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The standard needle depth is 3.6mm from the bottom of the sample vials (the volume is about 300ul), which can be considered as the amount of sample that cannot be extracted at the bottom. The recommended sample volume is 1mL.
There are two solutions:
1. Find the factory engineer to help adjust the position of the syringe. It can be adjusted down appropriately. It has reached the goal of extracting more samples. The advantage of this solution is that there is almost no extra overhead. The disadvantage is that if the adjustment is not Good or the quality of the injection vials is not good, similar to some brands, the bottom contraction height is inconsistent, which may cause damage to the syringe.
2. Adding an inner cannula to the autosampler vials has solved this problem. The advantage is that the scheme has a high insurance factor and is also a mature solution. The disadvantage is that the overhead of the consumables is relatively increased. If the sample volume is around 400 ul, the flat-bottomed cannula can be considered. The price of this product is relatively low and should be within the tolerance range.
There are two kinds of imported flat-bottomed inner cannula, an outer diameter of about 5.7mm. This inner cannula has a thin wall thickness and is not stable in a 9mm sample vials. It may damage the syringe, but the advantage is The adaptability is better, almost all brands of vialss can be used, another relatively high price of the outer diameter is 6mm, the inner cannula glass is much thicker, put the sample is obviously vertical, after the sample Better protection.
This is the end of the introduction of How much solution is needed for the autosampler vials? I hope it can help you.
