Particle solid sample parallel double-sample preparation device

Abstract

The invention relates to a particle solid sample parallel double-sample preparation device, which comprises a sample separation plate and a separator, and is characterized by further comprising a lower sample separation box and an upper sample separation box, wherein the lower sample separation box is arranged at the bottom, the separator is arranged in the lower sample separation box, the separator covers the sample separation plate, and the upper sample separation box is inversely buckled on the sample separation plate; the separator is a chessboard type separator; the separator is divided into a plurality of isolation units with the same size, the number of the isolation units is an even number, the sample separation plate covering the separator is divided into a plurality of grids withthe same size according to the sizes of the isolation units, the size of each grid corresponds to the size of the isolation unit of the separator, and half of the number of the grids on the sample separation plate are hollowed out. Thus / ;p, high-precision parallel double-sample preparation can be carried out on a fine-particle solid sample.

Description

technical field [0001] The invention belongs to the field of solid-state sample dividers and is used for preparing high-precision and high-representative solid-state parallel double samples. Background technique [0002] According to my country's current "Technical Specifications for Soil Environment Monitoring" (HJ T166-2004), soil samples are required to be divided to 100 grams, and then ground to a particle size of 0.25 mm or 0.15 mm according to different analysis items before being sent to analysts for measurement. The current "Preparation Method of Coal Samples" (GB474-2008) requires the coal samples to be crushed step by step and shrunk to a particle size of 0.2 mm, and 60 to 300 grams should be reserved for analysis by analysts. However, in the supporting analysis methods such as "Industrial Analysis Methods of Coal" (GB / T 212-2008), "Determination of Total Mercury in Soil by Cold Atomic Absorption Spectrophotometry" (GB / T17136-1997), only the weighing Samples of a ...

AI Technical Summary

Problems solved by technology

For tens of grams of fine-grain solid samples below 0.25 mm, although the total particle number can meet the requirements, but because the total mass is too small, it is designed according to the technical requirements of the "Coal Sample Preparation Method" (GB474-2008) and other standards. Divider, can not achieve enough cutting frequency, sample preparation accuracy is difficult to guarantee

Moreover, fine particles are easily suspended in the air after being mechanically disturbed, and move with the air flow, forming loss and cross interference, thereby further increasing the error of mechanical sample preparation

The non-standard divider designed by companies such as Quanta Instruments in the United States based on the principle of rotary division can guarantee the accuracy, but the mechanical structure is complicated, the price is expensive, and the application range is limited.

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