Manual static headspace sample injection device of injector and manual static headspace sample injection method of injector

Abstract

The invention discloses a manual static headspace sample injection device of an injector and a manual static headspace sample injection method of the injector. The device comprises a slope structure which is provided with an inclined plane with a set inclination angle; a sliding block which is arranged on the inclined plane through a sliding rail, wherein the sliding rail is parallel to the inclined direction of the inclined plane; a first supporting plate which is arranged at the uppermost end of the inclined plane, wherein an upper limiting structure is arranged on the first supporting plate; a second supporting plate which is arranged at the lowermost end of the inclined plane, wherein a lower limiting structure is arranged on the second supporting plate; a stand column which is arranged at one side of the inclined plane, wherein an upper base plate and a lower base plate are installed on the stand column, and through grooves are formed in the upper base plate and the lower base plate. The upper base plate, the lower base plate, the upper surface of the sliding block and the bottom of the slope structure are parallel, and the distance between the upper base plate and the lower base plate is equal to the length of a sampling injector sleeve. The device can improve the accuracy of single measurement and the efficiency of batch measurement.

Description

technical field [0001] The invention belongs to the technical field of content detection of dissolved gas in water bodies, and in particular relates to a manual static headspace sampling device and a sampling method for a syringe. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The static headspace method is a pretreatment method for measuring the dissolved gas content in natural water bodies. Its principle is to put a V L mL of water sample to be tested with V on the top G A glass syringe (50-100 ml) in an inert gas space, shake it at a constant temperature for a period of time, so that the dissolved gas in the water sample enters the gas phase from the water phase un...

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Problems solved by technology

[0004] The accuracy and precision of this method depend on whether the volumes of the water and gas phases in the glass syringe can be accurately measured, but the minimum scale of the sleeve of the commercially available syringe (50-100mL) is usually 2ml. On the one hand, manual water extraction and When the gas is used, it is difficult to ensure accurate extraction, which affects the accuracy of the measurement; on the other hand, when measuring samples in batches, it is necessary to read the volumes of the water phase and the gas phase for each measurement, which is time-consuming and laborious, and it is inevitable that different measurement personnel will be subjective when reading. Bias, which affects the comparability between measurement results

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