TY - GEN
T1 - Comparative analysis method of C-organic in fertilizers by gravimetry and spectrophotometry
AU - Purbaningtias, Tri Esti
AU - Qayyumah, Nursi Biwi
AU - Kurniawati, Puji
AU - Wiyantoko, Bayu
AU - Widati, Alfa Akustia
N1 - Publisher Copyright:
© 2018 Author(s).
PY - 2018/10/29
Y1 - 2018/10/29
N2 - Comparison methods of C-organic determining in organic fertilizers by gravimetry (ash content) and UV-Vis spectrophotometry (Walkley & Black) had been performed. The difference between the two methods was seen from the validation parameters of each method. This research used precision, homogeneity, stability test, control chart and measurement uncertainty as parameter of validation method. The result of method validation indicates that both methods are not precision, but have homogeneous results. The stability test showed that C-organic analysis by gravimetry had stable results while in the UV-Vis spectrophotometry method, the results were unstable. Control chart analysis showed the results of C-organic analysis in a organic fertilizer with gravimetry method statistically controlled, while the C-organic analysis of glucose solution as standard by UV-Vis spectrophotometry method was uncontrolled. The measured uncertainty value of the gravimetry method of 0.0041% is much smaller than the UV-Vis spectrophotometry method of 2.1529%. The average percentage of C-organic content obtained from the gravimetry method was 18.654%, while the average percentage of C-organic content produced using UV-Vis spectrophotometry method was 8.674%. These results indicated that both methods are significantly different.
AB - Comparison methods of C-organic determining in organic fertilizers by gravimetry (ash content) and UV-Vis spectrophotometry (Walkley & Black) had been performed. The difference between the two methods was seen from the validation parameters of each method. This research used precision, homogeneity, stability test, control chart and measurement uncertainty as parameter of validation method. The result of method validation indicates that both methods are not precision, but have homogeneous results. The stability test showed that C-organic analysis by gravimetry had stable results while in the UV-Vis spectrophotometry method, the results were unstable. Control chart analysis showed the results of C-organic analysis in a organic fertilizer with gravimetry method statistically controlled, while the C-organic analysis of glucose solution as standard by UV-Vis spectrophotometry method was uncontrolled. The measured uncertainty value of the gravimetry method of 0.0041% is much smaller than the UV-Vis spectrophotometry method of 2.1529%. The average percentage of C-organic content obtained from the gravimetry method was 18.654%, while the average percentage of C-organic content produced using UV-Vis spectrophotometry method was 8.674%. These results indicated that both methods are significantly different.
UR - http://www.scopus.com/inward/record.url?scp=85056277893&partnerID=8YFLogxK
U2 - 10.1063/1.5065015
DO - 10.1063/1.5065015
M3 - Conference contribution
AN - SCOPUS:85056277893
T3 - AIP Conference Proceedings
BT - 2nd International Conference on Chemistry, Chemical Process and Engineering, IC3PE 2018
A2 - Fatimah, Is
A2 - Kurniawan S., M. Arsyik
A2 - Sahroni, Imam
A2 - Chuenchom, Laemthong
A2 - Musawwa, Miqdam
A2 - Kawasaki, Hideya
A2 - Kamari, Azlan
PB - American Institute of Physics Inc.
T2 - 2nd International Conference on Chemistry, Chemical Process and Engineering 2018, IC3PE 2018
Y2 - 14 August 2018
ER -
