Dutch standard

A concern for alkaline as well as solid polymer electrolysers should be the sensitivity of the electrolysers to contaminants in the feed water. The minimum required water quality of an industrial solid polymer electrolyzer is ASTM type II water [48], which contains at maximum 5 pg L 1 of sodium and chlorine, and 3 pg L 1 Si02 [52], It should have a maximum conductivity of 0.25 pS cm 1. Clean drinking water meeting Dutch standards contains around 60 mg L 1 of... 

Low brown, equal to No, 7 to 8 Dutch standard—very scarce. 

Chemical European (Dutch) standards (mg/kg soil dry weight) United States standards (mg/kg soil dry weight) ... 

European Committee for Standardization CEN/TC 275/WG5. Criteria of Analytical Methods for Mycotoxins (N. 93). Delft The Netherlands, Dutch Standardization Institute, 1993. 

In practice, tlie sugar is sometimes merely compared with a series of types, such as the Dutch standards. 

Column test (described in Dutch standard NEN 7343) is intended to simulate the percolation of (acidic) rainwater through granular materials in a road construction or landfill. The material is placed in a column with a diameter of 5 cm and height of 20 cm, and acidified demineralized water is then passed upwards through it. The eluate is collected in seven fractions at a liquid/solid ratio of between 0.1 and 101 kg-1. The leaching is calculated and expressed in mg kg 1 as a function of time, based on the analysis results. 

This test, which lasts 64 days and is described in Dutch standard NEN 7345, is intended to determine leaching from products or stabilized waste materials as a function of time. The product is immersed in acidified demineralized water. This eluate is refreshed at seven specified times. Analysis of the eluates enables the leaching per square meter of product surface area and the effective diffusion coefficient to be calculated. 

Cascade test (described in Dutch standard NEN 7349) provides information on long-term leaching from a granular material. In this test the material is brought into contact with acidified demineralized water five times in succession for 23 h. The cumulative L/S (liquid/solid) ratio is 100 1 kg1. This test also yields an emission, expressed in mg kg-1. 

Bal, R. (1998) Boundary Dynamics in Dutch Standard Setting for Occupational Chemicals. In R. Bal and W. Halffman (Eds.), The politics of chemical risk scenarios for a regulatory future (pp. 75-103). Dordrecht Kluwer Academic Publishers. 

BS 5212 1975 Dutch Standard KIWA C-50 Sealants tor water retaining and excluding structures BS 6920 1988 Intumescent sealants ... 

Nederlands Normalisatie Institute (NNI). 1988. Soil-determination of the influence of chemicals on soil nitrification. Nederlands Normalisatie Institute, Delft, The Netherlands, Dutch Standard NEN 5795. 

To assess the mental and psychomotor development of infants exposed to PCBs both pre- and postnatally, the Dutch standardized version of the Bayley Scales of Infant Development were administered at 3, 7, and 18 months of age. Both the MDI and the PDI were included in the assessments. The tests were performed at the infant s home in the presence of the parent(s) (Koopman-Esseboom et al. 1996). The evaluations of the infants using the Bayley Scales of Infant Development were undertaken only for the 207 children from Rotterdam. Rotterdam is an urban area thought to have higher exposures to PCBs than Groningen, a semi-urban area in northern Holland. 

The standard diffusion protocol that is imposed by Vlarea is the Dutch standard NEN 7345. This test, however, takes 64 days. This is too long to allow a fast evaluation of candidate secondary building materials. Therefore, a two-step leaching test is under development (prEN 12457-3). This test takes only 24 h. It is the latter that has been used to evaluate Graveliet and its use as a shaped material. 

Fig. 4.18 Determination of smoke production by measuring the effluent smoke from the flash-over test chamber on the basis of the withdrawn Dutch Standard NEN 3883-1975 Reprinted from Ref. 23 by permission of John Wiley and Sons Ltd. Copyright John Wiley and... 

Dutch Standards for Fire Retardance of Electrical Goods ... 

The process is called ACTIS (Amorphous Carbon Treatment on Internal Surface). It consists of coating the internal surface of a standard single-layer PET bottle with a layer of highly hydrogenated amorphous carbon, obtained from food gas in its plasma state. The coating creates a thin (about 0.1 pm thick) barrier inside the bottle. The food safety quality has been approved by the Dutch standards authority (which is also accredited to the European Union), and the coated bottle is 100% recyclable. 

An interesting example of the determination of a substance which is neither toxic nor a pollutant but which determines the quality of butter because of its flavor is that of diacetyl[33]. From a melted butter sample diacetyl is removed by steam-distillation and determined by DPP at pH 5.2. Acetoin must be first oxidated with FeClg to diacetyl. According to Dutch standards, first quality butter must contain 1 mg.kg of diacetyl. 

NEN Dutch standard NeSSI new sampling/sensor initiative NEPA National Fire Protection Assoc. 

Prepare the sample according to Dutch standard. Note If analysis is postponed, the prepared sample should be stored in a cool place, i.e., about 8 C. It should be removed from cold storage a few hours before commencing the analysis and be allowed to attain room temperature, i.e., 20 2°C, without any active heating. In the sample container the sample should be mixed with a spamla.)... 

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