Good day, I've been looking for protocols that would help me in determining the changes in chlorophyll content of rice as it develops.

I've found this simple method using DMSO, and I wonder if there is any other simple way of knowing the chlorophyll a and b, and carotenoid of rice

Below is the sample protocol: 

Extraction and Determination of Chlorophyll

Take frozen plant (leaf) tissue (100 mg)

Place in 12 mL vial containing 7 mL DMSO

Incubate at 65°C for 30 mm

Transfer the sample to a 25 mL graduated tube

Bring the volume to 10 mL with DMSO (dimethyl suiphoxide)

(Note: calculate the volume based on tissue wt.)

Essay immediately or transfer to a vial and store between 0-4°C until analysis

Transfer 1 mL to a cuvette

Calibrate spectrophotometer against DMSO at 645 and 663 nm (Chl method)

Record absorbance at 645 and 663 nm

Calculate the chlorophyll content using Arnon’s equation

Arnon’s (1949) equations:

Chla (g l-1) = 0.0127 × A663 – 0.00269 × A645;

Chlb (g l-1) = 0.0229 × A645 – 0.00468 × A663;

Tot Chl (g l-1) = 0.0202× A645 + 0.00802 × A663.

References: Hiscox, J.D., and Tsraelstam, G.F. 1979. A method for the extraction of chlorophyll from leaf

tissue without maceration. Can. J. Bot. 57: 1332-1334.

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