Abstract: A method of confirming reception of a drop of water has the steps of applying a powder on a surface of a gas sensing element, placing the element in a gas passage so as to expose the surface of the element to the gas passage, causing a measured gas to flow through the gas passage, receiving drops of water included in the measured gas on limited areas of the surface of the element such that the drops of water take out the powder applied on the limited areas from the element, and confirming the reception of the drops of water on the surface of the element. The powder has a melting point or a sublimation temperature equal to or higher than 1000° C.

Abstract: A method of confirming reception of a drop of water has the steps of applying a powder on a surface of a gas sensing element, placing the element in a gas passage so as to expose the surface of the element to the gas passage, causing a measured gas to flow through the gas passage, receiving drops of water included in the measured gas on limited areas of the surface of the element such that the drops of water take out the powder applied on the limited areas from the element, and confirming the reception of the drops of water on the surface of the element. The powder has a melting point or a sublimation temperature equal to or higher than 1000° C.

Abstract: A method and an apparatus for sample injection in gas chromatography increases the injecting volume of a sample, and can analyze any of high-boiling-point compounds, low-compounds boiling-point compounds, and compounds decomposed by heat. A sample is injected into a vaporizing chamber 6 having curved or crooked outer wall 6G and sample path S and formed of continuous inner walls 6H; the sample is temporarily held in the vaporizing chamber 6; then an objective compound is vaporized, and introduced into a separation column 17.

Abstract: To provide a method and an apparatus for sample injection in gas chromatography that can significantly increase the injecting volume of a sample, and can analyze any of high-boiling-point compounds, low-boiling-point compounds, and compounds decomposed by heat at a high accuracy.

Abstract: Disclosed is an adsorbent composed of porous beads of uncrosslinked or crosslinked chitosan, wherein protein A or lectin is covalent-bonded trough a bonding group to the amino group of glucosamine constituting the chitosan in the case of uncrosslinked chitosan or to the amino group of glucosamine constituting the chitosan and an amino group of a crosslinking agent in the case of crosslinked chitosan. The adsorbent composed of the chitosan porous beads to which protein A is bonded through a bonding group is used for absorption removal of interleukin 2 inhibitor. The adsorbent composed of the chitosan porous beads to which lectin is bonded through a combination group is used as an adsorbent for affinity chromatography.An adsorbent composed of porous beads of uncrosslinked or crosslinked chitosan is used for adsorbing immunoglobulin. An adsorbent composed of uncrosslinked or crosslinked chitosan wherein an .omega.