Hydrogen Testing
Midwest Microlab is capable of testing solid or liquid samples for total percentage of Hydrogen with a range of 0.01% (100 ppm) to 100%. Accuracy for Hydrogen Testing is within +/- 0.15. Glove Box handling is available for Hydrogen Testing on environmentally sensitive samples. Please refer below for testing methods, interferences and sample size chart.
CHN Testing
Carbon Testing
Hydrogen Testing
Nitrogen Testing
Finding Total Percentage of Hydrogen
Hydrogen Analysis & Techniques
The Hydrogen analysis & techniques method used is an upgraded form originally researched in Switzerland. It has since been marketed by various firms in the U.S. Fundamentally, the scheme involves combustion of a sample in ultra-pure oxygen at 990 deg C in a closed system.
The products (gasses) are swept through copper to remove excess Oxygen and Silver salts to remove Halogens, Phosphorus, and Sulfur. Since the heat conductivity depends upon its composition, the mixture of remaining gasses is sensed. The H2O is removed. Later the CO2 is removed and finally only N2 remains. Sensing is done after each removal.
The instrument is calibrated using various standards from the NIST. Thus Hydrogen can be determined in one run, from the same sample selection. Running one sample at a time enables us to check for inorganic residue post combustion, greater accuracy rates and eliminates cross contamination.
Air Sensitive / Glove Box Handling
Air sensitive analysis is available for any combination of Carbon, Hydrogen, Nitrogen and Oxygen testing. For an accurate evaluation of purity, air-sensitive samples require weighing under an inert atmosphere. Midwest Microlab maintains a reduced oxygen and moisture free handling system. Very highly hygroscopic samples many times will also benefit from this type of special handling. The glove box is operated with 99.9% EXTRA dry nitrogen. Purging is done under vacuum before any samples are handled. An oxygen monitor continually checks the internal environment for the presence of oxygen. The system also contains electrostatic reduction equipment to aid in handling. Samples weighed under an inert atmosphere MUST be transferrable. These samples must be either liquids or solids. Please click on the following link for Air Sensitive / Glove Box fees: Midwest Microlab Price List
Interferences Associated with Hydrogen Analysis:
Known interferences for Hydrogen analysis include: Hygroscopic or high moisture samples may require additional drying prior to Hydrogen analysis. Please note if Deuterium (2H or D) is present on the submission form in the molecular formula section .
Suggested Sample Size according to Total Percentage Theory:
Theory % Hydrogen Single Hydrogen Duplicate HydrogenTriplicate
0-5 % 10 mg 20 mg 30 mg
5-20% 5 mg 10 mg 20 mg
Above 20% 3 mg 6 mg 9 mg
For Air Sensitive samples we would recommend sending an additional 3 mg per run.
Turnaround Time
Standard Turnaround time for the total percentage of Hydrogen results is within 3-5 business days. RUSH services are available for an additional fee per sample,per analysis with per single run. Rush results turnaround time for Hydrogen analysis is within 2-3 business days.
Midwest Microlab does NOT handle any samples containing Osmium, Uranium, or Thallium within the molecular formula. Midwest Microlab is able to perform samples with Depleted Uranium but must be clearly indicated on the submission form. Please indicate on the comments section of the submission form if samples have a high toxicity or strong stench. We do not handle any Finished Pharmaceuticals for release or highly volatile liquid samples with boiling points of less than 40 deg C.
Hydrogen Analysis & Techniques: What is Hydrogen?
Atomic Weight 1.00, Atomic Number 1, Melting Point -259.16 C, Boiling Point -252.87 C
Hydrogen (Latin: ‘hydrogenium’, from Ancient Greek: hydro: “water” and genes: “forming”) is a chemical element in the periodic table that has the symbol H and atomic number 1. At standard temperature and pressure it is a colorless, odorless, nonmetallic, univalent, tasteless, highly flammable diatomic gas (H2).
With an atomic mass of 1.00794 g/mol, hydrogen is the lightest element. It is also the most abundant, constituting roughly 75% of the universe’s elemental matter.[1] Stars in their main sequence are overwhelmingly composed of hydrogen in its plasma state.
Elemental hydrogen is relatively rare on Earth, and is industrially produced from hydrocarbons, after which most free hydrogen is used “captively” (meaning locally at the production site), with the largest markets about equally divided between fossil fuel upgrading (e.g. hydrocracking) and in ammonia production (mostly for the fertilizer market).
The most common naturally occurring isotope of hydrogen contains one electron and an atomic nucleus of one proton. In ionic compounds it can take on either a positive charge (becoming a cation, a bare proton) or a negative charge (becoming an anion known as a hydride).
Hydrogen can form compounds with most elements and is present in water and all organic compounds. It plays a particularly important role in acid-base chemistry, in which many reactions involve the exchange of protons between soluble molecules.
As the only element for which the Schrödinger equation can be solved analytically, study of the energetics and bonding of the hydrogen atom has played a key role in the development of quantum mechanics.
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