All analyses based on the “rule of three” would need a non existing perfect calibration linearity. The relation of any size of an analysis signal to any size of an analytical quantity for the calibration substance is kept as a signal independent constant. There is no working range limit. Even highest signals are transformed this way into a correlated quantity when the detector may have left already long before its correct functionality.
This fundamental problem of overrunning the working range limit is solved using EXPORT software which automatically checks the reduced post integration raw data and alarms (for instance just by a change of the data color on screen or in printed reports) when the working range limit is left.
To 7: A minimum of three calibration points surrounding the total range of chromatography signals - BUT MEASURED AS PEAK HEIGHT - is a must to check for linearity within the practical working range. As most of detector signal functions are of second or third order, five or six calibration points are the necessary minimum for correct calibration functions. The best mathematical model which handles this range of signal-to-quantity in analytical chromatography is the polynomial interpolation mathematics. The formula is simple:
Signal = A + B*weight + C*weight2 + D*weight3 
A, B, C, D are constant polynom factors which are found immediately using the proper software, which together with the graphics display of the found calibration function provides all ldata quality statistics but upon demand only. Trouble users may see is the fact, that they ask for weight data which are based on the signal values they got from their integrators. Polynomial interpolation software iterates weight-values from signal data. There is a ten page publication available in J. Planar Chromatogr. 18 (2005) 256-263 discussing all details of the polynomial interpolation mathematics in quantitative chromatography, so that here is no need to go into all details of the correlated statistics. Figure 3 below shows an application example, figure 4 clears the source for errors in calibration, not too seldom to find...
To 8: Most calibration substances have a limited purity. If it is known, all weight data for calibration substance “cs” must be corrected by the factor f = 0.01 * purity [weight %] using the purity value for substance “cs” given in weight-%.
To 9: Even very expensive or highly toxic test substances are often stored in “heavy weight mini” glasses closed by plastics. The latter guarantees a quite limited life time. Much more economical and especially safe for correct quantitative chromatography are “containers” which can be used for only four consecutive test runs and cost nearly nothing. Glass tube with 1.5 ... 2 mm outside, 0.5 mm inside diameter, closed by a micro flame on both ends does it. These micro ampoules contain only about 2...10 microliter solution good for 4 repeated calibration runs per selected concentration, see figure 1 above.
As chromatography acts everywhere, it also acts on any type of surface in any tool. No surface is completely free from water and after the first use for sample taking and giving, this surface is saturated with substances of the sample. The sample substances remain causing displacement chromatography. Thus we have a sorption process with saturation of the water layer, adsorption on the solid part of the surface and following “preparative” displacement chromatography. The surface is normally rough, thus the real surface size is easily ten times and more larger than calculated. Many surfaces are not only water wet but keep the substances used at production. On glass surfaces water can be removed only under flowing extremely dry gas at temperatures near the glass melting point or stay even in very high vacuum but in the second the glass surface is in contact with any wet gas, vapor or liquid, strong sorption starts quickly again. Thus the “substance memory” of any surface is a standard problem for trace analysis but also for high precision chromatography. Sample falsification by taking / giving the next sample is serious. What to do ?
10.1 Enrich traces prior sampling. This statement is correct although there is opposition against it.
10.2 Saturate surfaces, let the correct sample flow through prior final sampling.
10.3 Think of “dead volumes” where the sample flow is turbulent and remixes with mobile phase.
10.4 Keep mechanical inner diameters of containers as small as possible, avoid large diameter changes and have the total inner volume small enough, but think of the necessary saturation and equilibration when the sample is finally transferred into the analytical system. Every surface prior the separation column / capillary is of equal sample falsifying nature, keep it at a minimum.
10.5 Have the inner surface of any container or connection tube as smooth as possible.
10.6 Avoid temperature changes from cold at taking to warm at giving: the specifically substance saturated surface acts like a sponge which fills itself at low temperature and is pressed empty when getting warm.
10.7 Why not directly sampling into the separation system ? The successful way if traces count. This of course need separation systems which are easy portable and can be installed fast and tight.
10.8 If there is any way to “focus” the given sample into the smallest length along the separation direction, do it.
10.9 Syringes are sample containers falsifying the next sample. Any needle surface - often VERY rough and sorption active - is source for serious data falsification up to critical court cases especially when a critical (legal) limit of substance concentration counts. Water only is not the best cleaning liquid to get rid of polar substances like di ethylene glycol just as one example. The calibration syringe should not be used as analysis syringe in case concentrations of a critical substance differ between calibration and analysis.