By gas chromatography. Conditions: column for a stainless steel column of high purity helium price, long 6m, the inner diameter of 4mm. Filling material for PoraPakQ, or similar goods. Carrier gas is hydrogen [99.99% (V / V)], flow rate 40ml / min. With loop injector. Pyroelectric detector for conductivity detector. The column temperature was 60 ℃. Detector temperature 130 ℃. Operation: The specimen helium gas sampling valve is fed by a gas chromatograph. Select the GC operating conditions, so that the standard is not lower than the peak signal equivalent to 70% of full scale reading, it will give the complete separation of oxygen from nitrogen and helium (nitrogen and oxygen may be unable to distinguish from each other). The residence time from the peak of the response values ??obtained for samples shown, the air should be a standard helium test sample (technical grade helium is mixed by 1.0% air, provided by the manufacturer) peak response obtained considerable, and shows no more than 1.0% of the amount of air (by volume), and He content should be not less than 99.0% (by volume high purity Helium Helium purity> 99.999%, impurity content (ppm): O2≤0.5, N2≤1.0, CO≤0.5, CO2≤0.5, CH4≤0.5, H2O≤0.5 high purity helium, Ne≤8.0; 1. He is second only to the light elements hydrogen helium density is about one-seventh of the atmospheric density of helium is a national. The only gas filled balloons regulations. 2. Helium is the most stable and inert gas as a protective atmosphere are widely used in fiber optic cable, air-conditioning equipment in the production process in the industry, Qingdao high-purity helium, helium is often gas detection products as physical and chemical properties of the carrier gas. 4, helium mass spectrometer leak detector using the media has become the best choice for atomic helium 3. Based on the safety of helium, inert and rarity, it is very already made a helium leak detectors, it has become a scientific research, production of the necessary vacuum helium leak detection equipment 4. position on the periodic table of elements to show that it is the lowest boiling point of the substance; therefore high purity helium Price, helium for scientific development has brought great challenges and opportunities, but also demonstrates the broad helium own purposes, almost all modern high-tech industries and helium inseparable. Qingdao high purity helium, high purity helium Qinghai , the group provided by HSBC Ltd. Qingdao HSBC Trade and Industry group. Groups of Qingdao Fung Ltd. (www.qunlifeng.cn) strong, credible, in Qingdao, Shandong and other chemical products industry has accumulated a large number of loyal customers The company better work attitude and constantly improving innovative ideas will lead the group into the abundance of brilliant and you work for a better future!