API MPMS 22.6 2015 pdf free download
API MPMS 22.6 2015 pdf free download.Manual of Petroleum Measurement Standards Chapter 22.6 Testing Protocol for Gas Chromatographs.
1 Scope This standard is a general gas chromatograph (GC) performance test protocol. It specifies the scope and reporting requirements of GC tests for repeatability, reproducibility, and response linearity. The protocol specifies requirements for tests over a range of gas compositions, tests over a range of environmental conditions, and long-term performance tests. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. API Manual of Petroleum Measurement Standards (MPMS), Chapter 14—Natural Gas Fluids Measurement, Part 1— Collecting and Handling of Natural Gas Samples for Custody Transfer, February 2006 GPA Standard 2198 1 , Selection, Preparation, Validation, Care and Storage of Natural Gas and Natural Gas Liquids Reference Standard Blends 3 Terms, Definitions, Acronyms, Abbreviations, and Symbols 3.1 Terms and Definitions For the purposes of this document, the following definitions apply. 3.1.1 acceptance criteria Defined upper and lower limits for accepting the value of a process variable which is being monitored. 3.1.2 ambient conditions The conditions (pressure, temperature, humidity, etc.) of the medium surrounding an object such as the case of a meter, instrument, transducer, etc. 3.1.3 atmospheric pressure The pressure exerted by the weight of the atmosphere. At sea level, the pressure is approximately 14.7 pounds per square inch (101 kilopascals), often referred to as 1 atmosphere, atmospheric pressure, or pressure of one atmosphere. 3.1.4 barometric pressure Ambient pressure in an absolute pressure scale monitored or displayed by a barometer. 3.1.5 bias Any influence on a result that produces an incorrect approximation of the true value of the variable being measured. Bias is the result of a predictable systematic error.
3.1.6 calibration The process or procedure of adjusting an instrument, such as a meter, so that its indication or registration is in satisfactorily close agreement with a reference standard. 3.1.7 carrier gas A pure gas introduced so as to transport a sample through the separation unit of a gas chromatograph for analytical purposes. NOTE Typical carrier gases are hydrogen, nitrogen, helium, and argon. 3.1.8 certificate A document issued by a nationally or internationally recognized facility or regulatory agency attesting to a specific property or performance. 3.1.9 certificate of analysis A document that indicates one or more properties of a material based on the test result of an analysis or the preparation of the material in accordance with a defined procedure. NOTE 1 A certificate of analysis may be used to convey a laboratory test result, demonstrate conformance with a product specification, or provide information required for the certification of a reference material. NOTE 2 Industry standards or regulation may dictate what additional information is to be contained in a certificate of analysis for it to be valid for its intended use. 3.1.10 certified composition A list of component concentrations in a gas blend that is verified and traceable to nationally recognized standards of weights and measures. 3.1.11 chromatogram A graph relating concentration (or mass per unit time) of solute leaving a chromatographic column, plotted against time, and taking the form of a series of peaks. 3.1.12 chromatographic method, gas A method of analysis by which the components of a gas blend are separated using gas chromatography. 3.1.13 component concentration The presence of a component in a mixture expressed in percentage or as a fraction of the total mixture. 3.1.14 composition Property of a gas blend given by the identity and the concentration of each component.
3.1.15 compressibility factor In reference to gases, a factor calculated by taking the ratio of the actual volume of a given mass of gas at a specified temperature and pressure to its volume calculated from the ideal gas law at the same conditions. 3.1.16 concentration A reference to any of a group of four quantities characterizing the composition of a mixture with respect to the volume of the mixture. The four quantities are mass concentration (mass per unit volume), amount concentration (moles per unit volume), volume concentration (volume per unit total volume), and number concentration (count per unit volume). 3.1.17 condensation The process by which a gas or vapor changes to its liquid phase. 3.1.18 confidence interval The range or interval within which the true value is expected to lie with a stated degree of confidence.
