重金属盐 重金属指比重大于5的金属(一般指密度大于4.5g/cm3的金属)。重金属指的是相对原子质量大于55的金属。如铁的相对原子质量为56,大于55,故也是重金属。重金属约有45种,一般都是属于过渡元素。如铜、铅、锌、铁、钴、镍、锰、镉、汞、钨、钼、金、银等。尽管锰、铜、锌等重金属是生命活动所需要的微量元素,但是大部分重金属如汞、铅、镉等并非生命活动所必须,而且所有重金属超过一定浓度都对人体有毒。 有重金属元素参与组成的盐称为重金属盐。
贵重金属盐瓶 Salt shakers of precious metal ; precious metal salt shaker
贵重金属盐碟 salt cellars of precious metal
工业用贵重金属盐 Precious metals for industrial purposes ; precious metal salts for industrial use
重金属盐的微紫青霉菌 Penicillium janthinellum
有机重金属盐 Organic heavy metal salt
非贵重金属盐碟 non-precious metal salt dish
非贵重金属盐瓶 non-precious metal salt shaker
金属重氮盐印相法 metal-diazonium process
金属双硫腙是一类比较典型的光致变色化合物,在军事伪装、染料工业及重金属盐的监测等方面有着广泛的应用前景。
Dithizonate salt is one of the typical photochromic compounds and has widely used in military, dye industry, as well as in heavy metal detections.
方法:用HPLC色谱法对河南不同产地金银花进行绿原酸的含量测定,并对其灰分、酸不溶灰分、砷盐及重金属进行检测。
Methods: Flos Lonicerae from various areas of Henan province in its content of chlorogenic acid, ash, acid-insoluble ash, arsenate and heavy metals was determined with HPLC.
目的:检测当药片的重金属及砷盐的含量。
AIM: To detect the amount of heavy metals and As salt in Dangyao Tablets.
应用推荐