It is good to measure specific elements such as lead with solid electrodes.

If some users lack or know little about the professional knowledge of trace element analyzer, don't worry, as long as grasp the following points, you can easily deal with.

The first is repeatability stability, which is the most basic requirement of instrument and the basis of analysis and inspection. If this indicator is not good, others will not be able to talk about it. If the same sample is detected, the result is very high and low, which means that there is a problem with the instrument. If you look at the actual measurement of the instrument, some manufacturers are avoiding this problem because of the poor performance of the instrument and the fear of being seen by others. In fact, some manufacturers of instrument coefficient of variation between 10-20%, the error greatly exceeded the relevant provisions, so that the results of low credibility, our company's product coefficient of variation within the control of less than 5%, through the instrument test can be seen at a glance.

In electrochemistry, the electrode used in polarographic analysis is very small (refers to dropping mercury electricity), and the sensitivity is related to the specific surface area of the electrode, large area signal-to-noise ratio (refers to the ratio of signal to noise), high sensitivity, strong anti-interference ability, but because the dropping mercury electrode area depends on the volume, large will be uncontrolled dropping, so the electrode surface area is subject to. Serious constraints, this determines the conventional electrode made by the instrument noise, poor repeatability, which is currently all the use of such electrode instruments a common fault. Only our company's products can solve this problem by using a series of technologies such as static mercury electrode.

In this technology field, it is better than any similar instrument, which can be confirmed by field comparison. Another type of electrochemical instrument avoids this problem by using solid electrodes to measure all elements and attacking polarographic instruments from an environmental standpoint using mercury electrodes. In fact, mercury is in closed environment and does not contact with the atmosphere. Just like the sphygmomanometer, the current gauge is mercury mercury sphygmomanometer, which is still widely used. Polarographic analysis of dropping mercury electrode is a national standard and industry standard in many fields. For example, the determination of zinc in serum is prescribed by the Ministry of Health's inspection regulations, and the polarographic analysis standard in food is more. It is good to use solid electrode (such as glassy carbon electrode) to measure some specific elements such as lead, but it is impossible to use it to solve the problem of all elements detection, no matter in theory or in practice. Those who spend a lot of money on such instruments are either not knowledge-based or otherwise.

Trace element analysis is very technical because of its low content and small useful signal. Good repeatability, high sensitivity, stable performance of the instrument, bad repeatability, poor repeatability, the whole instrument foundation, we have to use various means to deal with users, conceal the truth, and users know little about it. The simplest way to judge is to see if the instrument is equipped with the function of conveniently overlapping and comparing multiple curves, observing repeatability directly, and calculating coefficient of variation conveniently. Further measurement of blood zinc, repeated testing to see whether the repeatability is good or bad, because zinc content is low, can check the performance of the instrument, do before the need to detect the blank, to prevent reagent blank caused by false.

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