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The proposed approach not only possesses a good selectivity, but also has a linear relationship between the fluorescence intensity and the concentrations of Cu2+ in the range of 0.1 100 nM with the detection limit of 0.08 nM (5.12 × 10−9 mg mL−1), which is far below the limit value of 1.3 mg mL−1 defined by U.S. Environmental Protection Agency in drinkable water.
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These are significantly below the limit values for disposal to inert landfill.
Those substances are now banned from the products (below the limit values).
Test results show that the EMI power emission from massage is reduced, and below the limit values of the relevant standard, by promoting relevant circuits, which will supply some valuable reference further improving electrical and electronic products design.
The results confirm that exposure levels are strongly dependent on the location as well as on the topology and morphology of the indoor scenario, and although the microwave oven's leakage can degrade the quality of a wireless communication, as can be seen in the bibliography, the obtained electric field values are well below the limit values specified by ICNIRP.
Studies concluded that the mass loss due to surface scaling in UHPC is well below the limiting values (1000 1500 g/m2 (380–570 oz./ft2)) (Schmidt and Fehling 2005; Vernet 2004; Cwirzen 2007; Pierard and Cauberg 2009).
When the Zr content was increased to 20 wt.% or higher, the strengths were below the lower limit value in the DIN 13.927 standard (25 MPa).
Total VOC concentration in the air of the indoor environment was approximately 26 mg/m, with the concentration of each compound below the threshold limit value recommended for occupational exposure by the American Conference of Governmental Industrial Hygienists (1992).
Electrical conductivity of the final compost was below the salinity limit value of 3 ms/cm for compost to be used as organic fertilizer (Soumare et al. 2003).
The detection limit for Zn2+ was estimated at 48.1 nM, which was below the threshold limit value of Zn2+ in drinking water (46 μM) according to World Health Organization.
Interestingly, these effects were detected at concentrations of respirable dust, consisting mainly of glass microfibers, that were below the threshold limit value for respirable dust of 3 mg/m.
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