mending jangan lewat japri... kita kan ingin tau juga.

Sample Preparation: Most of the sample preparation actually involves preparing a very small tube to hold the powder sample. This sample tube will be made from acetate cement as follows (see D27.1). Insert a piece of thin "sample tube" wire all the way into the tube of cement. Rotate the wire a few times and then slowly remove (you may get better results by doing this twice). Now let the wire dry for at least an hour hanging from a clip (perhaps over the radiator). When dry, place one end of the wire in a vice (now mounted in room 14), grasp the other end firmly with a pair of pliers and slowly pull on the wire. When you pull hard enough, the wire will start to give and then break. Remove the wire from the vice and clip off the smashed end that was in the vice with a pair of wire cutters. If there are any rough spots or burrs on either end of the wire try to smooth these out with your fingers or some emory cloth. Use the wire cutter to clip off a 15 mm length of the wire. You should find that the acetate cement now forms a sheath which can be slid along the wire. Slide the cement sheath to expose about a 10 mm tube ... this is your sample tube. (If this tube is messed up, try for another from your original piece of wire; you can make three of these tubes from one piece of wire).

^ itu sinar x ato infrared?