The present invention relates to a detection method for determining chloride ions content in sea sand, which is performed in the steps as follows: drying sea sand to a constant weight, adding the dried sea sand to boiling deionized water, and fully stirring, standing and filtering the deionized water to obtain washed sea sand and a washed filtrate; then grinding the washed sea sand into powder, adding the powder into deionized water, fully stirring and filtering the deionized water to obtain a powder filtrate; next, taking half of the washed filtrate and half of the powder filtrate, mixing and stirring the two to prepare a mixed filtrate; and measuring the chloride ions content in each of the washed filtrate, the powder filtrate and the mixed filtrate by using a silver nitrate titration method; finally, analyzing and correcting detection results to obtain the chloride ions content in the sea sand. The present invention promotes the release of the chloride ions in the tight-wrapping surface films and fissures of the sea sand to a great extent, providing a scientific guarantee for the authenticity of the detection results on the chloride ions content in the sea sand; and realizes the quick dissolution of the chloride ions, thereby greatly reducing the detection time and significantly increasing the accuracy of the detection results.

The present invention relates to a detection method for determining chloride ions content in sea sand, which is performed in the steps as follows: drying sea sand to a constant weight, adding the dried sea sand to boiling deionized water, and fully stirring, standing and filtering the deionized water to obtain washed sea sand and a washed filtrate; then grinding the washed sea sand into powder, adding the powder into deionized water, fully stirring and filtering the deionized water to obtain a powder filtrate; next, taking half of the washed filtrate and half of the powder filtrate, mixing and stirring the two to prepare a mixed filtrate; and measuring the chloride ions content in each of the washed filtrate, the powder filtrate and the mixed filtrate by using a silver nitrate titration method; finally, analyzing and correcting detection results to obtain the chloride ions content in the sea sand. The present invention promotes the release of the chloride ions in the tight-wrapping surface films and fissures of the sea sand to a great extent, providing a scientific guarantee for the authenticity of the detection results on the chloride ions content in the sea sand; and realizes the quick dissolution of the chloride ions, thereby greatly reducing the detection time and significantly increasing the accuracy of the detection results.

Embodiments of the invention relate to a clinical instrument analyzer system for the automatic analysis of patient samples. In one embodiment, the analyzer may be used to analyze bodily fluid samples, such as blood, plasma, serum, urine or cerebrospinal fluid, for example. Embodiments of the invention relate to an apparatus and method, for example, an immunoassay method, for separating out target molecules in a magnetic field and then analyzing those target molecules with a luminometer.

Embodiments of the invention relate to a clinical instrument analyzer system for the automatic analysis of patient samples. In one embodiment, the analyzer may be used to analyze bodily fluid samples, such as blood, plasma, serum, urine or cerebrospinal fluid, for example. Embodiments of the invention relate to an apparatus and method, for example, an immunoassay method, for separating out target molecules in a magnetic field and then analyzing those target molecules with a luminometer.

A sensor system comprising a housing having an inlet aperture through which fluid enters the housing and a conditioning material in the housing, the conditioning material being adapted to control levels of a substance within the housing. The sensor system comprises a sensor for analysing the fluid in the housing. The sensor system comprises circulation means which is configured to alternate circulation of fluid within the housing between a sensing fluid path in which the fluid is analysed by the sensor and a second fluid path in which the fluid flow is conditioned. A method for analysing fluid in a housing using a sensor is also provided.

A sensor system comprising a housing having an inlet aperture through which fluid enters the housing and a conditioning material in the housing, the conditioning material being adapted to control levels of a substance within the housing. The sensor system comprises a sensor for analysing the fluid in the housing. The sensor system comprises circulation means which is configured to alternate circulation of fluid within the housing between a sensing fluid path in which the fluid is analysed by the sensor and a second fluid path in which the fluid flow is conditioned. A method for analysing fluid in a housing using a sensor is also provided.

Improved formulations for purification of peptide from biological samples and methods and kits for purifying peptides from biological samples (e.g., cells and tissues), as well as use of purified peptides (e.g., polypeptides derived from protein digests) in mass spectrometry (e.g., LC-MS) applications are described.

Improved formulations for purification of peptide from biological samples and methods and kits for purifying peptides from biological samples (e.g., cells and tissues), as well as use of purified peptides (e.g., polypeptides derived from protein digests) in mass spectrometry (e.g., LC-MS) applications are described.

Paraffin-embedded tissue is prepared removing paraffin from the tissue. The paraffin is removed by generating an electric field effective to produce plasma and direct charged species of the plasma to the paraffin, thereby rendering the paraffin responsive to the electric field. The electric field may move the paraffin out from the tissue due to electrostatic force. Movement of the paraffin may be assisted by moving an electrode utilized to generate the electric field relative to the paraffin. Movement of the paraffin also may be assisted by applying a solvent and/or heat energy to the tissue.

A method for separating and enriching sperm from a tissue sample comprises: obtaining a microfluidic separating system having an inlet end and an outlet end, and a membrane filter (e.g., hollow fiber membrane filter) fluidly connected to the outlet end; separating the tissue sample via the microfluidic separating system into a debris fluid volume and a sperm fluid volume; and enriching the sperm fluid volume by removing excess media via the membrane filter. A two-stage tissue sample separation system comprising: a microchannel structure defining a separation fluid channel to form a separation stage; an inlet end of the microchannel structure; an outlet end of the microchannel structure; and a membrane filter fluidly connected to the outlet end for removal of at least a portion of excess media in the tissue sample.