1 As the development of science and technology, the technology of the Hydrogen Flame Chromatographer has been improved a lot, the minimum detectable density is getting small-er and smaller.

2 That is the traditional testing method of the minimum detectable density of the Hydrogen Flame Chromatographer and the other technical indexes is to use hand made sample gas.

3 Some advantage of RFC-30 reagent free controller was described in different point of view by actual using. Some methods and notice were suggested for ion chromatographer with same instrument.

4 Objective Find out an optimum digesting method in the test of iodine in urine using As-Ce Catalytic Chromatographer.

5 The method that on-line elution in descending and horizontal development and the in-situ elution provide many new operations for the chromatographer.