Product consistency test

ASTM 1994. Standard Test Methods for Determining Chemical Durability of Nuclear Waste Glasses The Product Consistency Test (PCT). Standard Cl285-94. ASTM, Philadelphia. 

PAH PAN PBN PCT PES PHREEQC PIC PM PMATCHC PM-10 PM-2.5 PRB PUREX PW PWR PZC Polycyclic aromatic hydrocarbon Peroxyacetylnitrate Peroxybenzoylnitrate Product consistency test Plasma emission spectroscopy pH redox equilibrium calculations (computer program) Product of incomplete combustion Particulate matter Program to manage thermochemical data, written in C++ Particulate matter with an aerodynamic diameter <10 p,m Particulate matter with an aerodynamic diameter <2.5 p,m Powder River Basin Pu-U-recovery-extraction Purex waste Pressurized water reactor Point of zero charge... 

Product consistency test (PCT) DOE [14] Measures dissolution of structural elements of the waste form. Determines durability of radioactive waste forms in hot aqueous environment during storage... 

US Environmental Protection Agency, Treatment standards for hazardous debris, 40CFR Part 268.45,1994. American Society for Testing of Materials, Standard test methods for determining chemical durability of nuclear, hazardous, and mixed waste glasses the product consistency test, ASTM C 1285-97, 1997. American Nuclear Society, American National Standard Measurement of the leachabiUty in solidified low-level radioactive wastes by a short term test procedure, Method ANSl/ANS 16.1-1986, 1986. 

The repeatability and reproducibility values have important implications for quality. As the demand for clear product specifications, and hence control over product consistency, grows, it is meaningless to establish product specifications that are more restrictive than the reproducibility/repeatability values of the specification test methods. 

Though these may provide a standard for screening production quality, they are merely representative. The flexural properties will be a consistent test of the many possible mechanical property testing modalities. Other areas of physical properties that are important to the success of a composite dental restorative are radiopacity, polymerization shrinkage and thermal interactions, e.g., thermal expansion and thermal diffusivity. 

All finished products are tested for sterility in a controlled-access clean room environment in a laminar flow hood, which provides no greater level of a microbial challenge than that encountered in the fill environment. The testing environment consists of a gowning room and sterility test suite that meets the same air quality standards as the hlling suite. 

There should be a clear distinction between in-process controls and validation. In-process tests are performed during the manufacture of each batch using specifications and methods devised during the development phase. The aim is to monitor the process continuously and not exactly validate it. When a new manufacturing formula or method is adopted, steps should be taken to demonstrate its suitability for routine processing prior to the validation. The defined process using the materials and equipment specified should be shown to yield a product consistently of the required quahty. 

It is important to assure consistency from lot-to-lot for the desired functionality. While the compendial monograph focuses on chemical characteristics and demonstrates the safety of the raw material, some excipients require functionality tests to assess their performance in the finished drug product. These tests reflect the physical... 

Vacuum-Steam-Pressure Test. A special aging test which has been used successfully in the USA to accelerate aging to produce the effects of 6-month tropical exposure on certain types of sealed fuzes. It is primarily a development test which can be used during production The test consists of subjecting bare fuzes to 1000 fifteen-minute consecutive cycles in a vacuum-steam-pressure environment. The 1000 cycles takes about 10 days of continuous running time. The basic cycle consists of temperature-humidity cycling superimposed on pressure cycling in a test chamber with a salt laden atmosphere. Representative curves of temperature and pressure are shown in Fig 1... 

The tests to be made on such products consist mainly in the technical tests of the quality and intensity of the colour, covering power, fastness to light and to atmospheric and chemical agents and behaviour towards other pigments these tests are made by the ordinary general methods. As regards chemical analysis, this is usually limited to a qualitative examination for the detection of any adulterations. 

Timken EP test—measure of the extreme-pressure properties of a lubricating oil (see EP oil). The test utilizes a Timken machine, which consists of a stationary block pushed upward, by means of a lever arm system, against the rotating outer race of a roller bearing, which is lubricated by the product under test. The test continues under increasing load (pressure) until a measurable wear scar is formed on the block. Timken OK load is the heaviest load that a lubricant can withstand before the block is scored (see scoring). 

Equipment calibration. This quality function for production consists of a viable calibration program for equipment that provides in-process test data or a measurable indication of the controlled process used. This activity is needed so that the manufacturing unit will know whether the equipment is operating consistendy during the time period covered by the calibration activity. This effort is also a continuing commitment of production to maintain its equipment as it was documented to perform during its installation qualification (IQ) and operational qualification (OQ) activities. 

In order to monitor the flavor of their products more closely, the Florida Citrus Processors Association has contracted with the USDA Processed Products Branch to operate a taste panel in which current FCOJ production is tested on a weekly basis. The panel consists of local consumers (generally housewives) and personnel from each of the participating plants (other types of citrus products have been evaluated in the past). Panelists rate samples on a 9-point scale from a low of "extremely poor" to a high of "excellent". Juices are ranked according to flavor score and a copy of the rankings are sent to each processor with only that particular processor s product identified (3). 

Chinese scientists used trialkyl phosphine oxides (TRPO) to remove long-lived radioactive nuclides from high-level liquid waste (67, 167). TRPO is the trademark of a Chinese commercial product, consisting of a mixture of several TRPO (with alkyl chains from hexyl to octyl). The TRPO process has been tested in China and at ITU in Karlsruhe (2, 168-174). 

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