钼蓝比色法测定钢铁中的磷,所用的显色剂是钼酸铵或其与酒石酸钾钠的混合液。当用单一的钼酸铵试剂时,为防止硅的干扰,应对硅的含量有一限制,但允许多少硅量存在,诸说不一。而用酒石酸钾钠-钼酸铵混合液时,各厂所取的浓度(指混合后的)也多不相同,大致有:10%～10%,这是最常用的一种; Molybdenum blue colorimetric determination of phosphorus in steel, the developer is ammonium molybdate or potassium tartrate and its mixture. When using a single ammonium molybdate reagent, in order to prevent the interference of silicon, there should be a limit to the content of silicon, but the amount of silicon allowed to exist, different. With sodium potassium tartrate - ammonium molybdate mixture, the concentration (referring to the mixed) varies from plant to plant, roughly: 10% to 10%, which is the most commonly used one;