Table 5.

Completeness of digestion in relation to digestion temperature and temperature hold time at constant ramp time (5 min)

Digestion temperature [°C]	Hold time at digestion temperature [min]	Visual evaluation of the sample [clear/not clear]
200	4	Clear
	3	Clear
	2	Clear
	1	Clear
180	4	Clear
	3	Clear
	2	Clear
	1	Clear
160	4	Clear
	3	Not clear
	2	Not clear
	1	Not clear
150	4	Not clear
	3	Not clear
	2	Not clear
	1	Not clear
120	1	Not clear
100	1	Not clear