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Efficacy of Shoebox Spectrophotometer Program Working on Smartphone to Measure Absorbance for Soil Phosphorus Analysis by Molybdenum Blue Colorimetric Method |
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| รหัสดีโอไอ | |
| Creator | Nuttakorn Intaravicha |
| Title | Efficacy of Shoebox Spectrophotometer Program Working on Smartphone to Measure Absorbance for Soil Phosphorus Analysis by Molybdenum Blue Colorimetric Method |
| Contributor | Nuttakorn Intaravicha |
| Publisher | Department of Agriculture |
| Publication Year | 2563 |
| Journal Title | Thai Agricultural Research Journal |
| Journal Vol. | 38 |
| Journal No. | 2 |
| Page no. | 150-160 |
| Keyword | Shoebox Spectrophotometer, Shoebox spectrophotometer, smartphone, soil phosphorus analysis, Molybdenum Blue colorimetric method |
| URL Website | http://at.doa.go.th/journal |
| Website title | Thai Agricultural Research Journal |
| ISSN | 0125-8389 |
| Abstract | This trial compared an efficacy of handmade spectrophotometer using Shoebox Spectrophotometer program working on smartphone and standard spectrophotometer (Shimadzu Model UV2600) for absorbance measurement in soil phosphorus analysis byMolybdenum Blue colorimetric method. The standard phosphorus solution at concentrationlevels ranging from 0-1.0 mg/L was analyzed by Molybdenum Blue colorimetric method andmeasured the absorbance by a handmade and a standard spectrophotometer. Resultsshowed simple linear regression with coefficient of determination (R2) at 0.997 and 0.998,respectively. The absorbance values given by a handmade spectrophotometer (x) werelower than those of standard spectrophotometer (y), but there was relationship in a positivelinear correlation manner with high correlation coefficient at R = 0.998, and linear equationof y = 2.48x 0.006. Available phosphorus in the soil was analyzed in five soil series; BangLen, Nong Kae, Yang Talat, Khao Yoi and Lop Buri, by Molybdenum Blue colorimetric methodand measured absorbance by a handmade (x) and a standard spectrophotometer (y).The results showed that there was relationship in a positive linear correlation with highcorrelation coefficient at R = 0.997 and linear equation of y = 0.649x + 3.787. |
