硒是人体必需的微量元素,可抑制癌肿和心血管疾病的发生发展。硒含量过低将导致人营养不良。目前,对人体内硒的研究正在不断深入。对微量硒的测定,常用方法有气相色谱法,荧光法,原子吸收氢化物法,石墨炉原子吸收法等。其中石墨炉原子吸收法因取样量小,不需复杂的前处理、灵敏度高而被广泛采用。通过加入不同的基体改进剂,可大幅度提高硒的灰化温度,消除基体干扰,从而对人乳样品可不经消化直接上机测定。对于测硒的基体改进剂,常用的有镍、铜,但测样时仍需采用标准加入法,最近有报道采用贵金属作基体改进剂效果更好,可明显提高测定的灵敏度和 Selenium is an essential trace element of the human body, can inhibit the occurrence and development of cancer and cardiovascular diseases. Low selenium levels can lead to malnutrition. At present, the research on selenium in human body is deepening. Determination of trace selenium, commonly used methods are gas chromatography, fluorescence, atomic absorption hydride method, graphite furnace atomic absorption method. Among them graphite furnace atomic absorption method is widely used because of the small amount of sample, without complicated pretreatment and high sensitivity. By adding different matrix modifiers, the ashing temperature of selenium can be greatly increased, and matrix interference can be eliminated, so that the human milk sample can be measured directly without digestion. For selenium matrix modifier, commonly used in nickel, copper, but the sample still need to use standard addition method, recently reported that the use of precious metals as a matrix modifier better, can significantly improve the sensitivity and