4500-SO42− C. Gravimetric Method with Ignition of Residue Bibliography
4500-SO42− D. Gravimetric Method with Drying of Residue Bibliography
4500-SO42− E. Turbidimetric Method Bibliography
4500-SO42− F. Automated Methylthymol Blue Method Bibliography
4500-SO42− G. Methylthymol Blue Flow Injection Analysis Reference