Urine appears 'Liquid Gold' in which poisoning:
B i.e. Barbiturate Barbiturate poisoning presents with features of shock i.e. hemo-concentration & oliguriaQ, therefore the urine is highly concentrated & deep yellowQ. I think this could very well mean 'Liquid gold'. Liquid gold is a slang used for urine of amphetamine addictsQ, which is collected and sold because 40% of amphetamine is excreted unchanged in urine.
Heavy metals
Barbiturate(Amphetamine)
Organophosphorous
Lead poisoning