Modern applications for a total sulfur reduction distillation method - what’s old is new again

Table 1 Commonly referenced literature for STRIP reagent in sulfur geochemistry and reagent details

	Luke, 1943	Pepkowitz & Shirley 1951	Thode et al. 1961	Forrest & Newman 1977	Johnston et al. 2007	Arnold et al. This study
Hydriodic acid	160 ml	100 ml	500 ml	500 ml	125 ml	200 ml
	s.g. = 1.7	47%	s.g. = 1.7	48%	n.o.s.	s.g. =1.7, 57%
	45 ml	40 ml	245 ml	245 ml	61 ml	100 ml
Hypophosphorous acid	n.o.s.	H₃PO₂	H₃PO₂	H₃PO₃^*	H₂PO₄^*	H₃PO₂
Hypophosphorous acid	50%	30%	50%	50%	n.o.s.	50%
Hydrochloric acid	160 ml	160 ml	816 ml	816 ml	205 ml	330 ml
	n.o.s.	conc	conc	conc	n.o.s.	36%

*All references call for the use “hypophosphorus” acid, variations in chemical formula are likely typographical errors. n.o.s. = not otherwise specified, s.g. = specific gravity.

ISSN: 1467-4866