id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cet-13100		cet-13100		6	.pdf	application/pdf	3374	114	40	Nowadays, the Watts nickel solution is the most wildly used and requires a mixture of nickel chloride, nickel sulphate and boric acid with high metal concentration, as far as 100g/L. 127 The ability to monitor the concentration of the Watt solution over time using appropriate sensor ensures, on one hand, the correct and homogeneous distribution of the metal on the chosen substrate and, on the other, it guarantees no leak of Ni, a metal harmful either to the environment and human, from the bath. The calibration curve based on the specific absorbance values is shown in Figure 2b; the R2 value, which is close to 1 (R2=0,99), confirms the high linearity toward metal concentrations.	cache/cet-13100.pdf	txt/cet-13100.txt