Application of a Spectroscopic Analysis-Based Portable Sensor for Phosphate Quantitation in Hydroponic Solutions

Table 4

Results of the triplet independent test validation.

Standard conc. (ppm)	1^st	2^nd	3^rd	Average	Error (%)	RPD (%)
33.33	39	36	41	38.67	9.91	7.74
50.00	45	54	59	52.67	7.36	6.42
120.00	103	125	133	120.33	6.10	4.53