent used for making the standard solution) 2. Reagent blank (a blank solution that contains the reagents used to dissolve the samples such as acids used for digestion; the reading for this solution is typically substracted from sample readings) 3. Method blank (a blank solution that has been handled similar to a sample, and to which the same reagents have been added, that had contact to the same type of vessels and that was treated by a similar procedure. This solution than is handled to monitor any type of contamination taking place with the method used. The correct treatment of the analytical result for the blank solution does have a significant effect on the correctness of analytical results, especially for samples having analyte concentrations close to the limit of quantitation. Especially the measurement of the reagent and method blank must be well differentiated from the baseline correction.

Related questions

A comprehensive industrial hygiene analysis is a?

Baseline Survey

Does a Job Safety Analysis determine initial hazards in a workplace?

No, a baseline analysis identifies initial hazards in the workplace.

Which core element of VPP discusses baseline safety and health hazard analysis?

Worksite analyses

What is comparative analysis?

Selects/Develops Baseline Comparison System (BCS) that represents characteristics of New System. Provides basis for support planning and readiness analysis. (How will system be used, maintained; (MTBF, MTTR, ALDT)

What determines initial hazards in the workplace and is modified as areas in the workplace change?

A baseline analysis identifies initial hazards in the workplace and is modified as the workplace changes.

How do you use the word baseline in a sentence?

There was a baseline for software construction in company. This is an example sentence containing baseline word.

What is a baseline?

A baseline is a line which is the base for measurement or construction.

How far is it from baseline to baseline?

94 ft in the NBA.


performance of a baseline hazard analysis, evaluation of new process or products, and investigation of employee's signs of illness

How big is the singles court?

The baseline is 27 feet wide. To walk from the baseline to the net, it's 39 feet. That means from baseline to baseline, it is 78 feet.

What is the legnth of a basketball court?

94 feet baseline to baseline

How long is tennis court?

78 feet from baseline to baseline.

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