首先,你需要一个干净的线圈。铂或镍铬环是最常见的。可以通过浸入盐酸或硝酸中清洗它们,然后用蒸馏水或去离子水冲洗。通过将环路插入气体火焰中来测试环路的清洁度。如果产生颜色突发,则环路不够干净。必须在测试之间清除循环。将清洁环浸入粉末或离子(金属)盐溶液中。将带有样品的环放置在火焰的透明或蓝色部分中,并观察所得的颜色。木质夹板或棉签方法。木质夹板或棉签提供了一种廉价的线圈替代品。要使用木质夹板,将它们浸泡在蒸馏水中过夜。倒出水并用清水冲洗夹板,小心避免用钠污染水(如手上的汗水)。取一块已浸湿在水中的湿夹板或棉签,将其浸入待测样品中,然后将夹板或棉签挥动穿过火焰。不要将样品放在火焰中,因为这会导致夹板或棉签点燃。每次测试都使用新的夹板或棉签。

新西兰奥克兰理工大学Assignment代写:如何做火焰测试

First, you need a clean wire loop. Platinum or nickel-chromium loops are most common. They may be cleaned by dipping in hydrochloric or nitric acid, followed by rinsing with distilled or deionized water. Test the cleanliness of the loop by inserting it into a gas flame. If a burst of color is produced, the loop is not sufficiently clean. The loop must be cleaned between tests. The clean loop is dipped in either a powder or solution of an ionic (metal) salt. The loop with sample is placed in the clear or blue part of the flame and the resulting color is observed. Wooden Splint or Cotton Swab Method.Wooden splints or cotton swabs offer an inexpensive alternative to wire loops. To use wooden splints, soak them overnight in distilled water. Pour out the water and rinse the splints with clean water, being careful to avoid contaminating the water with sodium (as from sweat on your hands). Take a damp splint or cotton swab that has been moistened in water, dip it in the sample to be tested, and wave the splint or swab through the flame. Do not hold the sample in the flame as this would cause the splint or swab to ignite. Use a new splint or swab for each test.

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