Multi-acid digestion uses a combination of HCl (hydrochloric acid), HNO3 (nitric acid), HF (hydrofluoric acid) and HClO4 (perchloric acid). Because hydrofluoric acid dissolves silicate minerals, these digestions are often referred to as 'near-total digestions'.

Multi-acid (4 acid) digestion is a very effective dissolution procedure for multi-element analysis at trace levels of detection. However, there can be a loss of volatile elements (e.g. B, As, Pb, Ge, Sb) during this type of digestion and some refractory minerals (especially oxide minerals) are only partially digested. Our experts will help you select a method that is fit-for-purpose.

Mining Multi-acid (4-acid) Digestions

ICP40B - 32 ELEMENTS BY FOUR-ACID DIGESTION / ICP-AES

LIMITS	LIMITS	LIMITS
Ag	2ppm	-	10ppm	Fe	0.01%	-	15%	Sb	5ppm	-	1%
Al	0.01%	-	15%	K	0.01%	-	15%	Sc	0.5ppm	-	1%
As	3ppm	-	1%	La	0.5ppm	-	1%	Sn	10ppm	-	1%
Ba	1ppm	-	1%	Li	1ppm	-	1%	Sr	0.5ppm	-	1%
Be	0.5ppm	-	0.25%	Mg	0.01%	-	15%	Ti	0.01%	-	15%
Bi	5ppm	-	1%	Mn	2ppm	-	1%	V	2ppm	-	1%
Ca	0.01%	-	15%	Mo	1ppm	-	1%	W	10ppm	-	1%
Cd	1ppm	-	1%	Na	0.01%	-	15%	Y	0.5ppm	-	1%
Cr	1ppm	-	1%	Ni	1ppm	-	1%	Zn	1ppm	-	1%
Co	1ppm	-	1%	P	0.01%	-	15%	Zr	0.5ppm	-	1%
Cu	0.5ppm	-	1%	Pb	2ppm	-	1%

The following elements can be added to above package:
Ce, Hf, Nb, Rb, Se, Te, Th, U

ICM40B - 49 ELEMENTS BY FOUR-ACID DIGESTION / ICP-AES AND ICP-MS

LIMITS	LIMITS	LIMITS
Ag	0.02ppm	-	10ppm	K	0.01%	-	15%	Sn	0.3ppm	-	0.1%
Al	0.01%	-	15%	La	0.1ppm	-	1%	Sr	0.5ppm	-	1%
As	1ppm	-	1%	Li	1ppm	-	1%	Ta	0.05ppm	-	1%
Ba	1ppm	-	1%	Lu	0.01ppm	-	0.1%	Tb	0.05ppm	-	1%
Be	0.1ppm	-	0.25%	Mg	0.01%	-	15%	Te	0.05ppm	-	0.1%
Bi	0.04ppm	-	1%	Mn	2ppm	-	1%	Th	0.2ppm	-	1%
Ca	0.01%	-	15%	Mo	0.05ppm	-	1%	Ti	0.01%	-	15%
Cd	0.02ppm	-	1%	Na	0.01%	-	15%	Tl	0.02ppm	-	1%
Ce	0.05ppm	-	0.1%	Nb	0.1ppm	-	0.1%	U	0.05ppm	-	1%
Cs	5ppm	-	0.1%	Ni	0.5ppm	-	1%	V	2ppm	-	1%
Cr	1ppm	-	1%	P	50ppm	-	15%	W	0.1ppm	-	1%
Co	0.1ppm	-	1%	Pb	0.5ppm	-	1%	Y	0.1ppm	-	1%
Cu	0.5ppm	-	1%	Rb	0.2ppm	-	1%	Yb	0.1ppm	-	0.1%
Fe	0.01%	-	15%	S	0.01%	-	5%	Zn	1ppm	-	1%
Ga	0.1ppm	-	0.05%	Sb	0.05ppm	-	1%	Zr	0.5ppm	-	1%
Hf	0.02ppm	-	0.05%	Sc	0.5ppm	-	1%
In	0.02ppm	-	0.05%	Se	2ppm	-	0.1%

