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以前在化探工作中,野外分析一直是使用蒸馏水.今年某些野外队经过多次的试验证明使用天然井水也可以不会影响质量.这样就降低了成本,同时也减少了设备及运输的困难.试验方法:在工作地区化验室周围的水井中取井水,用欲测定的元素既定的方法步骤进行空白试验.比如要测定铜,取井水5ml(因为所用药品及试液中的用水量都在5ml左右)放入比色管中加4ml4%的焦磷酸钠溶液,加一滴0.04%的麝香草酚蓝指示剂,用1∶1的氨水调整到蓝色(即弱硷性)加4ml四氯化碳,最后加入1ml0.2%的二乙氨基二硫代甲酸钠溶液,盖上比色管盖,猛烈振荡2分钟,看四氯化碳层中有否二乙氨基二硫代甲酸铜的颜色出现(黄色).如果经过多次试验都没有铜的反应,这种水就可以使用.测定其他元素也同样是按照欲测元素的既定方法步骤进行.这种试验最好是在踏勘设计时进行.如果在生产前的试验中确定了这个问题,那么生产中就可以不携带蒸馏锅.
In the past, in the field of geochemical exploration, the field analysis has always been to use distilled water.This field team has conducted several experiments this year to prove that the use of natural well water can not affect the quality, thus reducing the cost and reducing the cost of equipment and transportation Difficulty Test methods: Take well water from the wells around the laboratory in the work area and carry out blank tests with the established method steps of the elements to be measured, for example, to determine copper and take 5ml of well water (because the water used in the drugs and the test solution The amount of 5ml or so) into the tube plus 4ml4% 4% sodium pyrophosphate solution, add a drop of 0.04% thymol blue indicator, adjusted to blue with 1: 1 ammonia (ie, weak alkaline) plus 4ml carbon tetrachloride, and finally adding 1ml0.2% sodium diethyldithiocarbamate solution, capped with a colorimetric tube, shake vigorously for 2 minutes to see if the carbon tetrachloride layer of diethylaminodithioformate The color of the copper appears (yellow). This water can be used if there is no copper reaction after several tests. The determination of other elements is also done in accordance with the established method steps of the element to be measured. Design time, if the test before production is indeed Set this issue, then the production can not carry distillation pot.