The following elements can be added to the above package:
Dy, Er, Eu, Gd, Ho, Nd, Pr, Sm

AAS42S - FOUR-ACID, (HYDROFLUORIC, PERCHLORIC, HYDROCHLORIC AND NITRIC ACID) DISSOLUTION TO QUANTIFY MAJOR ELEMENT CONCENTRATIONS. AAS FINISH

LIMITS	LIMITS	LIMITS
Ag	5ppm	-	500ppm	Cr	50ppm	-	5%	Pb	20ppm	-	2.5%
As	0.025%	-	5%	Cu	10ppm	-	50%	Sb	100ppm	-	2%
Bi	50ppm	-	5000ppm	Fe	0.01%	-	40%	V	50ppm	-	5%
Ca	0.01%	-	40%	Mn	10ppm	-	5%	Zn	10ppm	-	5%
Cd	5ppm	-	5000ppm	Mo	20ppm	-	5%
Co	20ppm	-	2.5%	Ni	10ppm	-	5%

ICP42S - FOUR-ACID, (HYDROFLUORIC, PERCHLORIC, HYDROCHLORIC AND NITRIC ACID) DISSOLUTION TO QUANTIFY MAJOR ELEMENT CONCENTRATIONS. ICP-AES FINISH

LIMITS	LIMITS	LIMITS
Ag	5ppm	-	250ppm	Fe	250ppm	-	100%	Pb	25ppm	-	2.5%
AI	250ppm	-	40%	K	0.1%	-	40%	Sb	10ppm	-	2%
As	20ppm	-	2.5%	Li	5ppm	-	2500ppm	Sn	20ppm	-	2%
Bi	50ppm	-	2.5%	Mg	50ppm	-	40%	Ta	50ppm	-	2.5%
Ca	0.01%	-	40%	Mn	20ppm	-	10%	Ti	20ppm	-	5%
Cd	5ppm	-	2%	Mo	20ppm	-	2.5%	V	5ppm	-	2.5%
Co	10ppm	-	2.5%	Na	100ppm	-	40%	Zn	10ppm	-	5%
Cr	20ppm	-	5%	Ni	20ppm	-	2.5%	Zr	10ppm	-	5%
Cu	10ppm	-	2.5%	P	0.01%	-	25%

AAS43B - FOUR-ACID (HYDROFLUORIC, PERCHLORIC, HYDROCHLORIC AND NITRIC ACID) WITH HIGHER ELEMENTAL CONCENTRATIONS. AAS FINISH

LIMITS	LIMITS	LIMITS
Ag	50ppm	-	4%	Cr	0.03%	-	40%	Mo	0.02%	-	40%
Al	0.1%	-	100%	Cu	0.01%	-	100%	Na	0.01%	-	50%
As	0.02%	-	40%	Fe	0.02%	-	100%	Ni	0.01%	-	50%
Bi	0.05%	-	4%	K	0.01%	-	50%	Pb	0.01%	-	40%
Ca	0.01%	-	50%	Mg	0.01%	-	50%	Sb	0.05%	-	10%
Cd	50ppm	-	4%	Mn	0.01%	-	40%	Zn	0.01%	-	100%
Co	0.01%	-	2.5%

Mining Multi-acid (4-acid) Digestions

ICP40B - 32 ELEMENTS BY FOUR-ACID DIGESTION

ELEMENTS WHICH CAN VOLATILIZE

ELEMENTS WHICH CAN PRECIPITATE

ICM40B - 49 ELEMENTS BY FOUR-ACID DIGESTION

HAS40B - HYDRIDE ELEMENTS BY FOUR-ACID DIGESTION

AAS42S - FOUR-ACID

ICP42S - FOUR-ACID

AAS43B - FOUR-ACID

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LIMITS
Selenium	Se	0.2ppm	-	1000ppm
Tellurium	Te	0.5ppm	-	1000ppm